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 PDFInfo
- 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
- Authority
- 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.)
- Granted
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Classifications
-
- 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
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.
-
- [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 aninlet 4 for introducing liquid, and amixing chamber 5. Themixing chamber 5 comprises anoutlet 6 for the liquid and an auxiliary exit (side draining) 7.
Claims (5)
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
ID=11061493
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)
Country | Link |
---|---|
EP (1) | EP0471321B1 (en) |
DE (1) | DE69114783T2 (en) |
IL (1) | IL95348A0 (en) |
Cited By (6)
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)
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)
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 |
-
1990
- 1990-08-12 IL IL95348A patent/IL95348A0/en unknown
-
1991
- 1991-08-12 DE DE69114783T patent/DE69114783T2/en not_active Expired - Fee Related
- 1991-08-12 EP EP91113497A patent/EP0471321B1/en not_active Expired - Lifetime
Patent Citations (1)
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)
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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