WO2013178853A2 - Tuyère fixe symétrique d'accélération pour vaisseaux aquatiques en condition de navigation libre - Google Patents

Tuyère fixe symétrique d'accélération pour vaisseaux aquatiques en condition de navigation libre Download PDF

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Publication number
WO2013178853A2
WO2013178853A2 PCT/ES2013/070341 ES2013070341W WO2013178853A2 WO 2013178853 A2 WO2013178853 A2 WO 2013178853A2 ES 2013070341 W ES2013070341 W ES 2013070341W WO 2013178853 A2 WO2013178853 A2 WO 2013178853A2
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
propeller
edge
profile
watercraft
Prior art date
Application number
PCT/ES2013/070341
Other languages
English (en)
Spanish (es)
Other versions
WO2013178853A3 (fr
Inventor
Juan José ROMERO VÁZQUEZ
Original Assignee
Romero Vazquez Juan Jose
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 ES201200572A external-priority patent/ES2385994B2/es
Application filed by Romero Vazquez Juan Jose filed Critical Romero Vazquez Juan Jose
Publication of WO2013178853A2 publication Critical patent/WO2013178853A2/fr
Publication of WO2013178853A3 publication Critical patent/WO2013178853A3/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/14—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in non-rotating ducts or rings, e.g. adjustable for steering purpose
    • B63H5/15—Nozzles, e.g. Kort-type

Definitions

  • the invention relates to a fixed symmetrical accelerator nozzle for watercraft in free navigation condition, forming part of the propulsion system of floating or underwater watercraft.
  • Free navigation condition when sailing with exclusively indoor cargo; in this condition the load index C T has a value between 1.5 and 3 in cruising speed at 80% of the nominal power.
  • Trawling or shooting navigation condition when sailing by pulling a fishing net or towing to another ship; in this case the speed of the ship is very small in relation to the thrust or shot of the propulsive system constituted by an open propeller or by a nozzle propeller, it is said that the propulsive system is very loaded, the load index C T is by above value 4; Only fishing trawlers and tugboats navigate in this condition when they are doing their specific job.
  • Propeller thrust coefficient ⁇ T p / T, where T p is the thrust exerted by the propeller only and T the thrust exerted by the propeller-nozzle assembly. In the open propeller (without nozzle) it is worth 1, in accelerating nozzles less than 1 and in decelerating nozzles more than 1.
  • a liquid vein when a liquid is driven by a propeller, in the case at hand, inside the same liquid, differentiating itself from the rest of the same liquid that surrounds the vein by its kinematic characteristics, both downstream of the propeller over everything, like upstream of the propeller.
  • a naval propeller generates, in a certain direction, an effective wake speed downstream with axial, tangential and radial components.
  • the axial component is the most important in terms of module.
  • Angle of attack of a profile is the one that forms the line that contains the rope with the general direction of the fluid that falls on said profile.
  • Codaste continuation of the keel of the watercraft by stern, both in floating ships and in submarine ships.
  • Ae refers to the total surface of the blades and Ao refers to the area of the scanning disc.
  • the nozzle ⁇ 9 ⁇ "developed by" MARIN “(" Maritime Research Institute Netherlands ”) is used in the 1960s, the nozzle" HR “commercialized by the company” Wártsilá “in the 1990s, and the nozzle” Rice speed "marketed by the" Rice Group "company of Mexico in the 1990s; in all of them the L / D ratio is very about 0.50; the line containing the rope of each profile intersects the axis of symmetry of the nozzle downstream of it; the difference between the outer radius of the nozzle and the inner radius is approximately 0.10D in the three nozzles cited; the outer surface is not cylindrical in any of them.
  • the rounded leading edge has a radius of curvature in profile of 0.0141 D for ⁇ 9 ⁇ "and 0.0216D for” HR ";
  • the sweeping plane from the center of the blade tips of the propeller perpendicular to the axis of symmetry of the nozzle is at the same distance from the entrance edge of the nozzle as from the exit edge of the nozzle; in profile the line tangent to the convergent convex interior surface at 0.046L downstream of the inlet edge it forms an angle with the axis of symmetry of the nozzle greater than 34 e at the "HR” and "Rice speed” nozzles and greater than 40 e at the nozzle "19A”.
  • the nozzles that are currently used produce a lot of resistance (drag) compared to the power used especially when navigating with C T load indices lower than the value 3, in the free navigation condition.
  • JP2006306304 A priority 04/28/2005, published 09/11/2006.
  • JP58085792 (A) priority 11/16/1981, published on 05/23/1983.
  • the technical advantage provided by this invention lies in reducing axial losses, greatly reducing the nozzle drag, and significantly increasing the lift coefficient C L with the consequent acceleration of water in the plane of sweeping the propeller, all which combined contributes to a significant increase in efficiency of the propulsive system.
  • the invention relates to a symmetrical fixed accelerator nozzle for watercraft in free navigation condition according to claim 1.
  • Preferred embodiments of the nozzle are defined in the dependent claims.
  • the solution to the technical problem raised above consists in the use of a fixed symmetric accelerator nozzle for watercraft in free navigation condition, which comprises, in the sense of general water circulation, first a converging convex interior surface, then a cylindrical interior surface and Finally, a divergent convex interior surface, with a single nozzle for each propeller.
  • the difference between the outer radius of the nozzle and the inner radius of the nozzle is comprised between 0.050D and 0.076D, where D is the inside diameter of the nozzle, to considerably reduce the nozzle drag, as for load coefficients below the value 3 the influence of the suction of the propeller does not reach a greater radial distance. Only with these indicated characteristics of the nozzle the technical problem raised is solved.
  • the line containing the nozzle profile cord which runs from the front end of the inlet edge to the rear end of the outlet edge, forms an angle with the axis of symmetry of the nozzle, so that they intersect at a point upstream of the nozzle (to increase the lift coefficient C L with respect to the current nozzles at which the crossing occurs downstream);
  • the outer surface of the nozzle is cylindrical along its entire axial length from the leading inlet edge to the trailing edge of the water in accordance with the general direction of water circulation (to avoid detachment of the boundary layer in this area and therefore the turbulence);
  • the leading edge, with circumference as a generatrix of the toroidal surface has a radius of curvature in profile, of said circumference, between 0.01019D and 0.004D (so that the penetration of the nozzle in the fluid causes less resistance);
  • the scanning plane of the center of the propeller blade tips, perpendicular to the axis of symmetry of the nozzle, is closer to the inlet edge
  • the difference between the outer radius of the nozzle and the inner radius of the nozzle is 0.063D;
  • the L / D ratio is 0.4970;
  • the inlet edge of the nozzle has a radius of curvature in profile of 0.01019D;
  • the divergent convex inner surface has the downstream end portion having a very pronounced divergence of more than 50 e with respect to the axis of symmetry of the nozzle.
  • the L / D ratio is between 0.40 and 0.60; the converging inner surface is joined to the outer surface by means of a toroidal surface, with circumference as a generatrix, forming the inlet edge of water in the nozzle, and the divergent inner surface and the outer surface of the nozzle coincide in a living edge (not rounded), forming the exit edge of the water from the nozzle, the profile of the nozzle being exactly the same in the 360 e of coverage.
  • This fixed symmetric accelerator nozzle for watercraft in free navigation condition is part of a floating or underwater watercraft, with an engine that is attached and imparts turning movement to the propeller shaft of the propulsion system constituted by the propeller and said nozzle.
  • the nozzle with all these characteristics acts together with the propeller (influence or mutual interaction), increasing the performance of the propeller system, compared to those currently used, which are naturally the most efficient to date.
  • This symmetrical nozzle having a profile with greater peripheral length inside than outside, from the leading edge to the trailing edge, is a water speed accelerating nozzle inside the nozzle; decelerating nozzles such as the "33" nozzle of "MARIN” have a profile with greater outer peripheral length and are only used on military ships to reduce cavitation and noise, especially if lower performance is obtained even than with an open propeller, in order to make detection more difficult; the line that contains the rope of the profile that goes from the center of the rounded anterior edge to the living edge of the trailing edge, intersects with the axis of symmetry of the nozzle upstream of it, thereby presenting a greater angle of attack with respect to the general direction of water entering to the nozzle (which is always convergent even with low load indexes C T ) the lift coefficient C L is greater and therefore the acceleration caused by this concept of the nozzle to the water that it goes through it; as is well known to elder higher efficiency of a nozzle, and as it is designed for load indexes C T
  • the thrust coefficient of the propeller ⁇ is lower for the same speed of the spacecraft and therefore this increases efficiency; in the decelerating nozzles, the thrust coefficient of the propeller ⁇ is greater than the unit and therefore decreases the efficiency of the propeller-nozzle propulsion system as a whole.
  • the notable minor difference between the outer radius of the nozzle and the inner radius causes a minimum drag for load indexes of value 3 or lower.
  • Axial losses in the effective wake are reduced, since the nozzle, having the trailing edge with the maximum radius, induces the liquid vein that passes through the interior of the nozzle to reach said maximum radius downstream to join with the water coming from the cylindrical outer surface, with which increasing the diameter of the liquid vein increases the static pressure in this posterior area which is transmitted to the propeller-nozzle system as an increase in thrust and most importantly decreases the speed difference of the liquid vein downstream of the nozzle with respect to the speed of the surrounding water, whereby axial losses due to friction and turbulence in the effective wake considerably decrease.
  • the final truncation of the nozzle with a divergence greater than 50 e implies the detachment of the boundary layer in a plane very close to the plane of the trailing edge, where it is profitable from the point of view of efficiency, since the reverse flow in the wall it is scarce and a free expansion of the liquid vein is allowed until reaching the peripheral current from the cylindrical outer surface of the nozzle to join both downstream; lengthening the nozzle would lead to greater drag by friction.
  • This proposed nozzle has the advantage of increasing the propulsive performance of the propeller-nozzle assembly and, therefore, decreasing fuel consumption in the same proportion, in all types of watercraft in free navigation condition up to a cruising speed exceeding 20 knots, with respect to the propulsive systems that are currently used; all semiplaneadoras and glider ships are left out where both the open propeller and the water jet systems are more efficient.
  • the invention also relates to a floating or underwater watercraft, in free navigation condition, comprising a propulsion system comprising a propeller with a shaft attached to a motor to impart rotation movement to said shaft, where said propulsion system It also includes a fixed symmetrical accelerator nozzle as defined in the foregoing.
  • Figure 1 is a schematic representation in axial section of the nozzle.
  • Figure 2 is a schematic representation of the profile of the nozzle with representation of the rope and other details.
  • Figure 3 is an enlarged detail of the front part of the nozzle profile.
  • Figure 4 is a schematic representation of the propeller assembly, nozzle and nozzle supports, seen from downstream.
  • Figure 5 is a schematic representation of the propulsion system of propeller and fixed nozzle with respect to the propeller, in vertical section of the nozzle by a plane containing the axis of rotation of the propeller; and in view the propeller is represented with the blades and the core (hub), the horn (rear support of the propeller shaft), the elbow, a nozzle holder and the rudder; forming part of a ship, so that the details of the set can be well appreciated.
  • Figure 1 shows the front part 1 of the nozzle, the central part 2 of the nozzle and the rear part 3 of the nozzle; the axial length A of the front part, the axial length B of the central part and the axial length C of the rear part; the nozzle 4, the inlet edge 5 of the water in the nozzle and the outlet edge 6 of the water of the nozzle, observing how the inner walls are convergent convexes in the direction of the flow in the anterior part, then straight and, by both, cylindrical the surface, and then convex divergent to the rear end.
  • Figure 2 shows the profile of the nozzle in which the rope 9 is represented by a line that goes from the front end of the entrance edge to the rear end of the exit edge; the scanning plane 10 of the center of the propeller blade tips perpendicular to the axis of symmetry of the nozzle, represented by a broken line, observing how the axial distance H of 0.4564L to the inlet edge is less than the axial distance E to the exit edge; the tangent line 11 to the profile is also represented by a point located at an axial distance F of 0.046L downstream of the inlet edge forming an angle to a line 12 parallel to the axis of symmetry of the nozzle of 26 °.
  • Figure 3 shows the current line G indicating the direction and general direction of the upstream fluid, immediately before entering the front part of the nozzle; part of the rope 9 and the angle ⁇ that form both directions are also observed, in the same plane that contains the axis of symmetry of the nozzle; and also the radius r of the circumference generated by the surface is observed propeller and fixed nozzle with respect to the propeller, in vertical section of the nozzle by a plane containing the axis of rotation of the propeller; and in view the propeller is represented with the blades and the core (hub), the horn (rear support of the propeller shaft), the elbow, a nozzle holder and the rudder; forming part of a ship, so that the details of the set can be well appreciated.
  • Figure 1 shows the front part 1 of the nozzle, the central part 2 of the nozzle and the rear part 3 of the nozzle; the axial length A of the front part, the axial length B of the central part and the axial length C of the rear part; the nozzle 4, the inlet edge 5 of the water in the nozzle and the outlet edge 6 of the water of the nozzle, observing how the inner walls are convergent convexes in the direction of the flow in the anterior part, then straight and, by both, cylindrical the surface, and then convex divergent to the rear end.
  • Figure 2 shows the profile of the nozzle in which the rope 9 is represented by a line that goes from the front end of the entrance edge to the rear end of the exit edge; the scanning plane 10 of the center of the propeller blade tips perpendicular to the axis of symmetry of the nozzle, represented by a broken line, observing how the axial distance H of 0.4564L to the inlet edge is less than the axial distance E to the exit edge; the tangent line 11 to the profile is also represented by a point located at an axial distance F of 0.046L downstream of the inlet edge forming an angle a with a line 12 parallel to the axis of symmetry of the nozzle of 26 e .
  • Figure 3 shows the current line G indicating the direction and general direction of the upstream fluid, immediately before entering the front part of the nozzle; part of the rope 9 and the angle ⁇ that form both directions are also observed, in the same plane that contains the axis of symmetry of the nozzle; and also the radius r of the circumference generated by the surface is observed 10 toroidal of the entrance edge, having as axis of rotation the axis of symmetry of the nozzle; said radius r of the circumference has a value of 0.01019D and naturally the leading edge of the complete nozzle has a toroidal surface.
  • Figure 4 shows the blades 14, the blade tips in the form of an arc coaxial to the axis of rotation, the direction of rotation of the blades indicated by arrow, the core (hub) of the propeller, and the supports 13 of the nozzle 4 joining this to the stern of the ship, not shown in this figure.
  • Figure 5 shows the nozzle 4, the propeller with its blades 14, the rudder 15, one of the two supports 13 of the nozzle, and the elbow 16 belonging to the vessel.
  • the core of the propeller (central part of the propeller) is attached to the shaft and this to the ship's engine.
  • the motor shaft passes through the interior of the horn that acts as a support at the stern end of the hull.
  • the rotating propeller causes less static pressure in front and greater static pressure behind, such pressures are also transmitted locally on the interior walls of the nozzle, whereby the nozzle pushes the vessel with the axial component, through the supports that connect it to the stern of the ship.
  • Both the propeller and the nozzle push the vessel, both forming the propulsion system.
  • the propulsion system is part of the ship.
  • the nozzle protects the propeller from most shocks with external elements and therefore from irreversible deterioration; and also of networks and cables that could temporarily disable it.
  • the length of the radius has the same value as the abscissa.
  • This invention has industrial application in the naval industry.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Farming Of Fish And Shellfish (AREA)
  • Nozzles (AREA)

Abstract

L'invention concerne une tuyère (4) fixe symétrique d'accélération pour vaisseaux aquatiques en condition de navigation libre, qui comprend dans le sens de circulation général de l'eau, tout d'abord, une surface intérieure convexe convergente (1), suivie d'une surface intérieure cylindrique (2) et enfin une surface intérieure convexe divergente (3); avec une seule tuyère pour chaque hélice; caractérisée en ce que la différence entre le rayon extérieur (Ro) de la tuyère et le rayon intérieur (Ri) de la tuyère est comprise entre 0,050D et 0,076D, D désignant le diamètre intérieur de la tuyère. L'invention concerne également un vaisseau aquatique flottant ou sous-marin, en condition de navigation libre, qui comprend une telle tuyère fixe symétrique accélératrice.
PCT/ES2013/070341 2012-05-30 2013-05-28 Tuyère fixe symétrique d'accélération pour vaisseaux aquatiques en condition de navigation libre WO2013178853A2 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
ESP201200572 2012-05-30
ES201200572A ES2385994B2 (es) 2012-05-30 2012-05-30 Tobera fija simétrica aceleradora para naves acuáticas en condición de navegación libre
ESPCT/ES2012/070835 2012-11-28
PCT/ES2012/070835 WO2013178837A1 (fr) 2012-05-30 2012-11-28 Tuyère fixe symétrique d'accélération pour vaisseaux aquatiques en condition de navigation libre
EPPCT/EP2013/057943 2013-04-16
EP2013057943 2013-04-16

Publications (2)

Publication Number Publication Date
WO2013178853A2 true WO2013178853A2 (fr) 2013-12-05
WO2013178853A3 WO2013178853A3 (fr) 2014-01-23

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106081029A (zh) * 2016-06-17 2016-11-09 哈尔滨工程大学 正反向等推力导管推进器
US9751593B2 (en) 2015-01-30 2017-09-05 Peter Van Diepen Wave piercing ship hull

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2139594A (en) 1936-02-08 1938-12-06 Kort Ludwig Combined propelling and steering device for screw propelled ships
JPS5299597A (en) 1976-02-17 1977-08-20 Hitachi Zosen Corp Propeller with nozzle
JPS5885792A (ja) 1981-11-16 1983-05-23 Mitsubishi Heavy Ind Ltd 船舶用ノズル
US4789302A (en) 1987-02-06 1988-12-06 Josip Gruzling Propeller shroud
US4832633A (en) 1977-11-30 1989-05-23 Hydronic, Ltd. Marine propulsion system
WO1989011998A1 (fr) 1988-06-01 1989-12-14 Van Gunsteren & Gelling Marine Propulsion Developm Double ajutage
DE4325290A1 (de) 1993-07-28 1995-02-02 Dudszus Alfred Prof Dr Ing Hab Nachstromdüse
US5799394A (en) 1996-02-05 1998-09-01 Rice; Jose Luis Method of making a marine speed nozzle
WO2000027697A1 (fr) 1998-11-09 2000-05-18 Scheepswerf Van De Giessen B.V. Dispositif pour la propulsion de bateaux, et buse utilisee dans celui-ci
JP2006306304A (ja) 2005-04-28 2006-11-09 Niigata Shipbuilding & Repair Inc 推進装置及びその製造方法
ES2317799A1 (es) 2008-08-01 2009-04-16 Juan Jose Romero Vazquez Sistema de propulsion con helice y tobera fija respecto a la helice.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5120395A (ja) * 1974-08-13 1976-02-18 Mitsubishi Heavy Ind Ltd Hakuyonozurupuropera
SU1134477A1 (ru) * 1983-10-05 1985-01-15 Центральное технико-конструкторское бюро Министерства речного флота РСФСР Движительно-рулевое устройство судна
ES2385994B2 (es) * 2012-05-30 2013-01-02 Juan José ROMERO VÁZQUEZ Tobera fija simétrica aceleradora para naves acuáticas en condición de navegación libre

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2139594A (en) 1936-02-08 1938-12-06 Kort Ludwig Combined propelling and steering device for screw propelled ships
JPS5299597A (en) 1976-02-17 1977-08-20 Hitachi Zosen Corp Propeller with nozzle
US4832633A (en) 1977-11-30 1989-05-23 Hydronic, Ltd. Marine propulsion system
JPS5885792A (ja) 1981-11-16 1983-05-23 Mitsubishi Heavy Ind Ltd 船舶用ノズル
US4789302A (en) 1987-02-06 1988-12-06 Josip Gruzling Propeller shroud
DE3840958A1 (de) 1987-02-06 1990-06-07 Gruzling Propellerummantelung
WO1989011998A1 (fr) 1988-06-01 1989-12-14 Van Gunsteren & Gelling Marine Propulsion Developm Double ajutage
DE4325290A1 (de) 1993-07-28 1995-02-02 Dudszus Alfred Prof Dr Ing Hab Nachstromdüse
US5799394A (en) 1996-02-05 1998-09-01 Rice; Jose Luis Method of making a marine speed nozzle
WO2000027697A1 (fr) 1998-11-09 2000-05-18 Scheepswerf Van De Giessen B.V. Dispositif pour la propulsion de bateaux, et buse utilisee dans celui-ci
JP2006306304A (ja) 2005-04-28 2006-11-09 Niigata Shipbuilding & Repair Inc 推進装置及びその製造方法
ES2317799A1 (es) 2008-08-01 2009-04-16 Juan Jose Romero Vazquez Sistema de propulsion con helice y tobera fija respecto a la helice.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9751593B2 (en) 2015-01-30 2017-09-05 Peter Van Diepen Wave piercing ship hull
CN106081029A (zh) * 2016-06-17 2016-11-09 哈尔滨工程大学 正反向等推力导管推进器

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