EP0769106A1 - Verfahren zum betreiben einer strahlpumpe sowie eine strahlpumpe selber - Google Patents
Verfahren zum betreiben einer strahlpumpe sowie eine strahlpumpe selberInfo
- Publication number
- EP0769106A1 EP0769106A1 EP95924858A EP95924858A EP0769106A1 EP 0769106 A1 EP0769106 A1 EP 0769106A1 EP 95924858 A EP95924858 A EP 95924858A EP 95924858 A EP95924858 A EP 95924858A EP 0769106 A1 EP0769106 A1 EP 0769106A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- jet
- nozzle
- cross
- section
- supersonic
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/46—Arrangements of nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/46—Arrangements of nozzles
- F04F5/465—Arrangements of nozzles with supersonic flow
Definitions
- the invention relates to a method for operating a rod pump with a propellant nozzle, the propellant, in particular steam, at supersonic speed
- the velocity of the flowing fluid is achieved
- Gaseous and vaporous media come into consideration as the driving current medium and as the suction current medium.
- the final speed of a driving gaseous or vaporous medium is considerably greater than the speed of sound in high-power lamps with a high pressure ratio. This is achieved by widening the cross section in the overspill part of the nozzle, whereby potential energy is converted into kinetic energy, combined with a simultaneous pressure drop, usually have
- Overscnalldusen a circular cross-section with a conical or contoured overview part.
- a steam jet pump is known from the document DE 3406260 A1, in which the working steam is expelled from a jet nozzle, which widens towards the end.
- the working steam reaches its critical speed when it passes through the neck part of the nozzle. H. the speed of sound.
- the pressure energy is completely converted into kinetic energy and the steam is expelled into a chamber at supersonic speed.
- the invention has set itself the goal of creating a method for operating a jet pump and a jet pump itself, in which an increase in the mixing of propellant and load medium is achieved with simple constructional means.
- Vortex structures are generated that lead to an improvement in the mixture and expansion of the mixing zone. The interaction of this
- Vortex structures that have an axis of rotation in the direction of flow, with the toroidal vortexes that are usually generated, that is, vortexes with an azimuthal axis of rotation, lead to pulsating unsteady processes. While maintaining the cross-sectional area compared to the respective circular cross-section and thus the secondary mass flow rate and the local state (pressure, temperature, Mach number), the circumferential length of the respective cross-sectional shape is increased. From the circular cross section in The transsonic part of the propellant nozzle becomes downstream in the
- Rounded triangles, squares or polygons for example a 5-sided hexagon, have turbulences downstream of these beads, the axis of rotation of which points in flow direction, with which the mixing process is improved in the difficult case of supersonic mixing.
- speeds of the propellant medium of 4.8 to 5.2 times the speed of sound are achieved with such supersonic nozzles (hypersonic state).
- the bulges or bulges are rounded off in their apex.
- the pressure at the nozzle outlet is a factor of 3 to 5 above the suction pressure of the load medium
- the final cross-section is reduced accordingly; This means that the nozzle length can be shorter by a factor of 0.2 compared to the calculated length with full expansion to the suction pressure.
- FIG 1 shows the arrangement of the entire jet pump
- Figure 3 different cross-sectional shapes.
- Figure 1 shows the arrangement of a in schematic form
- the jet pump 20 has a cylindrical part arranged in series one behind the other
- the nozzle length Xd and the calculated nozzle length are also shown
- the starting temperature TO and the initial pressure PO of the load medium and the final pressure P4 at the outlet of the pump are also shown.
- FIG. 2 shows a diagram of the supersonic drive nozzle 10.
- the neck 12 of the transonic area adjoins the entry of the subsonic part 11, to which an expanding part 13 of the supersonic area adjoins the outlet 14 and thus the
- Nozzle end cross section connects.
- Figure 3 shows the nozzle end section 14 and thus the section C D.
- the circumferential length Lk with a circular cross section is more conventional
- Ultrasonic nozzles are shown in dashed lines. In all examples it is
- Cross-sectional area A of the circular cross section in the case of a conventional supersonic nozzle is the same as that of the nozzle provided with beads.
- the beads 18 are designed in the form of bulges 17.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4425601A DE4425601A1 (de) | 1994-07-06 | 1994-07-06 | Verfahren zum Betreiben einer Strahlpumpe sowie eine Strahlpumpe selber |
DE4425601 | 1994-07-06 | ||
PCT/DE1995/000923 WO1996001374A1 (de) | 1994-07-06 | 1995-07-05 | Verfahren zum betreiben einer strahlpumpe sowie eine strahlpumpe selber |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0769106A1 true EP0769106A1 (de) | 1997-04-23 |
EP0769106B1 EP0769106B1 (de) | 1998-09-23 |
Family
ID=6523626
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95924858A Expired - Lifetime EP0769106B1 (de) | 1994-07-06 | 1995-07-05 | Verfahren zum betreiben einer strahlpumpe sowie eine strahlpumpe selber |
Country Status (7)
Country | Link |
---|---|
US (1) | US5820353A (de) |
EP (1) | EP0769106B1 (de) |
JP (1) | JPH10502426A (de) |
AT (1) | ATE171522T1 (de) |
AU (1) | AU2920995A (de) |
DE (2) | DE4425601A1 (de) |
WO (1) | WO1996001374A1 (de) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6171069B1 (en) * | 1999-07-19 | 2001-01-09 | Mikhail Levitin | Jet pump having a movable piston |
US6375096B1 (en) | 2000-03-01 | 2002-04-23 | Cleveland State University | Two component spray gun and nozzle attachment |
US6434943B1 (en) | 2000-10-03 | 2002-08-20 | George Washington University | Pressure exchanging compressor-expander and methods of use |
US6877960B1 (en) | 2002-06-05 | 2005-04-12 | Flodesign, Inc. | Lobed convergent/divergent supersonic nozzle ejector system |
US6851632B2 (en) * | 2003-01-24 | 2005-02-08 | Spraying Systems Co. | High-pressure cleaning spray nozzle |
US8453997B2 (en) * | 2010-11-20 | 2013-06-04 | Fisonic Holding Limited | Supersonic nozzle |
US8104745B1 (en) * | 2010-11-20 | 2012-01-31 | Vladimir Vladimirovich Fisenko | Heat-generating jet injection |
US9039385B2 (en) | 2011-11-28 | 2015-05-26 | Ford Global Technologies, Llc | Jet pump assembly |
USD717207S1 (en) | 2012-03-13 | 2014-11-11 | Lovan Enterprises, Llc | Decorative accessory article |
US10753373B2 (en) | 2012-12-21 | 2020-08-25 | Piab Aktiebolag | Vacuum ejector nozzle with elliptical diverging section |
GB2509184A (en) | 2012-12-21 | 2014-06-25 | Xerex Ab | Multi-stage vacuum ejector with moulded nozzle having integral valve elements |
GB2509182A (en) | 2012-12-21 | 2014-06-25 | Xerex Ab | Vacuum ejector with multi-nozzle drive stage and booster |
GB2509183A (en) * | 2012-12-21 | 2014-06-25 | Xerex Ab | Vacuum ejector with tripped diverging exit flow nozzle |
GB201418117D0 (en) | 2014-10-13 | 2014-11-26 | Xerex Ab | Handling device for foodstuff |
DE102019109195A1 (de) * | 2019-04-08 | 2020-10-08 | Norma Germany Gmbh | Strahlpumpe |
DE102021207648A1 (de) | 2021-07-19 | 2023-01-19 | Ekpo Fuel Cell Technologies Gmbh | Strahlpumpe und Brennstoffzellensystem |
WO2024209426A1 (en) * | 2023-04-07 | 2024-10-10 | Eaton Intelligent Power Limited | Ejector for hydrogen recirculation system |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE428882C (de) * | 1923-10-10 | 1926-05-14 | Dirk Christiaan Endert Jr | Ejektor |
FR716432A (fr) * | 1931-05-01 | 1931-12-21 | éjecteur-élévateur de liquides fonctionnant au moyen d'air comprimé | |
US2486019A (en) * | 1943-01-11 | 1949-10-25 | Daniel And Florence Guggenheim | Jet control apparatus applicable to entrainment of fluids |
US3143293A (en) * | 1961-04-13 | 1964-08-04 | Universal Oil Prod Co | Variable-area nozzle |
DE1503718A1 (de) * | 1966-06-02 | 1971-03-04 | Wiegand Apparatebau Gmbh | Einrichtung zur Laermverminderung von Gasstrahl-Ventilatoren |
FR1535517A (fr) * | 1967-05-30 | 1968-08-09 | Ejecteurs supersoniques perfectionnés | |
US3774846A (en) * | 1969-12-31 | 1973-11-27 | Sonic Dev Corp | Pressure wave atomizing apparatus |
DE3406260A1 (de) * | 1984-02-21 | 1985-08-29 | Chlorine Engineers Corp., Ltd., Tokio/Tokyo | Dampfstrahlpumpe |
US4835961A (en) * | 1986-04-30 | 1989-06-06 | United Technologies Corporation | Fluid dynamic pump |
-
1994
- 1994-07-06 DE DE4425601A patent/DE4425601A1/de not_active Ceased
-
1995
- 1995-07-05 AU AU29209/95A patent/AU2920995A/en not_active Abandoned
- 1995-07-05 AT AT95924858T patent/ATE171522T1/de not_active IP Right Cessation
- 1995-07-05 US US08/765,389 patent/US5820353A/en not_active Expired - Fee Related
- 1995-07-05 WO PCT/DE1995/000923 patent/WO1996001374A1/de active IP Right Grant
- 1995-07-05 EP EP95924858A patent/EP0769106B1/de not_active Expired - Lifetime
- 1995-07-05 DE DE59503718T patent/DE59503718D1/de not_active Expired - Fee Related
- 1995-07-05 JP JP8503627A patent/JPH10502426A/ja active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO9601374A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1996001374A1 (de) | 1996-01-18 |
US5820353A (en) | 1998-10-13 |
EP0769106B1 (de) | 1998-09-23 |
DE59503718D1 (de) | 1998-10-29 |
JPH10502426A (ja) | 1998-03-03 |
DE4425601A1 (de) | 1996-01-18 |
ATE171522T1 (de) | 1998-10-15 |
AU2920995A (en) | 1996-01-25 |
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