WO2022119601A1 - Buse à intérieur lisse à haute efficacité - Google Patents

Buse à intérieur lisse à haute efficacité Download PDF

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Publication number
WO2022119601A1
WO2022119601A1 PCT/US2021/038393 US2021038393W WO2022119601A1 WO 2022119601 A1 WO2022119601 A1 WO 2022119601A1 US 2021038393 W US2021038393 W US 2021038393W WO 2022119601 A1 WO2022119601 A1 WO 2022119601A1
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WO
WIPO (PCT)
Prior art keywords
nozzle
section
cross
exit
stream
Prior art date
Application number
PCT/US2021/038393
Other languages
English (en)
Inventor
Sunny Sethi
Original Assignee
HEN Nozzles Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US17/112,993 external-priority patent/US11779938B2/en
Priority claimed from US17/112,990 external-priority patent/US20210086006A1/en
Priority to CA3200926A priority Critical patent/CA3200926A1/fr
Priority to AU2021390427A priority patent/AU2021390427A1/en
Application filed by HEN Nozzles Inc. filed Critical HEN Nozzles Inc.
Priority to US17/569,821 priority patent/US20220176177A1/en
Priority to PCT/US2022/012242 priority patent/WO2022271203A1/fr
Priority to AU2022300109A priority patent/AU2022300109A1/en
Priority to CA3223691A priority patent/CA3223691A1/fr
Priority to PCT/US2022/030831 priority patent/WO2022271388A1/fr
Priority to PCT/US2022/030833 priority patent/WO2022271389A1/fr
Priority to US17/828,093 priority patent/US20220296943A1/en
Publication of WO2022119601A1 publication Critical patent/WO2022119601A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C31/00—Delivery of fire-extinguishing material
    • A62C31/02—Nozzles specially adapted for fire-extinguishing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
    • B05B1/044—Slits, i.e. narrow openings defined by two straight and parallel lips; Elongated outlets for producing very wide discharges, e.g. fluid curtains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/06—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in annular, tubular or hollow conical form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B05B1/3402—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to avoid or to reduce turbulencies, e.g. comprising fluid flow straightening means

Definitions

  • the present invention relates generally to systems and methods for manipulating water flow to generate water stream for fire suppression and other purposes. More specifically, the present invention relates to nozzles used with fire hoses.
  • the nozzles may be designed to fit different hose sizes and can be manufactured out of different materials including but not limited to metals and polymers.
  • a variety of methods are employed by fire departments across the U.S. to suppress fires.
  • the fundamental mechanism of any fire suppression technique involves one or more of the following strategies: 1. Reduce ambient temperature; 2. Dilute amount of oxygen; 3. Introduce radical quenchers in the system; and 4. Remove the flammable material.
  • Water is an excellent fire control material due to its thermal, physical, and chemical characteristics. When water is introduced in a fire, two key fire suppression effects occur: 1. Cooling effect: Water has a heat capacity of 4.2 J/g.K and a latent heat of vaporization of 2442 J/g. What this means is that if say a gallon of water, at 20°C in poured on a burning fire and all the water evaporates, then the total heat that water will extract from the fire is 10.5MJ.
  • LOC Limiting Oxygen Concentration
  • Reach or range is defined as the distance that the waterjet can travel. This means the waterjet need to have a maximum velocity that is allowable with the given equipment.
  • the velocity of the water stream or waterjet at the point where it leaves the nozzle and enters the atmosphere is termed as exit velocity.
  • Another key aspect that determines water's effective reach is the droplet size. Small droplets dissipate easier than larger droplets. For two water streams with the same exit velocity, the stream with smaller water droplets will dissipate sooner and would have a smaller effective range than the stream with larger droplets. For fire-fighter safety and effectiveness of fire control, the line of attack needs to be as far as possible. Another key aspect to consider is the penetration of waterjets.
  • Penetration is the ability of the waterjet to cut through dense media and reach the target.
  • dense media in firefighting include hot gases, thick grass, or other fuel source.
  • the hot gases from the burning region maybe flowing at significant velocity. Any droplets that get blown away before reaching the fire lead to lower efficiency, lower effective range and may even pose risk to fire fighters.
  • Penetration is a direct function of the momentum of the water droplet. That is, it depends on both the velocity and the mass of the water droplet.
  • a water stream’s evaporation efficiency is a critical parameter that determines how much heat would be absorbed per unit water used.
  • the burning structures include grass, trees, and airborne foliage. Water that falls on the ground may seep into the porous surface and not contribute to cooling. As an example, say 1 Gallon of water is introduced in a fire area and only 0.5 Gallon of water evaporate. Other 0.5 Gallon falls on the porous ground and gets seeped in the ground. Total heat absorbed in this case would be:
  • the geometry of the water stream can play a critical role both for fire suppression rate and ergonomics of the firefighters. Ideally more lateral area covered by a waterjet would allow firefighters to cover a larger area with fewer bodily movements. In addition, for certain fires, wider water streams present a more stable geometry to allow targeting the fire region with greater precision as compared to narrow water streams. For a given flow rate, a larger width water stream will have a thinner profile. This tends to create unstable water stream and it would start converting to smaller droplets before reaching a suitable target.
  • diverging streams are most ideally suited, where diverging streams can be defined as a water stream that increases in external surface area as it moves from source to target This process of increasing the external surface area causes the water stream to start thinning and eventually break down in smaller droplets.
  • Nozzles are often used to manipulate the flow of the incoming water stream to create an outgoing stream with suitable velocity and geometry.
  • Nozzles are devices that have two openings, an “inlet” or the opening through which water enters the nozzle and an “outlet” or region through which the water leaves the nozzle.
  • the incoming water stream that enters the inlet of the nozzle is defined by its “static pressure” and its “volumetric flow rate”.
  • the static pressure is the pressure exerted by a fluid when there is no flow. This pressure is generally measured by stopping the water flow using devices such as end caps or valves and measuring the pressure using pressure gauge. Pumps like in fire engines or firehydrants maybe used to create generate this pressure.
  • the volumetric flow rate is a function of pressure, hose type, hose length, and nozzle.
  • PSI pounds per square inch
  • a typical static pressure in fire hydrants can range from 50PSI - 100PSI.
  • Fire engines may be able to use pumps to create higher PSI.
  • the volumetric flow rate of the stream is the volume of water passing through a cross-section per unit time.
  • FIG. 4 An example of Bernoulli’s flow is shown in Fig. 4.
  • a key aspect governing cooling efficiency is the throughput of water that is coming out of the nozzle.
  • the amount of back-pressure depends on the geometry of the flow channel. For the given water throughput, that is measured in units such as gallons per minute (gpm), this back pressure increases as the ratio of inlet and outlet increases. This means that as we go to smaller and smaller outlet diameter, we cannot increase the velocity of the stream indefinitely.
  • the constricted exit starts to reduce the gpm. Therefore, two different CSAs may have the same exit velocity but different GPM. This constriction effect where GPM is reduced by reducing the exit CSA is used to control the flow-rate of the fire-hose nozzles. For example, in cases where water availability is constrained, a lower GPM stream is preferable. In that scenario, smaller orifice nozzles are used by the fire-fighters.
  • the inner geometry of the nozzle can also impact the backpressure and flow rate.
  • a large number of spray or fog nozzles are based on impinging of high-velocity water on some form of a surface to break the waterjet down in smaller droplets.
  • Geometries that allow water flow without significant back-pressure are called streamlined bodies.
  • the flow pathways that can create a no-flow zone in certain sections are called blunt or bluff or blunt bodies.
  • the efficiency of the exiting stream may include other factors, such as back blow, the impact of wind on the stream direction, and ability of the stream to deliver maximum amount of the water at the target.
  • fog nozzles due to formation of small droplets very close to the nozzle, the water is highly sensitive to wind directions and a significant amount of water may be lost before reaching the target.
  • Nozzle reaction is the force that nozzle exerts on the fire fighter handling the nozzle. This reaction force has two components to it. A backward force that is caused due to large volumes of water exiting through the nozzle and a combination of upward and backward force that is caused due to poor design of the nozzle.
  • Smooth bore nozzles and have a truncated cone geometry. They are known as smooth bore because the flow pathway inside the nozzle has no features or restrictions. This allows the water to flow without experiencing any backpressure.
  • Smooth bore nozzles are defined by the inlet size and opening diameter of the exit. For example, for handlines nozzles in the US, most of the smooth-bore nozzles have an inlet of 1.5”. These 1.5” inlet nozzles may have exit diameters from 3/8” to more than 1”. These exit diameters are also known as the orifice size. Fire-departments decide what orifice size to employ based on a variety of factors like type of fire and availability of water. As an example, municipal fire departments that have access to fire-hydrants may choose a 15/16” orifice nozzle, whereas a wildland fire department with no access to fire-hydrants may choose 3/8” or U” orifice nozzle.
  • smooth-bore nozzles have long reach and high penetration.
  • these water streams lack high surface area that is required to boost the cooling efficiency.
  • a 3/8” smooth bore nozzle, under 50 PSI may have a flow of 30 GPM and a 15/16” smooth bore nozzle under similar condition will have a flow of 150 GPM. That is a 5x volume increase.
  • external surface area of a 15/16” nozzle is only 2.5x that of 3/8” nozzle. This leads to significantly lower evaporation efficiency of a 15/16” smooth bore nozzle as compared to a 3/8” smooth bore nozzle. This leads to longer than expected time to suppress a given fire and wastage of water.
  • Fog nozzles have a high surface area stream that is ideal for faster heat removal.
  • the mechanism by which these fog streams are created cause significant loss of kinetic energy causing high residual pressure in the nozzle. This high residual pressure can manifest itself as a combination of high nozzle reaction, low reach and low gpm.
  • fog nozzles create small water droplets right at the orifice of the nozzle. These small droplets have small momentum, thus causing low penetration efficiency and low wind stability.
  • An ideal nozzle is one that can combine reach and penetration of smooth bore nozzle with high efficiency of fog nozzles.
  • the present invention is to design a nozzle that can combine high reach and penetration of a smooth bore nozzle with a high surface area of fog nozzles.
  • the nozzles are designed to generate a water stream with one or more of the following key attributes: 1. High velocity; 2. High GPM; 3. High surface area to enable faster evaporation.; 4. Have a wide diverging stream to allow covering maximum area.; 5. Low nozzle reaction as compared to comparative fog nozzles.
  • the flow pathway in the nozzle is designed such that there are no blunt sections that could cause excessive loss of water kinetic energy. This is then combined with a suitable exit cross-sectional area.
  • the optimized cross-sectional-area (CSA) allows attaining high velocity, based on conservation of mass.
  • the cross-sectional area for given conditions is chosen such that it can allow attaining maximum velocity without significant loss in the exit gpm. For example, if the baseline water flow is 150gpm, the exit CSA should be such that due to residual pressure in nozzle, the GPM should stay at > 90GPM. Similar reduction factors were used to create a more suitable exit geometry of jets to enable high-velocity streams with high surface area.
  • This specific example is provided for the purposes of illustration and ease of explanation. However, a person of ordinary skill in the art would appreciate the many variations and alterations to the provided details are within the scope of the invention. This example is not intended to limit the embodiments of the subject matter of the application or uses of such embodiments.
  • cross-sectional area or “csa” or “CSA” refers to the area of a section of the water stream at that point.
  • the exit csa would be the circle of the same diameter as the exiting water stream diameter.
  • the CSA would be the difference in area of external circle and the internal circle that form the cross -section of that hollow cylinder.
  • surface area refers to the external surface area of the stream of water per unit length.
  • Surface area at exit refers to the surface area per unit length of the stream right after it exits the nozzle. This value of “surface area” or surface area per unit length, would be equal to the perimeter of the stream at that section. For example, for a solid stream of 1” diameter, the surface area per unit length would be equal to 7ixl”.
  • range means distance to which the water stream can reach under given conditions of pressure and throughput.
  • the range increases with increasing pressure and reduces with reducing pressure.
  • the smaller cross-sectional area will typically result in the longer range, however this relationship of range and cross-sectional area is not linear and after a certain point, the range will start reducing with further reduction in cross-sectional area.
  • throughput means the amount of water coming out of the nozzle.
  • the standard units to measure throughput are gallons per minute (gpm) or liters per minute (1pm).
  • exit-velocity means the speed of the water stream as it exits the nozzle. Exit velocity has a direct correlation with range for a given nozzle type. For some nozzles, like fog nozzles, exit velocity maybe high but due to the formation of small water droplets early on, the range may be low.
  • rectangular or “rectangular shape” means a geometric shape defined by its width and height. A rectangular shape where width and height are equal is square. Rectangular shapes can have sharp comers or rounded comers. The radius of the comers could be a function of manufacturing constraints, design constraints or solely for decorative purposes.
  • residual pressure is the amount of pressure that nozzle is exerting back on the water stream. As csa goes down, this residual pressure increases and causes reduction in throughput. Some nozzles like fog nozzles have high residual pressure due to blunt inserts.
  • streamlined means structures that do not hinder flow of the fluid.
  • Streamlined structure 1 shows an example of a streamlined body.
  • Streamlined structure 1 has a gradual change in topography allowing fluid 2 to flow around it without creating back flow or turbulence.
  • nozzle uses streamlined geometries to enhance water velocity the net backpressure is minimal due to any backflow. There will still be backpressure due to boundary conditions as more and more fluid tries to exit through a smaller cross-sectional area.
  • blunt or “bluff’ means a structure or feature that has sharp transitions causing fluid to create backflow and turbulent conditions.
  • An example of a blunt structure is shown in FIG 2.
  • the blunt surface 3 creates a barrier to flow to the fluid 4, forcing fluid to create back flows and turbulence.
  • diverging means moving apart or increasing in CSA. A diverging stream would be one where the CSA at nozzle exit is smaller than CSA at the target. Some fog nozzles have diverging profiles.
  • heat removal rate of a stream is the amount of heat absorbed per unit time.
  • the heat removal rate can be measured in units of KiloWatts (KW) and is a critical quantity determining water stream's effectiveness in controlling fire.
  • coverage means the width of the stream when it reaches the target. Coverage will determine the amount of area at the target that would be covered by the stream and is a critical quantity for fire control.
  • a “smooth bore nozzle” is a type of nozzle that has a uniform reduction in CSA.
  • a typical smooth bore nozzle has a truncated conical geometry as shown in FIG 3.
  • a typical smooth bore nozzle 5 has a streamlined fluid flow pathway 6. This allows water to move from a larger cross-section to a smaller cross-section without experiencing any regions of backflow. Due to streamlined flow pathways, smooth bore nozzles can attain high reach and penetration. The key drawback of a smooth bore nozzle is the low surface area of the exiting stream.
  • a “fog nozzle” is a type of nozzle that deliberately creates turbulence in water to generate smaller water droplets. These water droplets allow stream with higher surface area, which can have a higher heat absorption rate.
  • a typical fog nozzle structure is shown in FIG 4.
  • the fog nozzle 12 has a semi -blunt insert 13. The insert helps break down the water stream 14 in smaller droplets as water exits the nozzle 15. The turbulence created by the insert 13 manifests itself in back pressure and allows breaking the stream down in water droplets.
  • These fog nozzles can be narrow stream fog nozzles or wide stream fog nozzles.
  • the term “substantially” is defined as largely but not necessarily wholly what is specified. In any disclosed embodiment, the terms “substantially.” “approximately, and “about may be substituted with “within a percentage of what is specified” In addition, certain terminology may also be used in the following description for the purpose of reference only, and thus are not intended to be limiting.
  • FIG 1 is a schematic illustration showing an example of a streamlined body. The schematic shows that the fluid can move around the body without encountering any dead spots.
  • FIG 2 is a schematic illustration of a blunt body. The flow pathway has sections that can inhibit fluid flow and cause back-pressure and turbulence.
  • FIG 3 is schematic example showing a cross-section of a conventional smooth bore nozzle.
  • the exit cross-sectional area is smaller than the entry cross-sectional area allowing the fluid to get enhanced velocity.
  • the pathway is streamlined.
  • the exiting water stream has a low surface area.
  • FIG 4 is a schematic diagram showing a cross-section of a typical fog nozzles that are used currently.
  • the nozzle has a semi-blunt insert that is attached to the outer body of the nozzle with help of various attachments and screws.
  • the incoming waterjet is forced to impinge on the blunt section and create water droplets.
  • FIG 5 is a perspective view of a high efficiency nozzle in accordance with an exemplary embodiment of the present invention.
  • FIG 6 is a perspective cutaway view of the nozzle of FIG 5.
  • the cross-section shows a streamlined cone is used to expand the incoming stream to create an outgoing stream with high velocity and surface area.
  • FIG 7 is a perspective view of another embodiment of the present invention, wherein the incoming water stream is expanded to a larger outer diameter and at the same time a streamlined cone is used to reduce the exiting cross-sectional area of water stream.
  • FIG 8 is a perspective cutaway view of the nozzle of FIG 7.
  • the cross-section shows how external diameter of water stream is expanded at the same time as the net cross-sectional area is reduced. This allows outgoing stream with higher velocity and surface area.
  • FIG 9 is an image of nozzle from FIG 7 with 75 PSI water connected to it.
  • the image shows exiting stream and the pressure gauge reading residual pressure.
  • FIG 10 is an image of water stream coming out of nozzle from FIG 7 with 75 PSI water connected to it.
  • the image shows exiting stream with large outer surface area and large range.
  • FIG 11 is a perspective view of another exemplary embodiment of the present invention, wherein the incoming cylindrical water stream is converted into a rectangular stream with significantly higher surface area and velocity.
  • FIG 12 is a perspective cutaway view of the nozzle of FIG 11.
  • the cross-section shows a streamlined pathway is used to spread and compress the incoming stream simultaneously to create a high velocity rectangular stream.
  • FIG 13 is an image of water stream coming out of nozzle from FIG 11 with 75 PSI water connected to it.
  • the image shows exiting stream with large outer surface area and large range.
  • FIG 14 is a perspective image of water stream coming out of nozzle from FIG 11 with 75 PSI water connected to it.
  • the image shows exiting stream with large range and an extremely large coverage at target.
  • the figure also shows the thin edge of the profile.
  • FIG 15 is a perspective view of another exemplary embodiment of the present invention, wherein the incoming cylindrical water stream is converted in a rectangular stream in first stage of the nozzle and then directed to diverge laterally.
  • FIG 16 is a perspective cutaway view of the nozzle of FIG 15.
  • the cross-section shows a streamlined pathway is used to spread and compress the incoming stream simultaneously to create a high velocity rectangular stream. This stream is then directed to diverge on coming out of the nozzle.
  • FIG 17 is a schematic illustration of another exemplary embodiment of the present invention, wherein the incoming cylindrical water stream follows a pathway like current smooth bore nozzles to enhance the velocity. However, towards the exit end of the nozzle, streamlined structures are used to divide the stream in multiple diverging streams. This allows having similar reach and penetration as jet nozzle however with higher surface area and coverage.
  • FIG 18 is a perspective wire-frame view of the nozzle of FIG 17.
  • the image shows a streamlined pathway is used to initially enhance the velocity of incoming stream and then diverge it in multiple exiting streams.
  • FIG 19 is a perspective view of another exemplary embodiment of the present invention, wherein the incoming cylindrical water stream is converted in a rectangular stream in first stage of the nozzle and then directed to exit as multiple rectangular streams.
  • FIG 20 is a perspective wire-frame view of the nozzle of FIG 19.
  • the image shows a streamlined pathway is used to initially enhance the velocity of the incoming stream and convert it into a rectangular stream. This then diverges laterally in multiple streams.
  • FIG 21 is a perspective view of a high-efficiency nozzle in accordance with an exemplary embodiment of the present invention.
  • the nozzle is such that the fluid flow pathway converges to a smaller cross-section before diverging to the final exit geometry.
  • This smaller cross-section is referred to as transitional cross-section.
  • the cross-sectional area of the transitional cross-section is such that it is smaller than or equal to the nozzle inlet, and it is larger than or equal to the nozzle outlet.
  • FIG 22 is a perspective cutaway view of the nozzle of FIG 21.
  • the cross-section shows internal geometric parameters that enable the formation of a water stream with a desirable profile.
  • FIG 23 is another perspective cutaway view of the nozzle of FIG 21.
  • the cross-section shows internal geometric parameters that enable the formation of a water stream with a desirable profile.
  • FIG 24 is a perspective view of another embodiment of the high-efficiency nozzle of Fig 21, wherein the nozzle has an extended transitional region that enables regulating fluid streamlines and minimizing turbulence.
  • FIG 25 is a perspective cutaway view of the nozzle of FIG 24.
  • FIG 26 is a perspective view of another embodiment of the high-efficiency nozzle of Fig 21, wherein the nozzle has an extended transitional region that enables regulating fluid streamlines and minimizing turbulence, and the exit end of the nozzle has an extended straight profde that helps in regulating the divergence angle.
  • FIG 27 is a perspective view of another embodiment of the high-efficiency nozzle of Fig 26, wherein the nozzle has external and internal filets for ease of manufacturing and reducing turbulence associated with sharp comers.
  • FIG 28 is a perspective cutaway view of the nozzle of FIG 27.
  • the cross-section shows internal filets formed for ease of manufacturing and reducing turbulence associated with sharp comers.
  • FIG 29 is a perspective view of another embodiment of the high-efficiency nozzle of Fig 21 wherein the transitional region is circular. This circular transitional region then translates into the final exit geometry.
  • FIG 30 is a perspective view of a high-efficiency nozzle in accordance with an exemplary embodiment of the present invention wherein two transition regions are present in the fluid pathway.
  • FIG 31 is a perspective cutaway view of the nozzle of FIG 30.
  • the cross-section shows internal geometric parameters that enable the formation of a water stream with a desirable profile.
  • FIG 32 is another perspective cutaway view of the nozzle of FIG 30.
  • the cross-section shows internal geometric parameters that enable the formation of a water stream with a desirable profile.
  • FIG 33 is a perspective view of another embodiment of the high-efficiency nozzle of Fig 30, wherein the second transitional region of the nozzle is extended to enables regulating fluid streamlines and minimizing turbulence.
  • FIG 34 is a perspective cutaway view of the nozzle of FIG 33.
  • the cross-section shows internal geometric parameters that enable the formation of a water stream with a desirable profile.
  • FIG 35 is another perspective cutaway view of the nozzle of FIG 33.
  • the cross-section shows internal geometric parameters that enable the formation of a water stream with a desirable profile.
  • FIG 36 is a perspective view of another embodiment of the high-efficiency nozzle of Fig 30, wherein the nozzle has an extended transitional region that enables regulating fluid streamlines and minimizing turbulence, and the exit end of the nozzle has an extended straight profile that helps in regulating the divergence angle.
  • FIG 37 is a perspective view of another embodiment of the high-efficiency nozzle of Fig 36, wherein the nozzle has external and internal fdets for ease of manufacturing and reducing turbulence associated with sharp comers.
  • FIG 38 is a perspective cutaway view of the nozzle of FIG 37.
  • the cross-section shows internal fdets formed for ease of manufacturing and reducing turbulence associated with sharp comers.
  • FIG 39 is a perspective view of a high-efficiency nozzle in accordance with an exemplary embodiment of the present invention wherein the exiting profile is elliptical.
  • FIGS 40-41 are perspective cutaway views of the nozzle of FIG 39.
  • the cross-section shows internal geometric parameters that enable formation of water stream with desirable profile.
  • FIG 42 is an exemplary illustration for how the present invention defines and uses the term “rectangular shape” as defined by its width and height.
  • water stream and waterjet are used interchangeably and is defined as water flowing through the air, where it exited from a nozzle.
  • This waterjet or water stream may have a velocity component parallel to the nozzle or it may have a trajectory that is diverging at certain angles.
  • this water stream or waterjet maybe composed of continuous water streamlines or water droplets of varying sizes. The water stream or waterjet maybe such that it exits the nozzle as a solid stream and breaks down in smaller water droplets as it moves further from the nozzle.
  • Fire-suppression is defined as reducing the intensity of a fire. Fire suppression may lead to the complete elimination of fire or reduction of the intensity of a fire.
  • the high-efficiency nozzles can be directly attached to a hose or attached via the use of a suitable adaptor.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • a nozzle with a 1.5” NH female thread can directly attach to a 1.5” NH male thread on the hose.
  • a nozzle with a 1.5” NH male thread can attach to a 1.5” male thread on the hose via 1.5”xl.5” female-female adaptor.
  • This specific example is provided for the purposes of illustration and ease of explanation. However, a person of ordinary skill in the art would appreciate the many variations and alterations to the provided details are within the scope of invention. This example is not intended to limit the embodiments of the subject matter of the application or uses of such embodiments.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 1”, 1.5”, 2” or 2.5”; garden hose sizes and NPT sizes used with smaller water flow.
  • the outlet area is optimized based on the inlet GPM, pressure rating, and desired output GPM. For example, for a 1.5” NH nozzle with an inlet pressure of 75PSI and an incoming GPM of 150-200 a suitable outlet CSA would be in the range of 0.1 inch 2 to 1 inch 2 . A smaller outlet CSA would allow reducing the output of the water stream and allow increasing the stream velocity.
  • a wildland fire department may prefer an outgoing flow of 35 GPM and require outlet to be 0.1 inch 2
  • a municipal fire department may require a flow of 150GPM requiring outlet to be 1 inch 2 .
  • the choice of a suitable CSA depends on the final application. This specific example is provided for the purposes of illustration and ease of explanation. However, a person of ordinary skill in the art would appreciate the many variations and alterations to the provided details are within the scope of the invention. This example is not intended to limit the embodiments of the subject matter of the application or uses of such embodiments.
  • FIG 5-6 provides detailed illustrations of high-efficiency nozzle 100 in accordance with an exemplary embodiment of the current invention.
  • the nozzle inlet 101 can be directly attached to a hose or attached via use of a suitable adaptor.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 1”, 1.5”, 2” or 2.5”.
  • the inlet 101 can have suitable fitting or threads that would allow it to directly attach to a hose or attach to the hose using an adaptor.
  • the threads can be male of female threads as per the requirement.
  • the exit 102 is designed such that it forms a hollow cylinder on exit.
  • the hollow cylinder geometry allows increasing the external surface area which allowing a suitable CSA at exit to attain high stream velocity.
  • the FIG 6 shows the cross-section of the nozzle 100.
  • the water flow pathway is designed such that there is a streamlined cone 103 inside the nozzle.
  • the cone is designed such that it creates the hollow cylinder stream without causing any backpressure or turbulence.
  • the angle at which cones top surface penetrates the water 104 can have a value from 10° to 60°. The smaller angle would allow a more gradual transition of a solid stream into a hollow cylinder stream but would make the nozzle very long. The larger angle would allow a smaller nozzle size but would require a more rapid transition.
  • FIG 5-6 another exemplary embodiment of high efficiency nozzle 100 is presented.
  • the nozzle inlet 101 can be directly attached to a hose or attached via use of a suitable adaptor.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 1”, 1.5”, 2” or 2.5”.
  • the inlet 101 can have suitable fitting or threads that would allow it to directly attach to a hose or attach to the hose using an adaptor.
  • the threads can be male of female threads as per the requirement.
  • the exit 102 is designed such that it forms a hollow cylinder on exit.
  • the hollow cylinder geometry allows increasing the external surface area which allowing a suitable CSA at exit to attain high stream velocity.
  • FIG 6 shows the cross-section of the nozzle 100.
  • the water flow pathway is designed such that there is a streamlined cone 103 inside the nozzle.
  • the cone is designed such that it creates the hollow cylinder stream without causing any back -pressure or turbulence.
  • the angle at which cones top surface penetrates the water 104 can have a value from 10° to 60°. The larger angle would allow a smaller nozzle size but would require a more rapid transition.
  • the high efficiency nozzle 100 can further have a straight section 105, such that the exiting stream can attain a more stable profile before exiting the nozzle.
  • the straight section 105 can allow minimize impact of any geometric transition from a solid stream to a hollow cylinder on the exiting stream. This straight section can have a length of 0.02” to 2”.
  • FIG 5-6 another exemplary embodiment of high efficiency nozzle 100 is presented.
  • the nozzle inlet 101 can be directly attached to a hose or attached via use of a suitable adaptor.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 1”, 1.5”, 2” or 2.5”.
  • the inlet 101 can have suitable fitting or threads that would allow it to directly attach to a hose or attach to the hose using an adaptor.
  • the threads can be male of female threads as per the requirement.
  • the exit 102 is designed such that it forms a hollow cylinder on exit.
  • the hollow cylinder geometry allows increasing the external surface area which allowing a suitable CSA at exit to attain high stream velocity.
  • FIG 6 shows the cross-section of the nozzle 100.
  • the water flow pathway is designed such that there is a streamlined cone 103 inside the nozzle.
  • the cone is designed such that it creates the hollow cylinder stream without causing any back -pressure or turbulence.
  • the angle at which cones top surface penetrates the water 104 can have a value from 10° to 60°. The larger angle would allow a smaller nozzle size but would require a more rapid transition.
  • the high efficiency nozzle 100 can further have a straight section 105, such that the exiting stream can attain a more stable profile before exiting the nozzle.
  • the straight section 105 can allow minimize impact of any geometric transition from a solid stream to a hollow cylinder on the exiting stream.
  • This straight section can have a length of 0.02” to 2”.
  • the streamlined cone 103 is such that it is removable.
  • the configuration allows ease of manufacturing, wherein the nozzle is assembled using two components.
  • the first component is the cylindrical configuration with suitable diameter and threads and the second component is the cone.
  • the cone can be assembled inside the cylindrical configuration via suitable mechanisms including but not limited to via screws, snap-on fasteners, welding, or any alternate mechanism.
  • FIG 5-6 another exemplary embodiment of high efficiency nozzle 100 is presented.
  • the nozzle inlet 101 can be directly attached to a hose or attached via use of a suitable adaptor.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 1”, 1.5”, 2” or 2.5”.
  • the inlet 101 can have suitable fitting or threads that would allow it to directly attach to a hose or attach to the hose using an adaptor.
  • the threads can be male of female threads as per the requirement.
  • the exit 102 is designed such that it forms a hollow cylinder on exit.
  • the hollow cylinder geometry allows increasing the external surface area which allowing a suitable CSA at exit to attain high stream velocity.
  • FIG 6 shows the cross-section of the nozzle 100.
  • the water flow pathway is designed such that there is a streamlined cone 103 inside the nozzle.
  • the cone is designed such that it creates the hollow cylinder stream without causing any back-pressure or turbulence.
  • the angle at which cones top surface penetrates the water 104 can have a value from 10° to 60°.
  • the cone is designed such that the front end of the cone extends beyond the front end of the outer wall of the nozzle. This extended length can be anywhere from 0.25mm to 25mm. This extended section helps to further guide the stream and form a complete circular profile.
  • FIG 5-6 another exemplary embodiment of high efficiency nozzle 100 is presented.
  • the nozzle inlet 101 can be directly attached to a hose or attached via use of a suitable adaptor.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 1”, 1.5”, 2” or 2.5”.
  • the inlet 101 can have suitable fitting or threads that would allow it to directly attach to a hose or attach to the hose using an adaptor.
  • the threads can be male of female threads as per the requirement.
  • the exit 102 is designed such that it forms a hollow cylinder on exit.
  • the hollow cylinder geometry allows increasing the external surface area which allowing a suitable CSA at exit to attain high stream velocity.
  • FIG 6 shows the cross-section of the nozzle 100.
  • the water flow pathway is designed such that there is a streamlined cone 103 inside the nozzle.
  • the cone is designed such that it creates the hollow cylinder stream without causing any back -pressure or turbulence.
  • the angle at which cones top surface penetrates the water 104 can have a value from 10° to 60°.
  • the cone is designed such that the front end of the cone towards the nozzle exit has a diverging profde.
  • the diverging angle can be anywhere from 0.5° to 60°. This diverging profile allows the exiting stream to have a diverging profile on exiting the nozzle.
  • the nozzle 100 can be such that it is manufactured using a single component or the nozzle can be manufactured using multiple components. The method of manufacturing would not impact the functionality of these nozzles. A few examples are provided for ease of explanation and are not intended to limit the scope of present invention. These components can be manufactured individually and then put together using suitable fasteners that could include snap fittings, screws, welds, or adhesives. This specific example is provided for the purposes of illustration and ease of explanation.
  • the nozzle 100 can be such that it is manufactured using metallic alloys like brass or various aluminum alloys.
  • metallic alloys like brass or various aluminum alloys.
  • aluminum alloy 356 aluminum alloy 356.
  • the nozzles can also be manufactured using polymers or composite materials. Some example of suitable polymers that can be used to manufacture these nozzles include but are not limited to ABS, poly amides, poly carbonate, poly olefins like HDPE, PP and LDPE.
  • the nozzle can be manufactured using 3D printing techniques using a printer like Stratasys F120 3D printer. The choice of material or the manufacturing techniques used would not impact the key functionality of these nozzles.
  • FIGs 7-10 provide illustrations of high efficiency nozzle 200, in accordance with another exemplary embodiment of the current invention.
  • the nozzle 200 is designed such that the exiting stream has a hollow cylinder configuration similar to nozzle 100, however in this case the outer diameter of the exiting stream is even larger than the outer diameter of the incoming solid stream.
  • the nozzle inlet 201 can be directly attached to a hose or attached via use of a suitable adaptor. The method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 1”, 1.5”, 2” or 2.5”.
  • the inlet 201 can have suitable fitting or threads that would allow it to directly attach to a hose or attach to the hose using an adaptor.
  • the threads can be male of female threads as per the requirement.
  • the exit 202 is designed such that it forms a hollow cylinder on exit.
  • the hollow cylinder has an outer diameter that is larger than the outer diameter of the incoming water stream, this allows enhances the external surface area.
  • the diameter of the incoming water stream 203 can be increased such that the diameter of the exiting stream 204 is anywhere from 10% to 300% larger than 203.
  • a streamlined cone 205 is used to morph the incoming stream in a hollow cylinder.
  • the angle of the cone can be anywhere from 10° to 60°. As the stream comes out of the cone, it has an outer surface area proportional to
  • the nozzle 200 is designed such that the exiting stream has a hollow cylinder configuration similar to nozzle 100, however in this case the outer diameter of the exiting stream is even larger than the outer diameter of the incoming solid stream.
  • the nozzle inlet 201 can be directly attached to a hose or attached via use of a suitable adaptor.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 1”, 1.5”, 2” or 2.5”.
  • the inlet 201 can have suitable fitting or threads that would allow it to directly attach to a hose or attach to the hose using an adaptor.
  • the threads can be male of female threads as per the requirement.
  • the exit 202 is designed such that it forms a hollow cylinder on exit.
  • the hollow cylinder has an outer diameter that is larger than the outer diameter of the incoming water stream, this allows enhances the external surface area.
  • the diameter of the incoming water stream 203 can be increased such that the diameter of the exiting stream 204 is anywhere from 10% to 300% larger than 203.
  • a streamlined cone 205 is used to morph the incoming stream in a hollow cylinder.
  • the angle of the cone can be anywhere from 10° to 60° and the stream has a straight section before exiting the nozzle to allow a more stable profile on exit.
  • the length of this straight section can be anywhere from 0.02” to 2”.
  • the nozzle 200 is designed such that the exiting stream has a hollow cylinder configuration similar to nozzle 100, however in this case the outer diameter of the exiting stream is even larger than the outer diameter of the incoming solid stream.
  • the nozzle inlet 201 can be directly attached to a hose or attached via use of a suitable adaptor.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to garden hose (GH) sizes ’A” %” or 1”; National Hose (NH) sizes 1”, 1.5”, 1.75” 2” or 2.5”.
  • the inlet 201 can have suitable fitting or threads that would allow it to directly attach to a hose or attach to the hose using an adaptor.
  • the threads can be male of female threads as per the requirement.
  • the exit 202 is designed such that it forms a hollow cylinder on exit.
  • the hollow cylinder has an outer diameter that is larger than the outer diameter of the incoming water stream, this allows enhances the external surface area.
  • the diameter of the incoming water stream 203 can be increased such that the diameter of the exiting stream 204 is anywhere from 10% to 300% larger than 203.
  • a streamlined cone 205 is used to morph the incoming stream in a hollow cylinder.
  • the angle of the cone can be anywhere from 10° to 60° and the stream has a straight section before exiting the nozzle to allow a more stable profde on exit.
  • the length of this straight section can be anywhere from 0.02” to 2”.
  • the cone is designed such that the front end of the cone extends beyond the front end of the outer wall of the nozzle. This extended length can be anywhere from 0.005” to 1”. This extended section helps to further guide the stream and form a complete circular profile.
  • the nozzle 200 is designed such that the exiting stream has a hollow cylinder configuration similar to nozzle 100, however in this case the outer diameter of the exiting stream is even larger than the outer diameter of the incoming solid stream.
  • the nozzle inlet 201 can be directly attached to a hose or attached via use of a suitable adaptor.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 1”, 1.5”, 2” or 2.5”.
  • the inlet 201 can have suitable fitting or threads that would allow it to directly attach to a hose or attach to the hose using an adaptor.
  • the threads can be male of female threads as per the requirement.
  • the exit 202 is designed such that it forms a hollow cylinder on exit.
  • the hollow cylinder has an outer diameter that is larger than the outer diameter of the incoming water stream, this allows enhances the external surface area.
  • the diameter of the incoming water stream 203 can be increased such that the diameter of the exiting stream 204 is anywhere from 10% to 300% larger than 203.
  • a streamlined cone 205 is used to morph the incoming stream in a hollow cylinder.
  • the angle of the cone can be anywhere from 10° to 60° and the stream has a straight section before exiting the nozzle to allow a more stable profile on exit.
  • the length of this straight section can be anywhere from 0.02” to 2”.
  • the cone is designed such that the front end of the cone towards the nozzle exit has a diverging profile.
  • the diverging angle can be anywhere from 0.5° to 60°. This diverging profile allows the exiting stream to have a diverging profile on exiting the nozzle.
  • the nozzle 200 can be such that it is manufactured using a single component or the nozzle can be manufactured using multiple components. The method of manufacturing would not impact the functionality of these nozzles. A few examples are provided for ease of explanation and are not intended to limit the scope of present invention. These components can be manufactured individually and then put together using suitable fasteners that could include snap fittings, screws, welds, or adhesives.
  • An example of the components that can be manufactured as individual component to form the final nozzle includes a diverging adaptor that can allow incoming stream to go from 203 to 204 and a cone 205. The cone 205 can then be attached to the adaptor using suitable fittings. This specific example is provided for the purposes of illustration and ease of explanation. However, a person of ordinary skill in the art would appreciate the many variations and alterations to the provided details are within the scope of invention. This example is not intended to limit the embodiments of the subject matter of the application or uses of such embodiments.
  • the nozzle 200 can be such that it is manufactured using metallic alloys like brass or various aluminum alloys.
  • the nozzles can also be manufactured using polymers or composite materials. The choice of material would not impact the functionality of these nozzles.
  • FIG 9 and FIG 10. A specific example of the nozzle 200 is provided in FIG 9 and FIG 10. This specific example is provided for the purposes of illustration and ease of explanation. However, a person of ordinary skill in the art would appreciate the many variations and alterations to the provided details are within the scope of invention. This example is not intended to limit the embodiments of the subject matter of the application or uses of such embodiments.
  • the nozzle 200 for this specific case was designed for an incoming water stream of 1.5” diameter.
  • the outlet CSA can for this specific example can be in the range of 0.2 inch2 to ,75inch2 and the straight section can be in the range of 0.25”- 1”.
  • the exiting stream had an outer diameter of 2.5” and the CSA of exiting stream was in the range of 0.25 inch2 to 1 inch2.
  • the pressure gauge 207 showed extremely low residual pressure in the nozzle.
  • the final stream had a surface area 2.5 times that of the standard smooth bore nozzle yet had same range and throughput as a smooth bore nozzle with comparative outlet CSA. This 2.5 times enhanced external surface area allows higher area of contact between the water stream and the hot medium in burning structures and would allow significantly faster fire control rates.
  • a target CSA of 100mm2 is selected.
  • the circle that will have a CSA of 100 mm2 will have a perimeter of approximately 35.44mm.
  • a rectangle with length of 100mm and width of 1mm, will have the same CSA of 100 mm2, however its perimeter would be 202mm. This is 6 times more than the perimeter of the circle.
  • FIGs 11-14 provide illustrations of high efficiency nozzle 300, in accordance with another exemplary embodiment of the current invention.
  • the nozzle 300 is designed such that the exiting stream has a rectangular profile.
  • the nozzle inlet 301 can be directly attached to a hose or attached via use of a suitable adaptor. The method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 1”, 1.5”, 2” or 2.5”.
  • the inlet 301 can have suitable fitting or threads that would allow it to directly attach to a hose or attach to the hose using an adaptor.
  • the threads can be male of female threads as per the requirement.
  • the exit 302 is designed such that the exiting stream forms a rectangular cross-section on exiting the nozzle.
  • the thickness of the stream 303 and the length of the stream 304 dictate the CSA and perimeter.
  • the thickness 303 is designed such that it has a value greater than 0.1 mm and less than 10mm.
  • the value of 304 is derived using the value of 303 and the desired exiting CSA.
  • the value of 304 can vary anywhere from 0.5” to 8”.
  • the CSA can have a value in the range of 0.1 inch2 to 2 inch2.
  • the circular to rectangular geometry has a completely streamlined flow without any blunt section.
  • the rate of transition from circle to rectangle is determined by the convergence angle 305.
  • This angle dictates the length over which the circular cross-section gets converted in a rectangular cross-section.
  • the value of this angle 305 can be anywhere from 10° to 60°.
  • the circular cross-section of incoming waterjet is gradually transformed in a rectangular geometry without creating any blunt sections that could cause back pressure.
  • FIGs 11-14 provide illustrations of high efficiency nozzle 300, in accordance with another exemplary embodiment of the current invention.
  • the nozzle 300 is designed such that the exiting stream has a rectangular profile.
  • the nozzle inlet 301 can be directly attached to a hose or attached via use of a suitable adaptor. The method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 1”, 1.5”, 2” or 2.5”.
  • the inlet 301 can have suitable fitting or threads that would allow it to directly attach to a hose or attach to the hose using an adaptor.
  • the threads can be male of female threads as per the requirement.
  • the exit 302 is designed such that the exiting stream forms a rectangular cross-section on exiting the nozzle.
  • the thickness of the stream 303 and the length of the stream 304 dictate the CSA and perimeter.
  • the thickness 303 is designed such that it has a value greater than 0.1 mm and less than 10mm.
  • the value of 304 is derived using the value of 303 and the desired exiting CSA.
  • the value of 304 can vary anywhere from 0.5” to 8”.
  • the CSA can have a value in the range of 0.1 inch2 to 2 inch2.
  • the circular to rectangular geometry has a completely streamlined flow without any blunt section.
  • the rate of transition from circle to rectangle is determined by the convergence angle 305. This angle dictates the length over which the circular cross-section gets converted in a rectangular cross-section.
  • the value of this angle 305 can be anywhere from 10° to 60°.
  • the circular cross-section of incoming waterjet is gradually transformed in a rectangular geometry without creating any blunt sections that could cause back pressure.
  • Another variation of the current embodiment is presented.
  • a straight section 306 is designed.
  • the straight section 306 is such that the exiting stream can attain a more stable profile before exiting the nozzle.
  • This straight section 306 can allow minimize impact of any geometric transition from a circle to a rectangle on the exiting stream.
  • the length of this straight section 306 ca be anywhere from 0” to 4”.
  • FIG 13 and FIG 14 A specific example of the nozzle 300 is provided in FIG 13 and FIG 14. This specific example is provided for the purposes of illustration and ease of explanation. However, a person of ordinary skill in the art would appreciate the many variations and alterations to the provided details are within the scope of invention. This example is not intended to limit the embodiments of the subject matter of the application or uses of such embodiments.
  • the nozzle 300 for this specific case was designed for an incoming water stream of 1.5” diameter.
  • the CSA of the exiting slot/rectangle in this specific case was in the range of 150mm2 to 750mm2.
  • the height of the slot/rectangle at the outlet was in the range of 1mm to 10mm.
  • the exiting stream had a width 307 of 4”.
  • this particular example shows that the exiting stream from nozzle 300 has more than 3 times the surface area while maintaining the range and throughput.
  • the exiting stream has a thin cross-section 308. This allowed the stream to be minimally impacted by the wind. As the rectangular stream hits the target, it diverges and provides a coverage of 3ft-5ft. This coverage is significantly larger as compared to l”-2” coverage provided by traditional smooth bore nozzles.
  • the nozzle 300 can be such that it is manufactured using a single component or the nozzle can be manufactured using multiple components. The method of manufacturing would not impact the functionality of these nozzles. A few examples are provided for ease of explanation and are not intended to limit the scope of present invention. These components can be manufactured individually and then put together using suitable fasteners that could include snap fittings, screws, welds, or adhesives. This specific example is provided for the purposes of illustration and ease of explanation.
  • the nozzle 300 can be such that it is manufactured using metallic alloys like brass or various aluminum alloys.
  • the nozzles can also be manufactured using polymers or composite materials. The choice of material would not impact the functionality of these nozzles.
  • FIGs 15-16 provide illustrations of high efficiency nozzle 400, in accordance with another exemplary embodiment of the current invention.
  • nozzle 400 is designed such that exiting stream has diverging profile. Diverging flow is a flow wherein the CSA of the stream increases as it moves further away from the nozzle.
  • the diverging flow can be two directional diverging flow, wherein both the width and thickness increase with the distance or the diverging flow can be one directional, wherein only one-dimension increases.
  • the nozzle inlet 401 can be directly attached to a hose or attached via use of a suitable adaptor.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 1”, 1.5”, 2” or 2.5”.
  • the inlet 401 can have suitable fitting or threads that would allow it to directly attach to a hose or attach to the hose using an adaptor.
  • the threads can be male of female threads as per the requirement.
  • the diverging stream comes out of the exit 402.
  • the diverging profile of nozzle 400 allows maximizing the coverage at the target.
  • the water stream CSA is converted from the circular to rectangular profile in a streamlined manner and the CSA is reduced to allow enhanced velocity in the section 403.
  • This rectangular profile is then expanded on one or two directions in the section 404.
  • the angle at which the stream diverges is given by divergence angle 405.
  • the divergence angle allows the waterjet coming out of the nozzle to spread at a greater rate.
  • the divergence angle 405 can be anywhere from 0.5° to 45°.
  • the angle of divergence can vary from a straight slot/rectangle jet at 0 degrees to a high spread slot/rectangle jet which can be as high as 45 degrees. The reach and penetration will reduce as we increase the divergence angle.
  • FIG 17-18 provide illustrations of high efficiency nozzle 500, in accordance with another exemplary embodiment of the current invention.
  • Nozzle 500 is designed such that the exiting stream of water is divided in multiple streams in a streamlined fashion. This process of dividing the stream in multiple streams allow increasing the surface area by more than 200% while keeping the cross-sectional area the same. This allowed to maintain the exit velocity of the waterjet while enhancing the surface area significantly.
  • the exiting water stream can be divided in 2-12 streams and the nozzle 500 shown in FIG 17 is an example, not intended to limit the scope of the invention.
  • the nozzle inlet 501 can be directly attached to a hose or attached via use of a suitable adaptor. The method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 1”, 1.5”, 2” or 2.5”.
  • the inlet 501 can have suitable fitting or threads that would allow it to directly attach to a hose or attach to the hose using an adaptor.
  • the threads can be male of female threads as per the requirement.
  • the multiple streams come out of the exit 502.
  • a nozzle can have an exit with 2 - 12 sections of pie that are diverging outward at angles ranging from 0.5 degrees to 30 degrees.
  • Such multiple section nozzles can also replace the traditional fog nozzles with conical patterns.
  • the high efficiency nozzles designed as in the drawing will have a more streamlined geometry, hence allowing greater range at similar spread to a traditional fog nozzle.
  • FIG 18 shows the wireframe depicting interior pathway of the spreading pie design as described in the current embodiment.
  • FIG 19-20 provide illustrations of high efficiency nozzle 600, in accordance with another exemplary embodiment of the current invention.
  • Nozzle 600 is designed such that circular cross-section of the nozzle is gradually transformed in a linear cross-section without creating any blunt surface. This is then divided in multiple independent streams with linear pattern. This linear pattern of streams allows higher coverage area.
  • the example shown in FIG 19 and FIG 20 is for ease of explanation and is not intended to limit the scope of the present invention.
  • the exiting stream can have anywhere from 2 to 25 individual streams.
  • the nozzle inlet can be directly attached to a hose or attached via use of a suitable adaptor. The method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 1”, 1.5”, 2” or 2.5”.
  • NH National Hose
  • the inlet can have suitable fitting or threads that would allow it to directly attach to a hose or attach to the hose using an adaptor.
  • the threads can be male of female threads as per the requirement.
  • the multiple streams come out of the exit 501.
  • a nozzle can have an exit with 2 - 12 sections of linear streams that can go in a straight manner or they can be diverging outward at angles ranging from 0.5 degrees to 30 degrees.
  • Such multiple section nozzles can also replace the traditional fog nozzles with conical patterns.
  • the high efficiency nozzles designed as in the drawing will have a more streamlined geometry, hence allowing greater range at a similar spread to a traditional fog nozzle.
  • FIG 20 shows the wireframe depicting interior pathway 602 of the spreading pie design as described in the current embodiment.
  • FIGs 21-23 provides detailed illustrations of ahigh-efficiency nozzle 700 in accordance with an exemplary embodiment of the current invention.
  • the nozzle inlet 701 can be directly attached to a hose or attached via the use of a suitable adaptor or have another functional element between the hose and the nozzle like an on-off valve or a flow meter.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 3/8”, 1”, 1.5”, 2” or 2.5”; or US garden hose sizes
  • the threads on the inlet section 701 can be male or female threads as per the requirement.
  • the type of thread does not impact of limit the functionality of the nozzle.
  • the exit 702 is designed such that as the water stream exits the nozzle, it forms a flat stream geometry.
  • the velocity of the stream is a function of the cross-sectional area (CSA) of the nozzle exit, whereas the external surface area is a function of perimeter of the water stream exiting the nozzle.
  • CSA cross-sectional area
  • perimeter of the water stream exiting the nozzle For any given geometric shape, a circle has the smaller ratio of perimeter to area. As compared to a circular geometry, a thin rectangle has significantly higher ratio of perimeter to area.
  • This ratio of the CSA and perimeter for a rectangular geometry is a direct function of the ratio of the width of the rectangle and its height. Higher is the ratio of width and height of the rectangle, also known as the aspect ratio of the rectangle, higher would be the ratio of its perimeter and area.
  • the width of the exiting water stream is determined by the width of the nozzle exit 703; the thickness of the water stream is determined by the height of the nozzle exit 704.
  • the nozzle 700 is designed such that the incoming water stream converges to a transitional cross-section 705 with a profile P and an area A.
  • This position of transitional cross-section 705 is such that it lies in between the nozzle inlet and the nozzle exit.
  • the profile P of the transitional area 705 can be a square, a square with rounded edges, an ellipse, or a circle.
  • the area A of the transitional cross-section is such that it is equal to or smaller than the inlet cross-section and it is equal to or greater than the exit cross-section.
  • transitional cross section 705 can be any rectangular shape, such as a square, and the comers of such a shape can be designed and defined by rounded or sharp edges or comers.
  • a rectangular shape as used to define the transitional cross-section and transitional sections, is defined as a geometric shape, such that it has a dimension defined by its width, its height (as well as length when defining a transitional section having a length/depth.
  • the shape is such that the width and the height can be the same (a square) or different (a rectangle).
  • the ratio of width of the rectangular shape to height of the rectangular shape is defined as the aspect ratio.
  • the comers of the rectangular shape can be sharp or have a radius to them. The comers do not significantly impact properties of the rectangular shape but may be required due to constraints of the manufacturing system.
  • this transitional area is critical. This transitional area also reduced the water streamlines cross-over.
  • transitional cross-sectional area 705 includes but are not limited to (a) reduce water streamline cross-overs to allow a more streamline water stream exiting from the nozzle; (b) reduce turbulence in the incoming water stream; and (c) allow suitable diverging and converging angles to the final exit cross-section.
  • Figs. 22 and 23 show the cross-sections of nozzle 700.
  • the angle at which the incoming water stream converges to the transitional cross-section 705 is shown by the angles 706 and 708. This angle can vary from 5 degrees to 60 degrees.
  • the smaller angle of convergence prevents water streamlines from crossing over.
  • the advantage of a larger angle is that a larger angle allows creating more compact geometries.
  • the choice of convergence angle is a function of desired flow efficiency, manufacturing constraints and cost of the final product. In our optimization studies, it was determined that the most suitable angles to optimize between flow and cost were between 10 degrees and 30 degrees.
  • the water stream converges in one direction and diverges in the other angle. The convergence helps increase the velocity of the water stream.
  • the divergence helps create diverging stream patterns as the water stream exits the nozzle.
  • the transition from the transitional cross-sectional area 705 to the final cross-sectional area 702 is defined by the divergence angle 707 from the transitional area 705 to the final area 702 and the convergence angle 709 from the transitional area 705 to the final area 702.
  • the value of divergence angle 707 can vary from 0 degree to 60 degrees.
  • the value of convergence angle 709 can vary from 0 degree to 60 degrees.
  • the function of the divergence angle 707 is to create a water stream such that on exiting the nozzle, the stream has a diverging profile. The diverging profile of the water stream would allow continual increase in surface area of water stream and coverage.
  • the function of convergence angle is to provide an increase in velocity of the water stream by keeping the same or reducing the cross-sectional area from the transitional cross-section 705 to the final exit area.
  • the shape of the final cross-sectional area is such that the width is greater than the height.
  • This elongated geometry allows creating water streams with high surface area.
  • the elongated geometries can include, but are not limited to rectangular shapes like rectangles, rectangles with rounded edges and ellipses. All these geometries can be defined by their width and height.
  • the width of the final cross-sectional area 703 and its height 704 dictate the final flow rate and geometric attributes of the water stream as it exits the nozzle.
  • the width 703 can vary from 0.05” to 6” and height 704 can vary from 0.01” to 6”.
  • the net area as a function of 703 and 704 determines the final flow rate and that area can vary from the final cross-sectional area (CSA) determines the flow rate from the nozzle.
  • CSA final cross-sectional area
  • nozzle 700 is provided.
  • the nozzle inlet 701 can be directly attached to a hose or attached via use of a suitable adaptor or have another functional element between the hose and the nozzle like an on-off valve or a flow meter.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 3/8”, 1”, 1.5”, 2” or
  • the threads on the inlet section 701 can be male or female threads as per the requirement.
  • the type of thread does not impact of limit the functionality of the nozzle.
  • the exit 702 is designed such that as the water stream exits the nozzle, it forms a flat stream geometry.
  • the velocity of the stream is a function of the cross-sectional area (CSA) of the nozzle exit, whereas the external surface area is a function of perimeter of the water stream exiting the nozzle.
  • CSA cross-sectional area
  • perimeter of the water stream exiting the nozzle For any given geometric shape, a circle has the smaller ratio of perimeter to area. As compared to a circular geometry, a thin rectangle has significantly higher ratio of perimeter to area.
  • This ratio of the CSA and perimeter for a rectangular geometry is a direct function of the ratio of the width of the rectangle and its height. Higher is the ratio of width and height of the rectangle, also known as the aspect ratio of the rectangle, higher would be the ratio of its perimeter and area.
  • the width of the exiting water stream is determined by the width of the nozzle exit 703; the thickness of the water stream is determined by the height of the nozzle exit 704.
  • the nozzle 700 is designed such that the incoming water stream converges to a transitional cross-section 705 with a profile P and an area A.
  • This position of transitional cross-section 705 is such that it lies in between the nozzle inlet and the nozzle exit.
  • the profile P of the transitional area 705 can be a square, a square with rounded edges, an ellipse, or a circle.
  • the area A of the transitional cross-section is such that it is equal to or smaller than the inlet cross-section and it is equal to or greater than the exit cross-section.
  • this transitional area is critical. This transitional area also reduced the water streamlines cross-over.
  • transitional cross-sectional area 705 includes but are not limited to (a) reduce water streamline cross-overs to allow a more streamline water stream exiting from the nozzle; (b) reduce turbulence in the incoming water stream; and (c) allow suitable diverging and converging angles to the final exit cross-section.
  • the cross-sectional area is extended to have a length shown by 710 in figures 24 and 25.
  • the straight section 710 allows fluid streamlines to have an efficient transition from the converging to the diverging profile. This helps increase the range of the water stream.
  • the length of the straight section can be between 0.02” to 2”.
  • Figs. 22 and 23 show the cross-sections of the nozzle 700.
  • the angle at which the incoming water stream converges to the transitional cross-section 705 is shown by the angles 706 and 708. This angle can vary from 5 degrees to 60 degrees.
  • the smaller angle of convergence prevents water streamlines from crossing over.
  • the advantage of larger angle is that larger angle allows creating more compact geometries.
  • the choice of convergence angle is a function of desired flow efficiency, manufacturing constraints and cost of the final product. In our optimization studies it was determined that the most suitable angles to optimize between flow and cost were between 10 degrees and 30 degrees.
  • the water stream converges in one direction and diverges in the other angle. The convergence helps increase the velocity of water stream.
  • the divergence helps create diverging stream patterns as water stream exits the nozzle.
  • the transition from the transitional cross-sectional area 705 to the final cross-sectional area 702 is defined by the divergence angle 707 from the transitional area 705 to the final area 702 and the convergence angle 709 from the transitional area 705 to the final area 702.
  • the value of divergence angle 707 can vary from 0 degree to 60 degrees.
  • the value of convergence angle 709 can vary from 0 degree to 60 degrees.
  • the function of the divergence angle 707 is to create a water stream such that on exiting the nozzle, the stream has a diverging profile. The diverging profile of the water stream would allow continual increase in surface area of water stream and coverage.
  • the function of convergence angle is to provide increase in velocity of the water stream by keeping same or reducing the cross-sectional area from the transitional crosssection 705 to the final exit area.
  • the shape of the final cross-sectional area is such that the width is greater than the height.
  • This elongated geometry allows creating water streams with high surface area.
  • the elongated geometries can include, but are not limited to rectangles, rectangles with rounded edges and ellipses. All these geometries can be defined by their width and height.
  • the width of the final cross- sectional area 703 and its height 704 dictate the final flow rate and geometric attributes of the water stream as it exits the nozzle.
  • the width 703 can vary from 0.05” to 6” and height 704 can vary from 0.01” to 6”.
  • the net area as a function of 703 and 704 determines the final flow rate and that area can vary from the final cross-sectional area (CSA) determines the flow rate from the nozzle.
  • CSA final cross-sectional area
  • Fig. 26 provides another exemplary embodiment of the high-efficiency nozzle 700.
  • the nozzle inlet 701 can be directly attached to a hose or attached via use of a suitable adaptor or have another functional element between the hose and the nozzle like an on-off valve or a flow meter.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 3/8”, U”, 1”, 1.5”, 2” or 2.5”; or US garden hose sizes (NH) sizes 3/8”, U”, 1”, 1.5”, 2” or 2.5”; or US garden hose sizes (NH) sizes 3/8”, U”, 1”, 1.5”, 2” or 2.5”; or US garden hose sizes (NH) sizes 3/8”, U”, 1”, 1.5”, 2” or 2.5”; or US garden hose sizes (NH) sizes 3/8”, U”, 1”, 1.5”, 2” or 2.5”; or US garden hose sizes (
  • the threads on the inlet section 701 can be male or female threads as per the requirement.
  • the type of thread does not impact of limit the functionality of the nozzle.
  • the exit 702 is designed such that as the water stream exits the nozzle, it forms a flat stream geometry.
  • the velocity of the stream is a function of the cross-sectional area (CSA) of the nozzle exit, whereas the external surface area is a function of perimeter of the water stream exiting the nozzle.
  • CSA cross-sectional area
  • perimeter of the water stream exiting the nozzle For any given geometric shape, a circle has the smaller ratio of perimeter to area. As compared to a circular geometry, a thin rectangle has significantly higher ratio of perimeter to area.
  • This ratio of the CSA and perimeter for a rectangular geometry is a direct function of the ratio of the width of the rectangle and its height. Higher is the ratio of width and height of the rectangle, also known as the aspect ratio of the rectangle, higher would be the ratio of its perimeter and area.
  • the width of the exiting water stream is determined by the width of the nozzle exit 703; the thickness of the water stream is determined by the height of the nozzle exit 704.
  • the nozzle 700 is designed such that the incoming water stream converges to a transitional crosssection 705 with a profile P and an area A. This position of transitional cross-section 705 is such that it lies in between the nozzle inlet and the nozzle exit.
  • the profile P of the transitional area 705 can be a square, a square with rounded edges, an ellipse, or a circle.
  • the area A of the transitional cross-section is such that it is equal to or smaller than the inlet cross-section and it is equal to or greater than the exit cross-section.
  • this transitional area is critical. This transitional area also reduced the water streamlines cross-over.
  • transitional cross-sectional area 705 includes but are not limited to (a) reduce water streamline cross-overs to allow a more streamline water stream exiting from the nozzle; (b) reduce turbulence in the incoming water stream; and (c) allow suitable diverging and converging angles to the final exit cross-section.
  • the cross-sectional area can be extended to have a length shown by 710 in figures 24 and 25.
  • the straight section 710 allows fluid streamlines to have an efficient transition from the converging to diverging profile. This helps increase the range of the water stream.
  • the length of the straight section can be between 0.02” to 2”.
  • Figs. 22 and 23 show the cross-sections of the nozzle 700.
  • the angle at which the incoming water stream converges to the transitional cross-section 705 is shown by the angles 706 and 708. This angle can vary from 5 degrees to 60 degrees.
  • the smaller angle of convergence prevents water streamlines from crossing over.
  • the advantage of larger angle is that larger angle allows creating more compact geometries.
  • the choice of convergence angle is a function of desired flow efficiency, manufacturing constraints and cost of the final product. In our optimization studies it was determined that the most suitable angles to optimize between flow and cost were between 10 degrees and 30 degrees.
  • the water stream converges in one direction and diverges in the other angle. The convergence helps increase the velocity of water stream.
  • the divergence helps create diverging stream patterns as water stream exits the nozzle.
  • the transition from the transitional cross-sectional area 705 to the final cross-sectional area 702 is defined by the divergence angle 707 from the transitional area 705 to the final area 702 and the convergence angle 709 from the transitional area 705 to the final area 702.
  • the value of divergence angle 707 can vary from 0 degree to 60 degrees.
  • the value of convergence angle 709 can vary from 0 degree to 60 degrees.
  • the function of the divergence angle 707 is to create a water stream such that on exiting the nozzle, the stream has a diverging profile. The diverging profile of the water stream would allow continual increase in surface area of water stream and coverage.
  • the function of convergence angle is to provide increase in velocity of the water stream by keeping same or reducing the cross-sectional area from the transitional crosssection 705 to the final exit area.
  • the shape of the final cross-sectional area is such that the width is greater than the height.
  • This elongated geometry allows creating water streams with high surface area.
  • the elongated geometries can include, but are not limited to rectangles, rectangles with rounded edges and ellipses. All these geometries can be defined by their width and height.
  • the width of the final cross- sectional area 703 and its height 704 dictate the final flow rate and geometric attributes of the water stream as it exits the nozzle.
  • the width 703 can vary from 0.05” to 6” and height 704 can vary from 0.01” to 6”.
  • the final cross-sectional area (CSA) determines the flow rate from the nozzle.
  • the final cross-sectional area has an extended pathway shown by 711 in Fig. 26.
  • the elongated pathway allows better control of the diverging stream. It was determined via detailed experimentation that for design of manufacturing, to be able to get consistent diverging pattern can be challenging. Even a small change in the diverging angle 707 can have huge impact on the final geometry of the water stream.
  • the straight section 711 allows that the nozzles have less variations. This is critical for manufacturing in high volumes to achieve high consistency.
  • the length 712 of the straight section 711 can vary from 0 inch to 4 inches.
  • Figs. 27-28 provides another exemplary embodiment of the high efficiency nozzle 700.
  • the nozzle inlet 701 can be directly attached to a hose or attached via use of a suitable adaptor or have another functional element between the hose and the nozzle like an on-off valve or a flow meter.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 3/8”, U”, 1”, 1.5”, 2” or 2.5”; or US garden hose sizes (NH) sizes 3/8”, U”, 1”, 1.5”, 2” or 2.5”; or US garden hose sizes (NH) sizes 3/8”, U”, 1”, 1.5”, 2” or 2.5”; or US garden hose sizes (NH) sizes 3/8”, U”, 1”, 1.5”, 2” or 2.5”; or US garden hose sizes (NH) sizes 3/8”, U”, 1”, 1.5”, 2” or 2.5”; or US garden hose sizes (NH) sizes 3/8”, U”, 1”, 1.5”, 2” or 2.5”; or US
  • the threads on the inlet section 701 can be male or female threads as per the requirement.
  • the type of thread does not impact of limit the functionality of the nozzle.
  • the exit 702 is designed such that as the water stream exits the nozzle, it forms a flat stream geometry.
  • the velocity of the stream is a function of the cross-sectional area (CSA) of the nozzle exit, whereas the external surface area is a function of perimeter of the water stream exiting the nozzle.
  • CSA cross-sectional area
  • perimeter of the water stream exiting the nozzle For any given geometric shape, a circle has the smaller ratio of perimeter to area. As compared to a circular geometry, a thin rectangle has significantly higher ratio of perimeter to area.
  • This ratio of the CSA and perimeter for a rectangular geometry is a direct function of the ratio of the width of the rectangle and its height. Higher is the ratio of width and height of the rectangle, also known as the aspect ratio of the rectangle, higher would be the ratio of its perimeter and area.
  • the width of the exiting water stream is determined by the width of the nozzle exit 703; the thickness of the water stream is determined by the height of the nozzle exit 704.
  • the nozzle 700 is designed such that the incoming water stream converges to a transitional crosssection 705 with a profile P and an area A. This position of transitional cross-section 705 is such that it lies in between the nozzle inlet and the nozzle exit.
  • the profile P of the transitional area 705 can be a square, a square with rounded edges, an ellipse, or a circle.
  • the area A of the transitional cross-section is such that it is equal to or smaller than the inlet cross-section and it is equal to or greater than the exit cross-section.
  • this transitional area is critical. This transitional area also reduced the water streamlines cross-over.
  • transitional cross-sectional area 705 includes but are not limited to (a) reduce water streamline cross-overs to allow a more streamline water stream exiting from the nozzle; (b) reduce turbulence in the incoming water stream; and (c) allow suitable diverging and converging angles to the final exit cross-section.
  • the cross-sectional area can be extended to have a length shown by 710 in figures 24 and 25.
  • the straight section 710 allows fluid streamlines to have an efficient transition from the converging to diverging profile. This helps increase the range of the water stream.
  • the length of the straight section can be between 0.02” to 2”.
  • Figs. 22 and 23 show the cross-sections of the nozzle 700.
  • the angle at which the incoming water stream converges to the transitional cross-section 705 is shown by the angles 706 and 708. This angle can vary from 5 degrees to 60 degrees.
  • the smaller angle of convergence prevents water streamlines from crossing over.
  • the advantage of larger angle is that larger angle allows creating more compact geometries.
  • the choice of convergence angle is a function of desired flow efficiency, manufacturing constraints and cost of the final product. In our optimization studies it was determined that the most suitable angles to optimize between flow and cost were between 10 degrees and 30 degrees.
  • the water stream converges in one direction and diverges in the other angle. The convergence helps increase the velocity of water stream.
  • the divergence helps create diverging stream patterns as water stream exits the nozzle.
  • the transition from the transitional cross-sectional area 705 to the final cross-sectional area 702 is defined by the divergence angle 707 from the transitional area 705 to the final area 702 and the convergence angle 709 from the transitional area 705 to the final area 702.
  • the value of divergence angle 707 can vary from 0 degree to 60 degrees.
  • the value of convergence angle 709 can vary from 0 degree to 60 degrees.
  • the function of the divergence angle 707 is to create a water stream such that on exiting the nozzle, the stream has a diverging profile. The diverging profile of the water stream would allow continual increase in surface area of water stream and coverage.
  • the function of convergence angle is to provide increase in velocity of the water stream by keeping same or reducing the cross-sectional area from the transitional crosssection 705 to the final exit area.
  • the shape of the final cross-sectional area is such that the width is greater than the height.
  • This elongated geometry allows creating water streams with high surface area.
  • the elongated geometries can include, but are not limited to rectangles, rectangles with rounded edges and ellipses. All these geometries can be defined by their width and height.
  • the width of the final cross- sectional area 703 and its height 704 dictate the final flow rate and geometric attributes of the water stream as it exits the nozzle.
  • the width 703 can vary from 0.05” to 6” and height 704 can vary from 0.01” to 6”.
  • the final cross-sectional area (CSA) determines the flow rate from the nozzle.
  • the final cross-sectional area may have an extended pathway shown by 711 in Fig. 26.
  • the elongated pathway allows better control of the diverging stream. It was determined via detailed experimentation that for design of manufacturing, to be able to get consistent diverging pattern can be challenging. Even a small change in the diverging angle 707 can have huge impact on the final geometry of the water stream.
  • the straight section 711 allows that the nozzles have less variations. This is critical for manufacturing in high volumes to achieve high consistency.
  • the length 712 of the straight section 711 can vary from 0 inch to 4 inches.
  • the internal and external edges may have filets for ease of the manufacturing processes.
  • the filets are created for: (1) Manufacturing processes. It is not feasible to create completely squared edges and the cost of manufacturing to create such edges can be extremely high. Filets on the internal pathway allow reducing the manufacturing cost and do not impact the flow of the fluid through the nozzle pathway. (2) Reducing sharp edges: The exterior filets help create softer edges on the exterior of the nozzle. Sharp edges are not desirable on the exterior of the nozzle for safety of the nozzle operator. (3) Increasing robustness: Sharp edges have higher pressure concentration and may lead to formation of cracks and damage under stress. Filets help distribution of stresses over larger areas and reduce damage to the nozzle. The exterior filets are shown by 713 and interior filets are shown by 714.
  • Fig. 29 is illustrating one example of where the transitional region is circular, the present invention is applicable to and can be applied to all different embodiments as shown in the previous figures. More specifically, where the transitional region is circular, exemplary embodiments where the transition region length can vary from 0 to 4 inches or there could be a straight section at the end of the nozzle, and such alternative applications do not warrant or require additional illustration for understanding.
  • Fig 29 provides another exemplary embodiment of the high efficiency nozzle 700.
  • the nozzle inlet 701 can be directly attached to a hose or attached via use of a suitable adaptor or have another functional element between the hose and the nozzle like an on-off valve or a flow meter.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 3/8”, 1”, 1.5”, 2” or 2.5”; or US garden hose sizes (NH) sizes 3/8”, 1”, 1.5”, 2” or 2.5”; or US garden hose sizes (NH) sizes 3/8”, 1”, 1.5”, 2” or 2.5”; or US garden hose sizes (NH) sizes 3/8”, 1”, 1.5”, 2” or 2.5”; or US garden hose sizes (NH) sizes 3/8”, 1”, 1.5”, 2” or 2.5”; or US garden hose sizes (NH) sizes 3/8”, 1”, 1.5”, 2”
  • the threads on the inlet section 701 can be male or female threads as per the requirement.
  • the type of thread does not impact of limit the functionality of the nozzle.
  • the exit 702 is designed such that as the water stream exits the nozzle, it forms a flat stream geometry.
  • the velocity of the stream is a function of the cross-sectional area (CSA) of the nozzle exit, whereas the external surface area is a function of perimeter of the water stream exiting the nozzle.
  • CSA cross-sectional area
  • perimeter of the water stream exiting the nozzle For any given geometric shape, a circle has the smaller ratio of perimeter to area. As compared to a circular geometry, a thin rectangle has significantly higher ratio of perimeter to area.
  • This ratio of the CSA and perimeter for a rectangular geometry is a direct function of the ratio of the width of the rectangle and its height. Higher is the ratio of width and height of the rectangle, also known as the aspect ratio of the rectangle, higher would be the ratio of its perimeter and area.
  • the width of the exiting water stream is determined by the width of the nozzle exit 703; the thickness of the water stream is determined by the height of the nozzle exit 704.
  • the nozzle 700 is designed such that the incoming water stream converges to a transitional crosssection 705 with a profile P and an area A. This position of transitional cross-section 705 is such that it lies in between the nozzle inlet and the nozzle exit.
  • the profile P of the transitional area 705 is such that it has a circular profile.
  • the area A of the transitional cross-section is such that it is equal to or smaller than the inlet cross-section and it is equal to or greater than the exit cross-section.
  • this transitional area is critical. This transitional area also reduced the water streamlines cross-over.
  • transitional cross-sectional area 705 includes but are not limited to (a) reduce water streamline cross-overs to allow a more streamline water stream exiting from the nozzle; (b) reduce turbulence in the incoming water stream; and (c) allow suitable diverging and converging angles to the final exit cross-section.
  • the cross-sectional area can be extended to have a length shown by 710 in figures 24 and 25.
  • the straight section 710 allows fluid streamlines to have an efficient transition from the converging to diverging profile. This helps increase the range of the water stream.
  • the length of the straight section can be between 0.02” to 2”.
  • Figs. 22 and 23 show the cross-sections of the nozzle 700.
  • the angle at which the incoming water stream converges to the transitional cross-section 705 is shown by the angles 706 and 708. This angle can vary from 5 degrees to 60 degrees.
  • the smaller angle of convergence prevents water streamlines from crossing over.
  • the advantage of larger angle is that larger angle allows creating more compact geometries.
  • the choice of convergence angle is a function of desired flow efficiency, manufacturing constraints and cost of the final product. In our optimization studies it was determined that the most suitable angles to optimize between flow and cost were between 10 degrees and 30 degrees.
  • the convergence helps increase the velocity of water stream.
  • the divergence helps create diverging stream patterns as water stream exits the nozzle.
  • the transition from the transitional cross-sectional area 705 to the final cross-sectional area 702 is defined by the divergence angle 707 from the transitional area 705 to the final area 702 and the convergence angle 709 from the transitional area 705 to the final area 702.
  • the value of divergence angle 707 can vary from 0 degree to 60 degrees.
  • the value of convergence angle 709 can vary from 0 degree to 60 degrees.
  • the function of the divergence angle 707 is to create a water stream such that on exiting the nozzle, the stream has a diverging profile. The diverging profile of the water stream would allow continual increase in surface area of water stream and coverage. This increase in surface area of the water stream is critical for enhancing fire suppression rate.
  • the function of convergence angle is to provide increase in velocity of the water stream by keeping same or reducing the cross-sectional area from the transitional crosssection 705 to the final exit area.
  • the shape of the final cross-sectional area is such that the width is greater than the height.
  • This elongated geometry allows creating water streams with high surface area.
  • the elongated geometries can include, but are not limited to rectangles, rectangles with rounded edges and ellipses. All these geometries can be defined by their width and height.
  • the width of the final cross- sectional area 703 and its height 704 dictate the final flow rate and geometric attributes of the water stream as it exits the nozzle.
  • the width 703 can vary from 0.05” to 6” and height 704 can vary from 0.01” to 6”.
  • the final cross-sectional area (CSA) determines the flow rate from the nozzle.
  • the final cross-sectional area may have an extended pathway shown by 711 in Fig. 26.
  • the elongated pathway allows better control of the diverging stream. It was determined via detailed experimentation that for design of manufacturing, to be able to get consistent diverging pattern can be challenging. Even a small change in the diverging angle 707 can have huge impact on the final geometry of the water stream.
  • the straight section 711 allows that the nozzles have less variations. This is critical for manufacturing in high volumes to achieve high consistency.
  • the length 712 of the straight section 711 can vary from 0 inch to 4 inches.
  • the internal and external edges may have filets for ease of the manufacturing processes.
  • the filets are created for: (1) Manufacturing processes. It is not feasible to create completely squared edges and the cost of manufacturing to create such edges can be extremely high. Filets on the internal pathway allow reducing the manufacturing cost and do not impact the flow of the fluid through the nozzle pathway. (2) Reducing sharp edges: The exterior filets help create softer edges on the exterior of the nozzle. Sharp edges are not desirable on the exterior of the nozzle for safety of the nozzle operator. (3) Increasing robustness: Sharp edges have higher pressure concentration and may lead to formation of cracks and damage under stress. Filets help distribution of stresses over larger areas and reduce damage to the nozzle. The exterior filets are shown by 713 and interior filets are shown by 714.
  • FIGs 30-32 provide illustrations of high efficiency nozzle 800, in accordance with another exemplary embodiment of the current invention.
  • the nozzle 800 is designed such that the incoming water stream converges to a first transitional cross-section 803 with profile P-1 and area A-l, and a second transitional cross-section 804 with profile P-2 and area A-2.
  • This position of transitional cross-sections 803 and 804 is such that they he in between the nozzle inlet and the nozzle exit.
  • the position of transitional cross-section 803 is such that it is closer to the inlet of the nozzle.
  • the position of the transitional cross-section 804 is such that it is closer to the outlet of the nozzle.
  • the function of the transitional cross-sectional area 803 is to provide a profile shape that can minimize stream cross-overs as the cross-sectional area reduces.
  • transitional cross-sectional profile is a rectangle with a dimension of 2” by 0.1” and the transitional area 804 is a square with sides 0.2”x0.2”. Then going from a circle of diameter 1.5” to a square of sides 0.2” can introduce significant twist in water streamlines. This can impact the shape of the final geometry as it exits the nozzle. Based on detailed computational fluid dynamic simulations and experimental validations, it was discovered that to mitigate this challenge, another transitional crosssection 803 can be introduced. This transitional area 803 can be a square with sides 1” x 1”. The area of this l”xl” square is less than the area of 1.5” inlet but more than the second transitional cross-section 0.2”x0.2”.
  • transitional cross-section 804 include but are not limited to (a) reduce water streamline cross-overs to allow a more streamline water stream exiting from the nozzle; (b) reduce turbulence in the incoming water stream; and (c) allow suitable diverging and converging angles to the final exit cross-section.
  • the nozzle inlet 801 can be directly attached to a hose or attached via use of a suitable adaptor or have another functional element between the hose and the nozzle like an on-off valve or a flow meter.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 3/8”, 1”, 1.5”, 2” or 2.5”; or
  • the threads on the inlet section 801 can be male or female threads as per the requirement.
  • the type of thread does not impact of limit the functionality of the nozzle.
  • the exit 802 is designed such that as the water stream exits the nozzle, it forms a flat stream geometry.
  • the velocity of the stream is a function of the cross-sectional area (CSA) of the nozzle exit, whereas the external surface area is a function of perimeter of the water stream exiting the nozzle.
  • CSA cross-sectional area
  • perimeter of the water stream exiting the nozzle For any given geometric shape, a circle has the smaller ratio of perimeter to area. As compared to a circular geometry, a thin rectangle has significantly higher ratio of perimeter to area.
  • This ratio of the CSA and perimeter for a rectangular geometry is a direct function of the ratio of the width of the rectangle and its height. Higher is the ratio of width and height of the rectangle, also known as the aspect ratio of the rectangle, higher would be the ratio of its perimeter and area.
  • the width of the exiting water stream is determined by the width of the nozzle exit 805; the thickness of the water stream is determined by the height of the nozzle exit 806.
  • Figs. 31 and 32 show the cross-sections of nozzle 800.
  • the angle at which the water stream converges to the transitional cross-section 804 is shown by the angles 807 and 809. This angle can vary from 5 degrees to 60 degrees.
  • the smaller angle of convergence prevents water streamlines from crossing over.
  • the advantage of larger angle is that larger angle allows creating more compact geometries.
  • the choice of convergence angle is a function of desired flow efficiency, manufacturing constraints and cost of the final product. In our optimization studies it was determined that the most suitable angles to optimize between flow and cost were between 10 degrees and 30 degrees.
  • the transition from the transitional cross-sectional area 804 to the final cross-sectional area 802 is defined by the divergence angle 808 from the transitional area 804 to the final area 802 and the convergence angle 810 from the transitional area 804 to the final area 802.
  • the value of divergence angle 808 can vary from 0 degree to 60 degrees.
  • the value of convergence angle 810 can vary from 0 degree to 60 degrees.
  • the function of the divergence angle 808 is to create a water stream such that on exiting the nozzle, the stream has a diverging profile.
  • the diverging profile of the water stream would allow continual increase in surface area of water stream and coverage. This increase in surface area of the water stream is critical for enhancing fire suppression rate.
  • the function of convergence angle is to provide increase in velocity of the water stream by keeping same or reducing the cross-sectional area from the transitional cross-section 804 to the final exit area.
  • the shape of the final cross-sectional area is such that the width is greater than the height.
  • This elongated geometry allows creating water streams with high surface area.
  • the elongated geometries can include, but are not limited to rectangles, rectangles with rounded edges and ellipses. All these geometries can be defined by their width and height.
  • the width of the final cross-sectional area 805 and its height 806 dictate the final flow rate and geometric attributes of the water stream as it exits the nozzle.
  • the width 805 can vary from 0.05” to 6” and height 806 can vary from 0.01” to 6”.
  • the net area as a function of 805 and 806 determines the final flow rate and that area can vary from the final cross- sectional area (CSA) determines the flow rate from the nozzle.
  • CSA final cross- sectional area
  • FIGs 33-35 another exemplary embodiment of nozzle 800 is provided.
  • the nozzle 800 is designed such that the incoming water stream converges to a first transitional cross-section 803 with profile P-1 and area A-l, and a second transitional crosssection 804 with profile P-2 and area A-2.
  • This position of transitional cross-sections 803 and 804 is such that they lie in between the nozzle inlet and the nozzle exit.
  • the position of transitional cross-section 803 is such that it is closer to the inlet of the nozzle.
  • the position of the transitional cross-section 804 is such that it is closer to the outlet of the nozzle.
  • the function of the transitional cross-sectional area 803 is to provide a profile shape that can minimize stream cross-overs as the cross-sectional area reduces. It was discovered that as the cross-sectional profile changes from circular to square or rectangular, the surface of the flow pathway introduces a twist in the water streamlines. These twists can stay in the water stream as it exits the nozzle and create undesirable stream patterns. The challenge becomes more prominent as the ratio of the diameter of the inlet to the smallest dimension of the rectangle goes up. As an example, if the final cross-sectional profile is a rectangle with a dimension of 2” by 0.1” and the transitional area 804 is a square with sides 0.2”x0.2”.
  • transitional cross-section 803 can be introduced.
  • This transitional area 803 can be a square with sides 1” x 1”. The area of this l”xl” square is less than the area of 1.5” inlet but more than the second transitional cross-section 0.2”x0.2”. Going from a 1.5” circle to a square with side 1” does not introduce significant twist in the water streamlines.
  • the second transition that is from square with side 1” to square with side 0.2” is a square-to-square transition and does not introduce twisting in the water streamlines. Introducing an additional transitional crosssection allows improving the uniformity and shape of the exiting water stream.
  • transitional cross-section 804 include but are not limited to (a) reduce water streamline cross-overs to allow a more streamline water stream exiting from the nozzle; (b) reduce turbulence in the incoming water stream; and (c) allow suitable diverging and converging angles to the final exit cross-section.
  • the cross-sectional area is extended to have a length shown by 811 in figures 33 to 35.
  • the straight section 710 allows fluid streamlines to have an efficient transition from the converging to diverging profile. This helps increase the range of the water stream.
  • the length of the straight section can be between 0.02” to 2”.
  • the nozzle inlet 801 can be directly attached to a hose or attached via use of a suitable adaptor or have another functional element between the hose and the nozzle like an on-off valve or a flow meter.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 3/8”, 1”, 1.5”, 2” or 2.5”; or
  • the threads on the inlet section 801 can be male or female threads as per the requirement.
  • the type of thread does not impact of limit the functionality of the nozzle.
  • the exit 802 is designed such that as the water stream exits the nozzle, it forms a flat stream geometry.
  • the velocity of the stream is a function of the cross-sectional area (CSA) of the nozzle exit, whereas the external surface area is a function of perimeter of the water stream exiting the nozzle.
  • CSA cross-sectional area
  • perimeter of the water stream exiting the nozzle For any given geometric shape, a circle has the smaller ratio of perimeter to area. As compared to a circular geometry, a thin rectangle has significantly higher ratio of perimeter to area.
  • This ratio of the CSA and perimeter for a rectangular geometry is a direct function of the ratio of the width of the rectangle and its height. Higher is the ratio of width and height of the rectangle, also known as the aspect ratio of the rectangle, higher would be the ratio of its perimeter and area.
  • the width of the exiting water stream is determined by the width of the nozzle exit 805; the thickness of the water stream is determined by the height of the nozzle exit 806.
  • Figs. 31 and 32 show the cross-sections of nozzle 800.
  • the angle at which the water stream converges to the transitional cross-section 804 is shown by the angles 807 and 809. This angle can vary from 5 degrees to 60 degrees.
  • the smaller angle of convergence prevents water streamlines from crossing over.
  • the advantage of larger angle is that larger angle allows creating more compact geometries.
  • the choice of convergence angle is a function of desired flow efficiency, manufacturing constraints and cost of the final product. In our optimization studies it was determined that the most suitable angles to optimize between flow and cost were between 10 degrees and 30 degrees.
  • the water stream converges in one direction and diverges in the other angle. The convergence helps increase the velocity of water stream.
  • the divergence helps create diverging stream patterns as water stream exits the nozzle.
  • the transition from the transitional cross-sectional area 804 to the final cross-sectional area 802 is defined by the divergence angle 808 from the transitional area 804 to the final area 802 and the convergence angle 810 from the transitional area 804 to the final area 802.
  • the value of divergence angle 808 can vary from 0 degree to 60 degrees.
  • the value of convergence angle 810 can vary from 0 degree to 60 degrees.
  • the function of the divergence angle 808 is to create a water stream such that on exiting the nozzle, the stream has a diverging profile. The diverging profile of the water stream would allow continual increase in surface area of water stream and coverage.
  • the function of convergence angle is to provide increase in velocity of the water stream by keeping same or reducing the cross-sectional area from the transitional crosssection 804 to the final exit area.
  • the shape of the final cross-sectional area is such that the width is greater than the height.
  • This elongated geometry allows creating water streams with high surface area.
  • the elongated geometries can include, but are not limited to rectangles, rectangles with rounded edges and ellipses. All these geometries can be defined by their width and height.
  • the width of the final cross- sectional area 805 and its height 806 dictate the final flow rate and geometric attributes of the water stream as it exits the nozzle.
  • the width 805 can vary from 0.05” to 6” and height 806 can vary from 0.01” to 6”.
  • the net area as a function of 805 and 806 determines the final flow rate and that area can vary from the final cross-sectional area (CSA) determines the flow rate from the nozzle.
  • CSA final cross-sectional area
  • Fig. 36 provide illustrations of high efficiency nozzle 800, in accordance with another exemplary embodiment of the current invention.
  • the nozzle 800 is designed such that the incoming water stream converges to a first transitional cross-section 803 with profile P-1 and area A-l, and a second transitional cross-section 804 with profile P-2 and area A-2.
  • This position of transitional cross-sections 803 and 804 is such that they he in between the nozzle inlet and the nozzle exit.
  • the position of transitional cross-section 803 is such that it is closer to the inlet of the nozzle.
  • the position of the transitional cross-section 804 is such that it is closer to the outlet of the nozzle.
  • the function of the transitional cross-sectional area 803 is to provide a profile shape that can minimize stream cross-overs as the cross-sectional area reduces. It was discovered that as the cross-sectional profile changes from circular to square or rectangular, the surface of the flow pathway introduces a twist in the water streamlines. These twists can stay in the water stream as it exits the nozzle and create undesirable stream patterns. The challenge becomes more prominent as the ratio of the diameter of the inlet to the smallest dimension of the rectangle goes up. As an example, if the final cross-sectional profile is a rectangle with a dimension of 2” by 0.1” and the transitional area 804 is a square with sides 0.2”x0.2”.
  • transitional cross-section 803 can be introduced.
  • This transitional area 803 can be a square with sides 1” x 1”. The area of this l”xl” square is less than the area of 1.5” inlet but more than the second transitional cross-section 0.2”x0.2”. Going from a 1.5” circle to a square with side 1” does not introduce significant twist in the water streamlines.
  • the second transition that is from square with side 1” to square with side 0.2” is a square-to-square transition and does not introduce twisting in the water streamlines. Introducing an additional transitional cross-section allows improving the uniformity and shape of the exiting water stream.
  • transitional cross-section 804 include but are not limited to (a) reduce water streamline cross-overs to allow a more streamline water stream exiting from the nozzle; (b) reduce turbulence in the incoming water stream; and (c) allow suitable diverging and converging angles to the final exit cross-section.
  • the nozzle inlet 801 can be directly attached to a hose or attached via use of a suitable adaptor or have another functional element between the hose and the nozzle like an on-off valve or a flow meter.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 3/8”, 1”, 1.5”, 2” or 2.5”; or
  • the threads on the inlet section 801 can be male or female threads as per the requirement.
  • the type of thread does not impact of limit the functionality of the nozzle.
  • the exit 802 is designed such that as the water stream exits the nozzle, it forms a flat stream geometry.
  • the velocity of the stream is a function of the cross-sectional area (CSA) of the nozzle exit, whereas the external surface area is a function of perimeter of the water stream exiting the nozzle.
  • CSA cross-sectional area
  • perimeter of the water stream exiting the nozzle For any given geometric shape, a circle has the smaller ratio of perimeter to area. As compared to a circular geometry, a thin rectangle has significantly higher ratio of perimeter to area.
  • This ratio of the CSA and perimeter for a rectangular geometry is a direct function of the ratio of the width of the rectangle and its height. Higher is the ratio of width and height of the rectangle, also known as the aspect ratio of the rectangle, higher would be the ratio of its perimeter and area.
  • the width of the exiting water stream is determined by the width of the nozzle exit 805; the thickness of the water stream is determined by the height of the nozzle exit 806.
  • Figs. 31 and 32 show the cross-sections of nozzle 800.
  • the angle at which the water stream converges to the transitional cross-section 804 is shown by the angles 807 and 809. This angle can vary from 5 degrees to 60 degrees.
  • the smaller angle of convergence prevents water streamlines from crossing over.
  • the advantage of larger angle is that larger angle allows creating more compact geometries.
  • the choice of convergence angle is a function of desired flow efficiency, manufacturing constraints and cost of the final product. In our optimization studies it was determined that the most suitable angles to optimize between flow and cost were between 10 degrees and 30 degrees.
  • the water stream converges in one direction and diverges in the other angle. The convergence helps increase the velocity of water stream.
  • the divergence helps create diverging stream patterns as water stream exits the nozzle.
  • the transition from the transitional cross-sectional area 804 to the final cross-sectional area 802 is defined by the divergence angle 808 from the transitional area 804 to the final area 802 and the convergence angle 810 from the transitional area 804 to the final area 802.
  • the value of divergence angle 808 can vary from 0 degree to 60 degrees.
  • the value of convergence angle 810 can vary from 0 degree to 60 degrees.
  • the function of the divergence angle 808 is to create a water stream such that on exiting the nozzle, the stream has a diverging profile. The diverging profile of the water stream would allow continual increase in surface area of water stream and coverage.
  • the function of convergence angle is to provide increase in velocity of the water stream by keeping same or reducing the cross-sectional area from the transitional crosssection 804 to the final exit area.
  • the shape of the final cross-sectional area is such that the width is greater than the height.
  • This elongated geometry allows creating water streams with high surface area.
  • the elongated geometries can include, but are not limited to rectangles, rectangles with rounded edges and ellipses. All these geometries can be defined by their width and height.
  • the width of the final cross- sectional area 805 and its height 806 dictate the final flow rate and geometric attributes of the water stream as it exits the nozzle.
  • the width 805 can vary from 0.05” to 6” and height 806 can vary from 0.01” to 6”.
  • the net area as a function of 805 and 806 determines the final flow rate and that area can vary from the final cross-sectional area (CSA) determines the flow rate from the nozzle.
  • CSA final cross-sectional area
  • FIGs 33-35 another exemplary embodiment of nozzle 800 is provided.
  • the nozzle 800 is designed such that the incoming water stream converges to a first transitional cross-section 803 with profile P-1 and area A-l, and a second transitional crosssection 804 with profile P-2 and area A-2.
  • This position of transitional cross-sections 803 and 804 is such that they lie in between the nozzle inlet and the nozzle exit.
  • the position of transitional cross-section 803 is such that it is closer to the inlet of the nozzle.
  • the position of the transitional cross-section 804 is such that it is closer to the outlet of the nozzle.
  • the function of the transitional cross-sectional area 803 is to provide a profile shape that can minimize stream cross-overs as the cross-sectional area reduces. It was discovered that as the cross-sectional profile changes from circular to square or rectangular, the surface of the flow pathway introduces a twist in the water streamlines. These twists can stay in the water stream as it exits the nozzle and create undesirable stream patterns. The challenge becomes more prominent as the ratio of the diameter of the inlet to the smallest dimension of the rectangle goes up. As an example, if the final cross-sectional profile is a rectangle with a dimension of 2” by 0.1” and the transitional area 804 is a square with sides 0.2”x0.2”.
  • transitional cross-section 803 can be introduced.
  • This transitional area 803 can be a square with sides 1” x 1”. The area of this l”xl” square is less than the area of 1.5” inlet but more than the second transitional cross-section 0.2”x0.2”. Going from a 1.5” circle to a square with side 1” does not introduce significant twist in the water streamlines.
  • the second transition that is from square with side 1” to square with side 0.2” is a square-to-square transition and does not introduce twisting in the water streamlines. Introducing an additional transitional crosssection allows improving the uniformity and shape of the exiting water stream.
  • transitional cross-section 804 include but are not limited to (a) reduce water streamline cross-overs to allow a more streamline water stream exiting from the nozzle; (b) reduce turbulence in the incoming water stream; and (c) allow suitable diverging and converging angles to the final exit cross-section.
  • the cross-sectional area is extended to have a length shown by 811 in figures 33 to 35.
  • the straight section 811 allows fluid streamlines to have an efficient transition from the converging to diverging profile. This helps increase the range of the water stream.
  • the length of the straight section can be between 0.02” to 2”.
  • Figs 34 and 35 show the crosssection of the nozzle 800 with respect to the present embodiment.
  • the nozzle inlet 801 can be directly attached to a hose or attached via use of a suitable adaptor or have another functional element between the hose and the nozzle like an on-off valve or a flow meter.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 3/8”, 1”, 1.5”, 2” or 2.5”; or
  • the threads on the inlet section 801 can be male or female threads as per the requirement.
  • the type of thread does not impact of limit the functionality of the nozzle.
  • the exit 802 is designed such that as the water stream exits the nozzle, it forms a flat stream geometry.
  • the velocity of the stream is a function of the cross-sectional area (CSA) of the nozzle exit, whereas the external surface area is a function of perimeter of the water stream exiting the nozzle.
  • CSA cross-sectional area
  • perimeter of the water stream exiting the nozzle For any given geometric shape, a circle has the smaller ratio of perimeter to area. As compared to a circular geometry, a thin rectangle has significantly higher ratio of perimeter to area.
  • This ratio of the CSA and perimeter for a rectangular geometry is a direct function of the ratio of the width of the rectangle and its height. Higher is the ratio of width and height of the rectangle, also known as the aspect ratio of the rectangle, higher would be the ratio of its perimeter and area.
  • the width of the exiting water stream is determined by the width of the nozzle exit 805; the thickness of the water stream is determined by the height of the nozzle exit 806.
  • Figs. 31 and 32 show the cross-sections of nozzle 800.
  • the angle at which the water stream converges to the transitional cross-section 804 is shown by the angles 807 and 809. This angle can vary from 5 degrees to 60 degrees.
  • the smaller angle of convergence prevents water streamlines from crossing over.
  • the advantage of larger angle is that larger angle allows creating more compact geometries.
  • the choice of convergence angle is a function of desired flow efficiency, manufacturing constraints and cost of the final product. In our optimization studies it was determined that the most suitable angles to optimize between flow and cost were between 10 degrees and 30 degrees.
  • the water stream converges in one direction and diverges in the other angle. The convergence helps increase the velocity of water stream.
  • the divergence helps create diverging stream patterns as water stream exits the nozzle.
  • the transition from the transitional cross-sectional area 804 to the final cross-sectional area 802 is defined by the divergence angle 808 from the transitional area 804 to the final area 802 and the convergence angle 810 from the transitional area 804 to the final area 802.
  • the value of divergence angle 808 can vary from 0 degree to 60 degrees.
  • the value of convergence angle 810 can vary from 0 degree to 60 degrees.
  • the function of the divergence angle 808 is to create a water stream such that on exiting the nozzle, the stream has a diverging profile. The diverging profile of the water stream would allow continual increase in surface area of water stream and coverage.
  • the function of convergence angle is to provide increase in velocity of the water stream by keeping same or reducing the cross-sectional area from the transitional crosssection 804 to the final exit area.
  • the shape of the final cross-sectional area is such that the width is greater than the height.
  • This elongated geometry allows creating water streams with high surface area.
  • the elongated geometries can include, but are not limited to rectangles, rectangles with rounded edges and ellipses. All these geometries can be defined by their width and height.
  • the width of the final cross- sectional area 805 and its height 806 dictate the final flow rate and geometric attributes of the water stream as it exits the nozzle.
  • the width 805 can vary from 0.05” to 6” and height 806 can vary from 0.01” to 6”.
  • the net area as a function of 805 and 806 determines the final flow rate and that area can vary from the final cross-sectional area (CSA) determines the flow rate from the nozzle.
  • CSA final cross-sectional area
  • nozzle 800 is designed such that the incoming water stream converges to a first transitional cross-section 803 with profile P-1 and area A-l, and a second transitional cross-section 804 with profile P-2 and area A-2.
  • This position of transitional cross-sections 803 and 804 is such that they lie in between the nozzle inlet and the nozzle exit.
  • the position of transitional cross-section 803 is such that it is closer to the inlet of the nozzle.
  • the position of the transitional cross-section 804 is such that it is closer to the outlet of the nozzle.
  • the function of the transitional cross-sectional area 803 is to provide a profile shape that can minimize stream cross-overs as the cross-sectional area reduces. It was discovered that as the cross-sectional profile changes from circular to square or rectangular, the surface of the flow pathway introduces a twist in the water streamlines. These twists can stay in the water stream as it exits the nozzle and create undesirable stream patterns. The challenge becomes more prominent as the ratio of the diameter of the inlet to the smallest dimension of the rectangle goes up. As an example, if the final cross-sectional profile is a rectangle with a dimension of 2” by 0.1” and the transitional area 804 is a square with sides 0.2”x0.2”.
  • transitional cross-section 803 can be introduced.
  • This transitional area 803 can be a square with sides 1” x 1”. The area of this l”xl” square is less than the area of 1.5” inlet but more than the second transitional cross-section 0.2”x0.2”. Going from a 1.5” circle to a square with side 1” does not introduce significant twist in the water streamlines.
  • the second transition that is from square with side 1” to square with side 0.2” is a square-to-square transition and does not introduce twisting in the water streamlines. Introducing an additional transitional crosssection allows improving the uniformity and shape of the exiting water stream.
  • transitional cross-section 804 include but are not limited to (a) reduce water streamline cross-overs to allow a more streamline water stream exiting from the nozzle; (b) reduce turbulence in the incoming water stream; and (c) allow suitable diverging and converging angles to the final exit cross-section.
  • the cross-sectional area is extended to have a length shown by 811 in figures 33 to 35.
  • the straight section 811 allows fluid streamlines to have an efficient transition from the converging to diverging profile. This helps increase the range of the water stream.
  • the length of the straight section can be between 0.02” to 2”.
  • Figs 34 and 35 show the crosssection of the nozzle 800 with respect to the present embodiment.
  • the nozzle inlet 801 can be directly attached to a hose or attached via use of a suitable adaptor or have another functional element between the hose and the nozzle like an on-off valve or a flow meter.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 3/8”, 1”, 1.5”, 2” or 2.5”; or
  • the threads on the inlet section 801 can be male or female threads as per the requirement.
  • the type of thread does not impact of limit the functionality of the nozzle.
  • the exit 802 is designed such that as the water stream exits the nozzle, it forms a flat stream geometry.
  • the velocity of the stream is a function of the cross-sectional area (CSA) of the nozzle exit, whereas the external surface area is a function of perimeter of the water stream exiting the nozzle.
  • CSA cross-sectional area
  • perimeter of the water stream exiting the nozzle For any given geometric shape, a circle has the smaller ratio of perimeter to area. As compared to a circular geometry, a thin rectangle has significantly higher ratio of perimeter to area.
  • This ratio of the CSA and perimeter for a rectangular geometry is a direct function of the ratio of the width of the rectangle and its height. Higher is the ratio of width and height of the rectangle, also known as the aspect ratio of the rectangle, higher would be the ratio of its perimeter and area.
  • the width of the exiting water stream is determined by the width of the nozzle exit 805; the thickness of the water stream is determined by the height of the nozzle exit 806.
  • Figs. 31 and 32 show the cross-sections of nozzle 800.
  • the angle at which the water stream converges to the transitional cross-section 804 is shown by the angles 807 and 809. This angle can vary from 5 degrees to 60 degrees.
  • the smaller angle of convergence prevents water streamlines from crossing over.
  • the advantage of larger angle is that larger angle allows creating more compact geometries.
  • the choice of convergence angle is a function of desired flow efficiency, manufacturing constraints and cost of the final product. In our optimization studies it was determined that the most suitable angles to optimize between flow and cost were between 10 degrees and 30 degrees.
  • the water stream converges in one direction and diverges in the other angle. The convergence helps increase the velocity of water stream.
  • the divergence helps create diverging stream patterns as water stream exits the nozzle.
  • the transition from the transitional cross-sectional area 804 to the final cross-sectional area 802 is defined by the divergence angle 808 from the transitional area 804 to the final area 802 and the convergence angle 810 from the transitional area 804 to the final area 802.
  • the value of divergence angle 808 can vary from 0 degree to 60 degrees.
  • the value of convergence angle 810 can vary from 0 degree to 60 degrees.
  • the function of the divergence angle 808 is to create a water stream such that on exiting the nozzle, the stream has a diverging profile. The diverging profile of the water stream would allow continual increase in surface area of water stream and coverage.
  • the function of convergence angle is to provide increase in velocity of the water stream by keeping same or reducing the cross-sectional area from the transitional cross- section 804 to the final exit area.
  • the shape of the final cross-sectional area is such that the width is greater than the height.
  • This elongated geometry allows creating water streams with high surface area.
  • the elongated geometries can include, but are not limited to rectangles, rectangles with rounded edges and ellipses. All these geometries can be defined by their width and height.
  • the width of the final cross- sectional area 805 and its height 806 dictate the final flow rate and geometric attributes of the water stream as it exits the nozzle.
  • the width 805 can vary from 0.05” to 6” and height 806 can vary from 0.01” to 6”.
  • the net area as a function of 805 and 806 determines the final flow rate and that area can vary from the final cross-sectional area (CSA) determines the flow rate from the nozzle.
  • CSA final cross-sectional area
  • the final cross-sectional area may have an extended pathway shown by 812 in Fig. 36.
  • the elongated pathway allows better control of the diverging stream. It was determined via detailed experimentation that for design of manufacturing, to be able to get consistent diverging pattern can be challenging. Even a small change in the diverging angle 808 can have huge impact on the final geometry of the water stream.
  • the straight section 812 allows that the nozzles have less variations. This is critical for manufacturing in high volumes to achieve high consistency.
  • the length 813 of the straight section 812 can vary from 0 inch to 4 inches.
  • nozzle 800 is designed such that the incoming water stream converges to a first transitional cross-section 803 with profile P-1 and area A-l, and a second transitional cross-section 804 with profile P-2 and area A-2.
  • This position of transitional cross-sections 803 and 804 is such that they lie in between the nozzle inlet and the nozzle exit.
  • the position of transitional cross-section 803 is such that it is closer to the inlet of the nozzle.
  • the position of the transitional cross-section 804 is such that it is closer to the outlet of the nozzle.
  • the function of the transitional cross-sectional area 803 is to provide a profile shape that can minimize stream cross-overs as the cross-sectional area reduces. It was discovered that as the cross-sectional profile changes from circular to square or rectangular, the surface of the flow pathway introduces a twist in the water streamlines. These twists can stay in the water stream as it exits the nozzle and create undesirable stream patterns. The challenge becomes more prominent as the ratio of the diameter of the inlet to the smallest dimension of the rectangle goes up. As an example, if the final cross-sectional profile is a rectangle with a dimension of 2” by 0.1” and the transitional area 804 is a square with sides 0.2”x0.2”.
  • transitional cross-section 803 can be introduced.
  • This transitional area 803 can be a square with sides 1” x 1”. The area of this l”xl” square is less than the area of 1.5” inlet but more than the second transitional cross-section 0.2”x0.2”. Going from a 1.5” circle to a square with side 1” does not introduce significant twist in the water streamlines.
  • the second transition that is from square with side 1” to square with side 0.2” is a square-to-square transition and does not introduce twisting in the water streamlines. Introducing an additional transitional crosssection allows improving the uniformity and shape of the exiting water stream.
  • transitional cross-section 804 include but are not limited to (a) reduce water streamline cross-overs to allow a more streamline water stream exiting from the nozzle; (b) reduce turbulence in the incoming water stream; and (c) allow suitable diverging and converging angles to the final exit cross-section.
  • the cross-sectional area is extended to have a length shown by 811 in figures 33 to 35.
  • the straight section 811 allows fluid streamlines to have an efficient transition from the converging to diverging profile. This helps increase the range of the water stream.
  • the length of the straight section can be between 0.02” to 2”.
  • Figs 34 and 35 show the crosssection of the nozzle 800 with respect to the present embodiment.
  • the nozzle inlet 801 can be directly attached to a hose or attached via use of a suitable adaptor or have another functional element between the hose and the nozzle like an on-off valve or a flow meter.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 3/8”, 1”, 1.5”, 2” or 2.5”; or
  • the threads on the inlet section 801 can be male or female threads as per the requirement.
  • the type of thread does not impact of limit the functionality of the nozzle.
  • the exit 802 is designed such that as the water stream exits the nozzle, it forms a flat stream geometry.
  • the velocity of the stream is a function of the cross-sectional area (CSA) of the nozzle exit, whereas the external surface area is a function of perimeter of the water stream exiting the nozzle.
  • CSA cross-sectional area
  • the external surface area is a function of perimeter of the water stream exiting the nozzle.
  • CSA cross-sectional area
  • CSA cross-sectional area
  • perimeter of the water stream exiting the nozzle For any given geometric shape, a circle has the smaller ratio of perimeter to area. As compared to a circular geometry, a thin rectangle has significantly higher ratio of perimeter to area.
  • This ratio of the CSA and perimeter for a rectangular geometry is a direct function of the ratio of the width of the rectangle and its height. Higher is the
  • the width of the exiting water stream is determined by the width of the nozzle exit 805; the thickness of the water stream is determined by the height of the nozzle exit 806.
  • Figs. 31 and 32 show the cross-sections of nozzle 800.
  • the angle at which the water stream converges to the transitional cross-section 804 is shown by the angles 807 and 809. This angle can vary from 5 degrees to 60 degrees.
  • the smaller angle of convergence prevents water streamlines from crossing over.
  • the advantage of larger angle is that larger angle allows creating more compact geometries.
  • the choice of convergence angle is a function of desired flow efficiency, manufacturing constraints and cost of the final product. In our optimization studies it was determined that the most suitable angles to optimize between flow and cost were between 10 degrees and 30 degrees.
  • the water stream converges in one direction and diverges in the other angle. The convergence helps increase the velocity of water stream.
  • the divergence helps create diverging stream patterns as water stream exits the nozzle.
  • the transition from the transitional cross-sectional area 804 to the final cross-sectional area 802 is defined by the divergence angle 808 from the transitional area 804 to the final area 802 and the convergence angle 810 from the transitional area 804 to the final area 802.
  • the value of divergence angle 808 can vary from 0 degree to 60 degrees.
  • the value of convergence angle 810 can vary from 0 degree to 60 degrees.
  • the function of the divergence angle 808 is to create a water stream such that on exiting the nozzle, the stream has a diverging profile. The diverging profile of the water stream would allow continual increase in surface area of water stream and coverage.
  • the function of convergence angle is to provide increase in velocity of the water stream by keeping same or reducing the cross-sectional area from the transitional crosssection 804 to the final exit area.
  • the shape of the final cross-sectional area is such that the width is greater than the height.
  • This elongated geometry allows creating water streams with high surface area.
  • the elongated geometries can include, but are not limited to rectangles, rectangles with rounded edges and ellipses. All these geometries can be defined by their width and height.
  • the width of the final cross- sectional area 805 and its height 806 dictate the final flow rate and geometric attributes of the water stream as it exits the nozzle.
  • the width 805 can vary from 0.05” to 6” and height 806 can vary from 0.01” to 6”.
  • the net area as a function of 805 and 806 determines the final flow rate and that area can vary from the final cross-sectional area (CSA) determines the flow rate from the nozzle.
  • CSA final cross-sectional area
  • the final cross-sectional area may have an extended pathway shown by 812 in Fig. 36.
  • the elongated pathway allows better control of the diverging stream. It was determined via detailed experimentation that for design of manufacturing, to be able to get consistent diverging pattern can be challenging. Even a small change in the diverging angle 808 can have huge impact on the final geometry of the water stream.
  • the straight section 812 allows that the nozzles have less variations. This is critical for manufacturing in high volumes to achieve high consistency.
  • the length 813 of the straight section 812 can vary from 0 inch to 4 inches.
  • the internal and external edges may have filets for ease of the manufacturing processes.
  • the filets are created for: (1) Manufacturing processes. It is not feasible to create completely squared edges and the cost of manufacturing to create such edges can be extremely high. Filets on the internal pathway allow reducing the manufacturing cost and do not impact the flow of the fluid through the nozzle pathway. (2) Reducing sharp edges: The exterior filets help create softer edges on the exterior of the nozzle. Sharp edges are not desirable on the exterior of the nozzle for safety of the nozzle operator. (3) Increasing robustness: Sharp edges have higher pressure concentration and may lead to formation of cracks and damage under stress. Filets help distribution of stresses over larger areas and reduce damage to the nozzle. The exterior filets are shown by 814 and interior filets are shown by 815.
  • nozzle 800 With respect to Figs 39-41 another exemplary embodiment of nozzle 800 is provided.
  • the nozzle 900 is designed such that the incoming water stream converges to a first transitional cross-section 903 with profile P and area A.
  • This position of transitional cross-sections 903 is such that it lies in between the nozzle inlet and the nozzle exit.
  • the profile of the transitional cross- sectional area 903 is elliptical.
  • transitional cross-section 903 include but are not limited to (a) reduce water streamline cross-overs to allow a more streamline water stream exiting from the nozzle; (b) reduce turbulence in the incoming water stream; and (c) allow suitable diverging and converging angles to the final exit cross-section.
  • the cross-sectional area may be extended to allow fluid streamlines to have an efficient transition from the converging to diverging profile. This helps increase the range of the water stream.
  • the length of the straight section can be between 0.02” to 2”.
  • the nozzle inlet 901 can be directly attached to a hose or attached via use of a suitable adaptor or have another functional element between the hose and the nozzle like an on-off valve or a flow meter.
  • the method of attachment should not impact the primary functionality of the nozzle.
  • the key functionality is derived from the design of the nozzle and the nozzle can be scaled to fit hoses of various sizes, including but not limited to National Hose (NH) sizes 3/8”, 1”, 1.5”, 2” or 2.5”; or
  • the threads on the inlet section 801 can be male or female threads as per the requirement.
  • the type of thread does not impact of limit the functionality of the nozzle.
  • the exit 802 is designed such that as the water stream exits the nozzle, it forms a flat stream geometry.
  • the velocity of the stream is a function of the cross-sectional area (CSA) of the nozzle exit, whereas the external surface area is a function of perimeter of the water stream exiting the nozzle.
  • CSA cross-sectional area
  • the external surface area is a function of perimeter of the water stream exiting the nozzle.
  • CSA cross-sectional area
  • a circle has the smaller ratio of perimeter to area.
  • an extended ellipse has significantly higher ratio of perimeter to area.
  • This ratio of the CSA and perimeter for an elliptical geometry is a direct function of the ratio of the width of the major and the minor axis of the ellipse. Higher is the ratio of major and minor axis of the ellipse, also known as the aspect ratio of the ellipse, higher would be the ratio of its perimeter and area.
  • the width of the exiting water stream is determined by the width of the nozzle exit 905; the thickness of the water stream is determined by the height of the nozzle exit 906.
  • Figs. 40 and 41 show the cross-sections of nozzle 900.
  • the angle at which the water stream converges is shown by the angles 907. This angle can vary from 5 degrees to 60 degrees.
  • the smaller angle of convergence prevents water streamlines from crossing over.
  • the advantage of larger angle is that larger angle allows creating more compact geometries.
  • the choice of convergence angle is a function of desired flow efficiency, manufacturing constraints and cost of the final product. In our optimization studies it was determined that the most suitable angles to optimize between flow and cost were between 10 degrees and 30 degrees.
  • the convergence helps increase the velocity of water stream.
  • the divergence helps create diverging stream patterns as water stream exits the nozzle.
  • the transition from the transitional cross-sectional area to the final cross-sectional area is defined by the divergence angle 908.
  • the value of divergence angle 908 can vary from 0 degree to 60 degrees.
  • the function of the divergence angle 908 is to create a water stream such that on exiting the nozzle, the stream has a diverging profile.
  • the diverging profile of the water stream would allow continual increase in surface area of water stream and coverage. This increase in surface area of the water stream is critical for enhancing fire suppression rate.
  • the function of convergence angle is to provide increase in velocity of the water stream by keeping same or reducing the cross-sectional area.
  • the shape of the final cross-sectional area is such that the width is greater than the height. This elongated geometry allows creating water streams with high surface area.
  • the width of the final cross-sectional area 905 and its height 906 dictate the final flow rate and geometric attributes of the water stream as it exits the nozzle.
  • the width 905 can vary from 0.05” to 6” and height 906 can vary from 0.01” to 6”.
  • the final cross-sectional area (CSA) determines the flow rate from the nozzle.
  • the final cross-sectional area may have an extended pathway.
  • the elongated pathway allows better control of the diverging stream. It was determined via detailed experimentation that for design of manufacturing, to be able to get consistent diverging pattern can be challenging. Even a small change in the diverging angle 908 can have huge impact on the final geometry of the water stream.
  • the straight section allows that the nozzles have less variations. This is critical for manufacturing in high volumes to achieve high consistency.
  • the length of the straight section 812 can vary from 0 inch to 4 inches.
  • the internal and external edges may have filets for ease of the manufacturing processes.
  • the filets are created for: (1) Manufacturing processes. It is not feasible to create completely squared edges and the cost of manufacturing to create such edges can be extremely high. Filets on the internal pathway allow reducing the manufacturing cost and do not impact the flow of the fluid through the nozzle pathway. (2) Reducing sharp edges: The exterior filets help create softer edges on the exterior of the nozzle. Sharp edges are not desirable on the exterior of the nozzle for safety of the nozzle operator. (3) Increasing robustness: Sharp edges have higher pressure concentration and may lead to formation of cracks and damage under stress. Filets help distribution of stresses over larger areas and reduce damage to the nozzle.
  • the threads can have suitable size as per requirements, for example the threads could be male or female threads with sizes including but not limited to 0.75” NST, 1” 1.5” NST, 2.5” NST.
  • the threads could also be based on systems including but not limited to NPT, NPSH or similar threads.
  • the functionality of the system is independent of the size and similar systems can be employed for various sizes.
  • These nozzle design can a variety of add-ons, including but not limited to a grip or a handle and an on-off valve.
  • the wall thickness of the nozzle can vary depending on the pressure rating and type of material used and does not impact the functionality of the various exemplary embodiments listed in the present invention.
  • the nozzle can be manufactured using a variety of materials including but not limited to metals like aluminum and brass or with high strength polymers and various composite materials.
  • the nozzles can be manufactured via multiple techniques, including but not limited to casting, injection molding, 3D printing or CNC machining.
  • the various embodiments can also be manufactured as a single component or it can be manufactured as multiple components that are attached together using a suitable attaching methodology, including but not limited to threads, screws, adhesives, welding, and suitable fasteners. As such the choice of manufacturing technique does not impact the functionality of the nozzles as described in various exemplary embodiments in the present disclosure.
  • a suitable metal alloy for high efficiency nozzles is Aluminum alloy 356. If 3D printed, the nozzle can be 3D printed using polymers including but not limited to ABS and PLA.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Nozzles (AREA)

Abstract

Une buse à haute efficacité est conçue. La buse assure des jets d'eau à longue portée et présentant une grande surface dans un système. Des transitions appropriées dans les trajets de fluide permettent de créer des jets d'eau qui présentent un profil d'écoulement robuste. Le système assure une perte d'énergie minimale tout en optimisant la vitesse et la surface. De telles buses peuvent être utilisées pour une variété d'applications comprenant entre autres l'extinction des incendies, le lavage à la pression, l'arrosage et d'autres applications semblables.
PCT/US2021/038393 2019-07-30 2021-06-22 Buse à intérieur lisse à haute efficacité WO2022119601A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
CA3200926A CA3200926A1 (fr) 2020-12-05 2021-06-22 Buse a interieur lisse a haute efficacite
AU2021390427A AU2021390427A1 (en) 2020-12-05 2021-06-22 High-efficiency smooth bore nozzles
US17/569,821 US20220176177A1 (en) 2019-07-30 2022-01-06 Adjustable nozzle and method of operation
PCT/US2022/012242 WO2022271203A1 (fr) 2021-06-22 2022-01-13 Buse réglable et procédé de fonctionnement
PCT/US2022/030833 WO2022271389A1 (fr) 2021-06-22 2022-05-25 Buse à pulvérisation réglable
AU2022300109A AU2022300109A1 (en) 2021-06-22 2022-05-25 Nozzle with adjustable spray
PCT/US2022/030831 WO2022271388A1 (fr) 2021-06-22 2022-05-25 Buse à alésage lisse
CA3223691A CA3223691A1 (fr) 2021-06-22 2022-05-25 Buse a pulverisation reglable
US17/828,093 US20220296943A1 (en) 2019-07-30 2022-05-31 Nozzle with adjustable spray

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US17/112,993 US11779938B2 (en) 2019-07-30 2020-12-05 High-efficiency smooth bore nozzles
US17/112,990 2020-12-05
US17/112,990 US20210086006A1 (en) 2019-07-30 2020-12-05 High-Efficiency Smooth Bore Nozzles
US17/112,993 2020-12-05

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
US17/112,990 Continuation US20210086006A1 (en) 2019-07-30 2020-12-05 High-Efficiency Smooth Bore Nozzles
US17/112,993 Continuation US11779938B2 (en) 2019-07-30 2020-12-05 High-efficiency smooth bore nozzles

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US201916595218A Continuation-In-Part 2019-07-30 2019-10-07

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WO2022119601A1 true WO2022119601A1 (fr) 2022-06-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114870308A (zh) * 2022-06-21 2022-08-09 长安大学 一种可调节雾化粒径和范围的撞击式喷嘴

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1106212A1 (fr) * 1999-12-07 2001-06-13 Pok Lance à incendie
WO2017195939A1 (fr) * 2016-05-10 2017-11-16 육송(주) Lance à jet brouillard pour la lutte contre l'incendie
CN105498134B (zh) * 2016-01-21 2018-09-28 捷达消防科技（苏州）股份有限公司 具有锐流功能的消防车用的喷射炮炮头装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1106212A1 (fr) * 1999-12-07 2001-06-13 Pok Lance à incendie
CN105498134B (zh) * 2016-01-21 2018-09-28 捷达消防科技（苏州）股份有限公司 具有锐流功能的消防车用的喷射炮炮头装置
WO2017195939A1 (fr) * 2016-05-10 2017-11-16 육송(주) Lance à jet brouillard pour la lutte contre l'incendie

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114870308A (zh) * 2022-06-21 2022-08-09 长安大学 一种可调节雾化粒径和范围的撞击式喷嘴
CN114870308B (zh) * 2022-06-21 2023-08-08 长安大学 一种可调节雾化粒径和范围的撞击式喷嘴

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