EP0471321A1 - Method and apparatus for creating an increased hydrodynamic head of fluid jets - Google Patents

Method and apparatus for creating an increased hydrodynamic head of fluid jets Download PDF

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Publication number
EP0471321A1
EP0471321A1 EP19910113497 EP91113497A EP0471321A1 EP 0471321 A1 EP0471321 A1 EP 0471321A1 EP 19910113497 EP19910113497 EP 19910113497 EP 91113497 A EP91113497 A EP 91113497A EP 0471321 A1 EP0471321 A1 EP 0471321A1
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EP
European Patent Office
Prior art keywords
liquid
phase
steam
fluid jet
generation
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.)
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EP19910113497
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German (de)
French (fr)
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EP0471321B1 (en
Inventor
Efim Fuks
Vadim Fuks
Vladimir Lunev
Sergey Lunev
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APRIL DYNAMICS INDUSTRIES 1990 LTD.
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APRIL DYNAMICS INDUSTRIES 1990 Ltd
April Dynamics Ind Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3122—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof the material flowing at a supersonic velocity thereby creating shock waves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31242—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit

Definitions

  • This patent application relates to jet technique and is intended to heat up as well as to supercharge liquid in various applications.
  • This aim can be obtained by side draining of the liquid in full or in part from the zone of shock wave - abrupt pressure rise - condensation.
  • shock wave - abrupt pressure rise - condensation zone This transition is accomplished in the shock wave - abrupt pressure rise - condensation zone.
  • shock wave zone occurs quick and complete condensation of the steam phase of the flow. As a whole, steam energy cannot immediately be converted to heat, so a part of this energy is converted to mechanical work.
  • the single drawing is a simplified cross-section of a device for use in connection with the method mentioned in this patent application.
  • This device is one of various options for implementing the process mentioned above.
  • the shown device comprises a nozzle 1 with an inlet 2 for introducing steam and coaxial to the nozzle a body 3 with an inlet 4 for introducing liquid, and a mixing chamber 5.
  • the mixing chamber 5 comprises an outlet 6 for the liquid and an auxiliary exit (side draining) 7.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

The method of generating an increased hydrodynamic head of fluid jet consists of the following sequence of operations: formation of two-phase gas-liquid or steam-liquid flow, formation of hydrodynamic flow regime of the obtained two-phase mixture with a velocity exceeding the sound speed of said mixture, providing conditions for generation of shock wave - abrupt pressure rise - gaseous phase condensation (dissolving) in said gas-liquid or steam-liquid stream which flows with a speed exceeding the sound speed for this medium, and side draining liquid in full or in part from said zone of shock wave - abrupt pressure rise - condensation (dissolving) of said gaseous phase. This method allows a substantial increase of the hydrodynamic head of liquid jet inside the post-shock zone.

Description

  • This patent application relates to jet technique and is intended to heat up as well as to supercharge liquid in various applications.
  • It has been known that methods of generation of hydrodynamic head of fluid jet comprise of mixing a liquid with a gas (a steam) and subsequent condensation in full or in part of the gaseous phase.
  • These methods have extensive applications in various industries and are being realized in injector devices.
  • A shortcoming of these methods is that according to the theory, a liquid pressure at the ejector exit cannot exceed the half-sum of both liquid and gas pressures at the injector inlet.
  • There is a known method for generating a hydrodynamic head of fluid jet, a method which comprises setting up a two-phase steam-liquid mixture, providing flow regime of this mixture with a velocity which in excess of the sonic speed for this mixture and the gas phase is condensed or dissolved in shock wave - abrupt pressure rise - condensation zone [1] . This method makes it possible to increase the fluid head inside the post-shock zone by about one and a half times in relation to working medium pressure.
  • The degree of this pressure increase is insufficient.
  • It is the aim of this patent application to provide a method for a substantial increase of hydrodynamic head of liquid jet inside the post-shock zone.
  • This aim can be obtained by side draining of the liquid in full or in part from the zone of shock wave - abrupt pressure rise - condensation.
  • Let us consider an example of performing this method in the case where hydrous steam is used as a gaseous phase. There are two ways to create flow of a water-steam mixture:
    • a) Mixing water and steam streams.
    • b) To cause liquid boiling by flowing the liquid at a high speed.
  • For fine-dispersed homogenous liquid-steam stream a sound speed is found in the region of 10 to 40 m/sec. By flowing this mixture with a stream velocity which exceeds the sound speed of this medium, we obtain a supersonic two-phase steam-liquid stream.
  • This is a metastable structure and it leads to transition from supersonic flow of steam-liquid stream to subsonic flow of a liquid stream.
  • This transition is accomplished in the shock wave - abrupt pressure rise - condensation zone. In the shock wave zone occurs quick and complete condensation of the steam phase of the flow. As a whole, steam energy cannot immediately be converted to heat, so a part of this energy is converted to mechanical work.
  • It causes an increase of hydrodynamic head of fluid jet in the post-shock zone.
  • Hydrodynamic effects taking place at side draining liquid in full or in part from the shock wave - abrupt pressure rise - condensation zone lead to an increase of hydrodynamic head of fluid jet at the post-shock zone.
  • In the case of full draining of liquid, a high hydrostatic pressure is produced in the post-shock zone.
  • Using the described method in a multi-stage device (doing the set of the above mentioned operations repeatedly), it is possible to achieve a very high absolute pressure of the fluid jet.
  • Mixing draining part of the flow in full or in part with the liquid incoming for generation of a two-phase steam-liquid stream results in saving both liquid and steam energy.
  • Below is a table of test results of an industrial specimen of a pump-heater device which realizes the described method.
    Figure imgb0001
  • [1] Deich M.E. & Philippov G.A. "Gazodinamics of 2-phase mediums" Moscow, 1968 (p. 267-274)
  • The single drawing is a simplified cross-section of a device for use in connection with the method mentioned in this patent application. This device is one of various options for implementing the process mentioned above.
  • The shown device comprises a nozzle 1 with an inlet 2 for introducing steam and coaxial to the nozzle a body 3 with an inlet 4 for introducing liquid, and a mixing chamber 5. The mixing chamber 5 comprises an outlet 6 for the liquid and an auxiliary exit (side draining) 7.

Claims (5)

1. A method of generating an increased hydrodynamic head of fluid jet consisting of the following sequence of operations:
- formation of two-phase gas-liquid or steam-liquid flow.
- formation of hydrodynamic flow regime of the obtained two-phase mixture with a velocity exceeding the sound speed of said mixture.
- providing conditions for generation of shock wave - abrupt pressure rise - gaseous phase condensation (dissolving) in said gas-liquid or steam-liquid stream which flows with a speed exceeding the sound speed for this medium.
- side draining liquid in full or in part from said zone of shock wave - abrupt pressure rise - condensation (dissolving) of said gaseous phase.
2. A method of generation of increased hydrodynamic head of fluid jet as claimed in claim 1, wherein said gaseous phase is a gaseous-steam phase.
3. A method of generation of increased hydrodynamic head of fluid jet as claimed in claim 1, wherein said gaseous phase is a steam phase.
4. A method of generation of increased hydrodynamic head of fluid jet as claimed in claims 1,2 and 3, wherein said drained liquid is mixed in full or in part with the incoming liquid to said two-phase flow.
5. A method of generation of increased hydrodynamic head of fluid jet as claimed in claims 1,2,3 and 4, wherein the set of said operation is carried out repeatedly (in a multi-stage device).
EP91113497A 1990-08-12 1991-08-12 Method and apparatus for creating an increased hydrodynamic head of fluid jets Expired - Lifetime EP0471321B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL95348 1990-08-12
IL95348A IL95348A0 (en) 1990-08-12 1990-08-12 Method of producing an increased hydrodynamic head of a fluid jet

Publications (2)

Publication Number Publication Date
EP0471321A1 true EP0471321A1 (en) 1992-02-19
EP0471321B1 EP0471321B1 (en) 1995-11-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91113497A Expired - Lifetime EP0471321B1 (en) 1990-08-12 1991-08-12 Method and apparatus for creating an increased hydrodynamic head of fluid jets

Country Status (3)

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EP (1) EP0471321B1 (en)
DE (1) DE69114783T2 (en)
IL (1) IL95348A0 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0878560A2 (en) * 1997-05-16 1998-11-18 Tokyo Electron Limited Vapor generating method and apparatus using same
WO1999001194A1 (en) * 1997-07-02 1999-01-14 Shell Internationale Research Maatschappij B.V. Removing a gaseous component from a fluid
WO2011040837A1 (en) * 2009-09-30 2011-04-07 Fisionic Holding Limited Device for preparation of water-fuel emulsion
CN102102505A (en) * 2009-12-16 2011-06-22 中国石油天然气股份有限公司 Steam injection method for improving dryness of underground steam
US10507480B2 (en) 2004-02-26 2019-12-17 Tyco Fire Products Lp Method and apparatus for generating a mist
US10588276B2 (en) * 2018-08-07 2020-03-17 Flow-Rite Controls, Ltd. Hydroponic nutrient aeration and flow control device and system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2556649C (en) 2004-02-26 2012-07-10 Pursuit Dynamics Plc Improvements in or relating to a method and apparatus for generating a mist
EP1718413B1 (en) 2004-02-26 2009-10-21 Pursuit Dynamics PLC. Method and apparatus for generating a mist
US8419378B2 (en) 2004-07-29 2013-04-16 Pursuit Dynamics Plc Jet pump
GB0618196D0 (en) 2006-09-15 2006-10-25 Pursuit Dynamics Plc An improved mist generating apparatus and method
CA2685537A1 (en) 2007-05-02 2008-11-13 Pursuit Dynamics Plc Liquefaction of starch-based biomass

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0150171A2 (en) * 1984-01-16 1985-07-31 Ernst Dipl.-Ing. Braun Procedure for introducing gas into a gas-liquid mixture

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0150171A2 (en) * 1984-01-16 1985-07-31 Ernst Dipl.-Ing. Braun Procedure for introducing gas into a gas-liquid mixture

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0878560A2 (en) * 1997-05-16 1998-11-18 Tokyo Electron Limited Vapor generating method and apparatus using same
EP0878560A3 (en) * 1997-05-16 2000-04-26 Tokyo Electron Limited Vapor generating method and apparatus using same
US6157774A (en) * 1997-05-16 2000-12-05 Tokyo Electron Limited Vapor generating method and apparatus using same
WO1999001194A1 (en) * 1997-07-02 1999-01-14 Shell Internationale Research Maatschappij B.V. Removing a gaseous component from a fluid
US10507480B2 (en) 2004-02-26 2019-12-17 Tyco Fire Products Lp Method and apparatus for generating a mist
WO2011040837A1 (en) * 2009-09-30 2011-04-07 Fisionic Holding Limited Device for preparation of water-fuel emulsion
CN102102505A (en) * 2009-12-16 2011-06-22 中国石油天然气股份有限公司 Steam injection method for improving dryness of underground steam
US10588276B2 (en) * 2018-08-07 2020-03-17 Flow-Rite Controls, Ltd. Hydroponic nutrient aeration and flow control device and system

Also Published As

Publication number Publication date
IL95348A0 (en) 1991-06-30
EP0471321B1 (en) 1995-11-22
DE69114783D1 (en) 1996-01-04
DE69114783T2 (en) 1996-07-25

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