EP1894635A1 - Method for producing a two-phase gas-droplet jet and a device for carrying out said method - Google Patents

Method for producing a two-phase gas-droplet jet and a device for carrying out said method Download PDF

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Publication number
EP1894635A1
EP1894635A1 EP06757963A EP06757963A EP1894635A1 EP 1894635 A1 EP1894635 A1 EP 1894635A1 EP 06757963 A EP06757963 A EP 06757963A EP 06757963 A EP06757963 A EP 06757963A EP 1894635 A1 EP1894635 A1 EP 1894635A1
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EP
European Patent Office
Prior art keywords
gas
drop
jet
creating
nozzle
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP06757963A
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German (de)
French (fr)
Other versions
EP1894635A4 (en
Inventor
Igor Aleksandrovich Lepeshinsky
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Publication of EP1894635A1 publication Critical patent/EP1894635A1/en
Publication of EP1894635A4 publication Critical patent/EP1894635A4/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • 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
    • 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
    • A62C31/05—Nozzles specially adapted for fire-extinguishing with two or more outlets
    • 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
    • A62C31/12—Nozzles specially adapted for fire-extinguishing for delivering foam or atomised foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane

Definitions

  • a method for shaping a biphasic gas-drop jet and a device for its implementation is a method for shaping a biphasic gas-drop jet and a device for its implementation.
  • the proposed group of inventions relates to technique for obtaining highly concentrated jets, featuring a long range and finely dispersed structure of drops.
  • Such jets may be used in fire extinguishing equipment, in agriculture for watering and in other fields where finely dispersed and long-range gas-drop jets are required.
  • the method most close from the point of view of technical essence to the offered engineering solution is the method for creating a gas-drop jet, including supply of liquid and gas stream, dispersion of liquid, mixing the dispersed liquid with the gas stream and acceleration of the obtained biphasic gas-drop stream (RF Patent N° 2243036 , Cl. B05B 7/10, 2002).
  • the known method has the following drawbacks:
  • the closest engineering solution to the proposed one is the device for realization of a method of creation of the gas-drop jet, including a chamber for shaping a biphasic gas-drop stream with inlets for supplying liquid and gas and a gas-dynamic nozzle connected to it (RF Patent N° 2243036 , Cl. B05B 7/10, 2002) .
  • the known design has a drawback of decrease in gas-drop jet range because of a dilative shape of the nozzle channel in its outlet portion since the emanating jet has radial components that improves mixing the jet with the environment and its promotes its faster braking.
  • the aims of the proposed group of inventions are as follows: extending the jet range due to more rational use of the energy of the liquid and its utmost transformation in kinetic energy of ordered motion due to design features of the device.
  • the technical result in the proposed invention is reached by creating a method for shaping a gas-drop jet including delivery of liquid and gas stream, dispersion of liquid, mixing the dispersed liquid with the gas stream and acceleration of the resulting biphasic gas-drop stream where, according to the invention, a biphasic gas-drop stream after mixing is divided, at least, to two streams and is accelerated separately in one direction till obtaining identical values of output speed and pressure at the nozzle outlet.
  • a device for the creating a gas-drop jet including a chamber for shaping a biphasic gas-drop stream with inlets for supplying liquid and gas and a gas-dynamic nozzle connected to it where, according to the invention, the nozzle is made as at least, double-ring, coaxial device, and each ring has a profiled channel designed for creating identical values of output speed and pressure at the nozzle outlet, and the channels are unidirectional.
  • Fig. 1 the installation diagram of the device for implementing the method for creating gas-drop jet with coaxial, e.g., a double-ring nozzle is shown.
  • the device for creating a gas-drop jet includes the chamber 1 for shaping a biphasic gas-drop stream with inlets for supplying liquid 2 and gas 3, a multi-ring coaxial gas-dynamic nozzle 4 connected to the said device.
  • the multi-ring coaxial gas dynamic nozzle 4 consists of two (or more) unidirectional channels: the external channel 5 and 6 of the internal channel 6 and is designed for accelerating the gas-drop stream having a disperse structure and obtaining a gas-drop jet.
  • the multi-ring coaxial gas-dynamic nozzle 4 may be double-ring or multi-ring for compacting the jet.
  • the inlets for supplying liquid 2 and gas 3 are connected to devices for supplying liquid 7 and gas 8.
  • the proposed method for creating a gas-drop jet is implemented as follows:
  • the working media gas (e.g. air) and water are supplied to the chamber for shaping the biphasic gas-drop stream 1 where the liquid is dispersed and a biphasic stream of the gas-drop structure is created.
  • gas e.g. air
  • water are supplied to the chamber for shaping the biphasic gas-drop stream 1 where the liquid is dispersed and a biphasic stream of the gas-drop structure is created.
  • the biphasic gas-drop stream shaped in the chamber for shaping the biphasic gas-drop stream is divided, for example, to two (or more) streams, each of those streams is supplied to the corresponding channel of the nozzle 4 where they are accelerated in one direction for getting identical speed and pressure at the nozzle outlet.
  • the first stream is supplied to the external ring 5, the second stream is supplied to the internal ring or circle 6.
  • the gas-drop jet having minimal radial components is shaped. This allows to reduce the radial expansion of the jet, or to compact it. In both cases, the jet range extends.
  • a turboblower station may be used as a gas source.
  • the turboblower station may be equipped with a pump for maintaining the required parameters of the liquid.
  • the proposed device may be mobile if necessary.
  • a vehicle for example, a car, a helicopter, an aircraft, water transport. (not shown in the figure).
  • the parameters of the device for implementing the proposed method such as pressure P CH in the chamber for shaping the biphasic gas-drop stream 1, throughput weight of liquid G L and gas G G ; initial pressure of fluid P L and distribution of throughput between the streams are to be chosen according to the condition of obtaining the set extent of jet reach.
  • the proposed device is set to a starting position.
  • the multi-ring coaxial gas-dynamic nozzle 4 with the stream of gas-drop structure is directed towards the target object where the gas-drop jet is to be supplied.
  • the flow of biphasic stream was distributed between the rings or circles as one to five relationship (internal circle to the external ring).
  • the jet range as compared to that of the single-circle nozzle design extends under the given conditions by 15%.
  • the jet range extended by 15% as compared to the prototype under equal boundary conditions.
  • test results confirm the possibility of implementation of the proposed method for creating a gas-drop jet and the device for its implementation, and the possibility of achievement of the technical result consisting in raising the efficiency of the gas-drop jet.
  • Use of the group of inventions in fire fighting equipment is the most effective for suppressing fires in the sites where the use of minimum quantity of fluid with maximum efficiency (for minimizing the damage from the process of extinguishing), in climate systems for agriculture, medicine, environment protection, etc.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Nozzles (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)

Abstract

The proposed invention relates to technique for obtaining of highly concentrated jets, featuring long range and finely dispersed structure of drops. Such jets may be used in fire extinguishing equipment, in agriculture for watering and in other fields where finely dispersed and long-range gas-drop jets are required.
The aims of the proposed group of inventions are as follows: extending the jet range due to more rational use of energy of fluid and its utmost transformation in kinetic energy of ordered motion due to design features of the device.
The technical result in the proposed invention is reached by creating a method for shaping a gas-drop jet where, according to the present invention, the biphasic gas-drop stream after mixing is divided in, at least, two streams and which are accelerated separately in one direction until the reach identical values of the output speed and the pressure at the nozzle outlet.
The technical result in the proposed invention is also reached by creating a device for creating a gas-drop jet where according to the present invention, the nozzle is made as at least, double-ring, coaxial device, and each ring forms a profiled channel designed for creating identical values of the output speed and the pressure at the nozzle outlet, and wherein the channels are unidirectional.

Description

  • A method for shaping a biphasic gas-drop jet and a device for its implementation.
  • The proposed group of inventions relates to technique for obtaining highly concentrated jets, featuring a long range and finely dispersed structure of drops. Such jets may be used in fire extinguishing equipment, in agriculture for watering and in other fields where finely dispersed and long-range gas-drop jets are required.
  • There are known methods for creating fluid jets, one of them provides the long range of jet due to increase of pressure in the fluid supply system, while the others - due to supplying the gas stream to the installation nozzle.
  • There is a known method for creating a gas-drop jet which consists in using the ejecting effect of the gas jet supplied to the gas-jet nozzle orifice of the nozzle, for dispersing the liquid and increasing the jet range (certificate of authorship N° 380279, Cl. A01G 25/00,1973).
  • There is a known installation for creating a gas-drop jet, including a fluid supply system a gas-dynamic nozzle with central gas-jet orifice (certificate of authorship Nº 380279, Cl. A01G 25/00, 1973).
  • The method most close from the point of view of technical essence to the offered engineering solution is the method for creating a gas-drop jet, including supply of liquid and gas stream, dispersion of liquid, mixing the dispersed liquid with the gas stream and acceleration of the obtained biphasic gas-drop stream (RF Patent N° 2243036 , Cl. B05B 7/10, 2002).
  • The known method has the following drawbacks:
    • limited nature of used ways for shaping the biphasic stream;
    • lowering the efficiency of a gas-drop jet, in particular, because of losses of kinetic energy of liquid in the axial direction due to significant radial components of speed when shaping the jet of gas-drop structure.
  • The closest engineering solution to the proposed one is the device for realization of a method of creation of the gas-drop jet, including a chamber for shaping a biphasic gas-drop stream with inlets for supplying liquid and gas and a gas-dynamic nozzle connected to it (RF Patent N° 2243036 , Cl. B05B 7/10, 2002) .
  • The known design has a drawback of decrease in gas-drop jet range because of a dilative shape of the nozzle channel in its outlet portion since the emanating jet has radial components that improves mixing the jet with the environment and its promotes its faster braking.
  • The aims of the proposed group of inventions are as follows: extending the jet range due to more rational use of the energy of the liquid and its utmost transformation in kinetic energy of ordered motion due to design features of the device.
  • The technical result in the proposed invention is reached by creating a method for shaping a gas-drop jet including delivery of liquid and gas stream, dispersion of liquid, mixing the dispersed liquid with the gas stream and acceleration of the resulting biphasic gas-drop stream where, according to the invention, a biphasic gas-drop stream after mixing is divided, at least, to two streams and is accelerated separately in one direction till obtaining identical values of output speed and pressure at the nozzle outlet.
  • This allows to lower the radial components of the stream at the nozzle outlet due to reduction of geometrical influence on the stream: several channels instead of one, and to extend the reach of the created gas-drop jet. In this case, the nozzle becomes a multi-ring device.
  • The technical result in the proposed invention is reached by creating a device for the creating a gas-drop jet including a chamber for shaping a biphasic gas-drop stream with inlets for supplying liquid and gas and a gas-dynamic nozzle connected to it where, according to the invention, the nozzle is made as at least, double-ring, coaxial device, and each ring has a profiled channel designed for creating identical values of output speed and pressure at the nozzle outlet, and the channels are unidirectional.
  • The presence of two (or more) coaxial channels allows to extend the reach of the obtained gas-drop jet. All the above allows to draw a conclusion: the proposed inventions raise the efficiency of a gas-drop jet.
  • The patent research has shown that there are no known engineering solutions with the specified set of essential features, in similar methods for creating a gas-drop jet and devices for their implementation, i.e. the group of proposed solutions corresponds to the novelty criterion.
  • After analyzing the known analogues and the prototype there we no revealed proposals with the set of essential features stated in the claims of the invention that means that for the experts engaged in methods for creating a gas-drop jet and devices for their implementation, they obviously do not follow from the state of the art and, hence, meet the criterion of the "level of invention".
  • The authors believe that the information stated in the materials of the application is enough for practical implementation of the group of inventions.
  • The proposed group of inventions is explained using the following description and the figures, where:
  • In Fig. 1 the installation diagram of the device for implementing the method for creating gas-drop jet with coaxial, e.g., a double-ring nozzle is shown.
  • In Fig. 2 the sectional view of a gas-dynamic double-ring nozzle is shown. The device for creating a gas-drop jet includes the chamber 1 for shaping a biphasic gas-drop stream with inlets for supplying liquid 2 and gas 3, a multi-ring coaxial gas-dynamic nozzle 4 connected to the said device.
  • The multi-ring coaxial gas dynamic nozzle 4, consists of two (or more) unidirectional channels: the external channel 5 and 6 of the internal channel 6 and is designed for accelerating the gas-drop stream having a disperse structure and obtaining a gas-drop jet.
  • The multi-ring coaxial gas-dynamic nozzle 4 may be double-ring or multi-ring for compacting the jet.
  • The inlets for supplying liquid 2 and gas 3 are connected to devices for supplying liquid 7 and gas 8.
  • The proposed method for creating a gas-drop jet is implemented as follows:
  • The working media: gas (e.g. air) and water are supplied to the chamber for shaping the biphasic gas-drop stream 1 where the liquid is dispersed and a biphasic stream of the gas-drop structure is created.
  • The biphasic gas-drop stream shaped in the chamber for shaping the biphasic gas-drop stream is divided, for example, to two (or more) streams, each of those streams is supplied to the corresponding channel of the nozzle 4 where they are accelerated in one direction for getting identical speed and pressure at the nozzle outlet.
  • The first stream is supplied to the external ring 5, the second stream is supplied to the internal ring or circle 6. At the outlet of the double-ring nozzle 4 the gas-drop jet having minimal radial components is shaped. This allows to reduce the radial expansion of the jet, or to compact it. In both cases, the jet range extends.
  • A turboblower station may be used as a gas source.
  • The turboblower station may be equipped with a pump for maintaining the required parameters of the liquid.
  • The proposed device may be mobile if necessary.
  • For this purpose it is supplied with a vehicle, for example, a car, a helicopter, an aircraft, water transport. (not shown in the figure).
  • The parameters of the device for implementing the proposed method, such as pressure PCH in the chamber for shaping the biphasic gas-drop stream 1, throughput weight of liquid GL and gas GG; initial pressure of fluid PL and distribution of throughput between the streams are to be chosen according to the condition of obtaining the set extent of jet reach.
  • The estimation of implementation of the proposed method for obtaining a gas-drop stream, e.g., in a double-ring nozzle allows to extend the jet range by 10-30% other conditions being equal.
  • The proposed device is set to a starting position. The multi-ring coaxial gas-dynamic nozzle 4 with the stream of gas-drop structure is directed towards the target object where the gas-drop jet is to be supplied.
  • Researches have been made with the following parameters:
    • PCH= 5x 105 Pa - the pressure in the mixing chamber;
    • GL= 140 kilogram-force - mass flow of fluid;
    • GG=3.5 kilogram-force - mass flow of gas;
    • PL=10 x 105 Pa - liquid pressure.
  • The flow of biphasic stream was distributed between the rings or circles as one to five relationship (internal circle to the external ring).
  • The jet range as compared to that of the single-circle nozzle design extends under the given conditions by 15%.
  • The obtained results of distribution of a gas-drop jet testify that the parameters chosen according to the above-stated conditions and obtaining the jet according to the proposed method, allow to raise the efficiency of the obtained biphasic gas-drop jet due to fuller use of fluid energy.
  • In particular, the jet range extended by 15% as compared to the prototype under equal boundary conditions.
  • The test results confirm the possibility of implementation of the proposed method for creating a gas-drop jet and the device for its implementation, and the possibility of achievement of the technical result consisting in raising the efficiency of the gas-drop jet.
  • Use of the group of inventions in fire fighting equipment is the most effective for suppressing fires in the sites where the use of minimum quantity of fluid with maximum efficiency (for minimizing the damage from the process of extinguishing), in climate systems for agriculture, medicine, environment protection, etc.

Claims (2)

  1. A method for creating a the gas-drop jet, including supplying a liquid and a gas stream, dispersing the liquid, mixing the dispersed liquid with the gas stream and accelerating of the obtained biphasic gas-drop stream in a nozzle, wherein after mixing the gas-drop stream it is divided in at least two streams being accelerated separately in one direction until they reach identical values of the output speed and the pressure at the nozzle outlet.
  2. A device for creating a the gas-drop jet, including a chamber (1) for forming a biphasic gas-drop stream with inlets for supplying a liquid (2) and a gas (3) and a gas-dynamic nozzle (4) connected to it, wherein the nozzle (4) is made as an, at least, double-ring, coaxial, device and each ring is made with a profiled channel (5,6), designed for creating identical values of the output speed and the pressure at the nozzle outlet, and wherein the channels are unidirectional.
EP06757963A 2005-05-23 2006-05-23 Method for producing a two-phase gas-droplet jet and a device for carrying out said method Withdrawn EP1894635A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2005115508 2005-05-23
PCT/RU2006/000258 WO2006137755A1 (en) 2005-05-23 2006-05-23 Method for producing a two-phase gas-droplet jet and a device for carrying out said method

Publications (2)

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EP1894635A1 true EP1894635A1 (en) 2008-03-05
EP1894635A4 EP1894635A4 (en) 2009-06-10

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WO (1) WO2006137755A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103028217A (en) * 2011-09-29 2013-04-10 上海磊诺工业气体有限公司 Flush type gas nozzle
JP2013081924A (en) * 2011-10-12 2013-05-09 Jfe Engineering Corp Spray nozzle and fluid atomizing device using the spray nozzle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101357255B (en) * 2008-09-11 2011-09-14 中国科学技术大学 Involute arc spout fire-fighting extinguishing spray-head

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD233490A1 (en) * 1985-01-02 1986-03-05 Tech Hochschule Magdeburg Otto METHOD AND DEVICE FOR APPLYING A LUBRICANT
GB8724973D0 (en) * 1987-10-24 1987-11-25 Bp Oil Ltd Fire fighting
RU2107554C1 (en) * 1996-07-08 1998-03-27 Научно-исследовательский институт низких температур при Московском государственном авиационном институте (техническом университете) Method of forming gaseous dripping jet; plant for realization of this method and nozzle for forming gaseous dripping jet
RU2121390C1 (en) * 1997-05-14 1998-11-10 Научно-исследовательский институт низких температур при МАИ (Московском государственном авиационном институте - техническом университете) Fire-extinguishing plant
FR2766108B1 (en) * 1997-07-17 1999-10-15 France Etat DEVICE FOR GENERATING A DIPHASIC FLUID
RU2243036C1 (en) * 2003-04-17 2004-12-27 Закрытое акционерное общество "СИЛЭН" Method to form a gas-drop jet and a device for its realization

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103028217A (en) * 2011-09-29 2013-04-10 上海磊诺工业气体有限公司 Flush type gas nozzle
JP2013081924A (en) * 2011-10-12 2013-05-09 Jfe Engineering Corp Spray nozzle and fluid atomizing device using the spray nozzle

Also Published As

Publication number Publication date
WO2006137755A1 (en) 2006-12-28
EP1894635A4 (en) 2009-06-10

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