EP0719945A1 - Pompe à jet mélangeuse ondulée - Google Patents

Pompe à jet mélangeuse ondulée Download PDF

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Publication number
EP0719945A1
EP0719945A1 EP95120233A EP95120233A EP0719945A1 EP 0719945 A1 EP0719945 A1 EP 0719945A1 EP 95120233 A EP95120233 A EP 95120233A EP 95120233 A EP95120233 A EP 95120233A EP 0719945 A1 EP0719945 A1 EP 0719945A1
Authority
EP
European Patent Office
Prior art keywords
jet pump
corrugated
mixing
low
ogive
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Withdrawn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
EP95120233A
Other languages
German (de)
English (en)
Inventor
Gary E. Tuttle
Sen Y. Meng
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Boeing North American Inc
Original Assignee
Rockwell International Corp
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
Application filed by Rockwell International Corp filed Critical Rockwell International Corp
Publication of EP0719945A1 publication Critical patent/EP0719945A1/fr
Withdrawn legal-status Critical Current

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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
    • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • F04F5/24—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing liquids, e.g. containing solids, or liquids and elastic fluids

Definitions

  • the invention relates in general to the field of jet pump design. Specifically, the invention describes a jet pump design that utilizes a variable corrugated ogive to enhance fluid mixing and, therefore, the operational efficiency of the pump.
  • jet pump technology is in combination (series) with a standard rotary pump where the available net positive suction head is low.
  • a jet pump can be used to increase the pressure of a low pressure fluid to provide the necessary head for a standard (e.g., rotary) pump.
  • a standard e.g., rotary
  • jet pumps are used as "booster" pumps; they 'boost' the pressure of a low pressure fluid so that it may be pumped by a standard pump.
  • a well known function of traditional jet pump technology is to transfer kinetic energy from a high-energy (high velocity, high pressure) fluid (HEF) to a low-energy (low velocity, low pressure) fluid (LEF).
  • HEF high-energy
  • LEF low-energy
  • Energy transferred into the LEF is stored in the form of potential energy and results in an increase in the fluid's pressure.
  • Energy transfer, and therefore jet pump efficiency, is enhanced by a thorough mixing of the low- and high-energy fluids.
  • a jet pump utilizing said enhanced mixing apparatus is referred to as a corrugated jet pump.
  • a corrugated jet pump incorporates a corrugated annular nozzle ogive that, during pumping operations, creates alternating low and high velocity zones in the ogive of the nozzle. These different velocity zones propagate shear planes that enhance the jet pumps downstream mixing. At the same time the core, or central portion, of the corrugated annular nozzle ring creates alternating vortices in the low- and high-energy fluids which also enhances mixing.
  • the corrugated annular nozzle incorporates composite laminates for its fabrication. Advantages of the corrugated jet pump design include: (1) an overall reduction in boost pump length of as much as 75%, (2) a tremendous weight savings, and (3) significantly reduced production manufacturing costs.
  • Figure 1 is a cross-sectional view of one embodiment of the invention.
  • Figure 2 is an end-view of one embodiment of the invention.
  • Figure 3 is a cut-away view of fluid mixing within one embodiment of a corrugated jet pump.
  • Figure 4 is another cross-sectional view of an annular two-corrugation embodiment of the invention.
  • cryogenic fluids e.g., liquid oxygen (LOX) or liquid hydrogen (H 2 ).
  • LOX liquid oxygen
  • H 2 liquid hydrogen
  • high-energy fluid 90 is injected into a corrugated jet pump via a volute, or constant velocity manifold 100.
  • Low-energy fluid 80 can be provided from a storage tank (not shown) and enters the corrugated jet pump at the main inlet 105. After the HEF is injected into the LEF's path, via an injection nozzle 110, the two fluids begin to mix after leaving the corrugated annular nozzle ogive 115.
  • the velocity of the fluid in the corrugate's valley regions 120 is less than the velocity of the fluid in the corrugate's crown regions 125.
  • These regions of differing velocity set up shear planes within the fluid (comprised of low- and high-energy fluids), thereby enhancing the jet pump's mixing action.
  • the shear planes also generate vortices; two vortices per crown region. These vortices, or swirling actions, further enhance the jet pump's mixing action, as indicated by arrows 150.
  • the nozzle ogive has a constant cross-sectional area. This is analogous to a piece of cardboard, no matter where you cut a flat piece of cardboard the inner structure is constant. That is, no matter where along a conventional ogive you look, its cross-sectional area is constant.
  • the corrugated annular nozzle ogive of the invention exhibits a position dependent cross-sectional area. For instance, the magnitude of the valley-to-crown distance at cut 130 is less than the magnitude of the valley-to-crown distance at cut 135. Thus, the area of the nozzle's throat 140 is less than the area of the nozzle's exit 145.
  • the invention's fluctuating geometry imparts differing velocities into the low and high energy fluids which creates shear planes and, thereby, improves the ability of a jet pump to mix the two fluids.
  • Figure 3 is a straight embodiment for which numeric designators retain previous definitions. This embodiment uses two sets of corrugations 115. Efficient mixing is indicated by arrows 150.
  • a jet pump in accordance with the invention may have two concentric rings of corrugated nozzles 115 that efficiently mix high 90 and low 80 energy fluids. As previously mentioned, this two-ring configuration can decrease the required length for efficient mixing, indicated by arrows 150 (Fig. 3), thus minimizing the size (length) and weight of the jet pump system.
  • An exemplary jet pump in accordance with the invention has a discrete mass flow rate, ⁇ , ratio between the HEF ( ⁇ HEF ) and LEF ( ⁇ LEF ) which is dependent on the pressure differential between the two fluids and the required net positive suction head of the rotary pump for which the jet pump is a booster.
  • the mass flow rates of the two fluids typically depend upon the required head of the rotary pump and the location where the HEF source is tapped off, i.e., where the HEF source is tapped off relative to the jet pump's injection nozzle 110.
  • the mass flow rate and the pressure difference between the HEF and LEF define the fluid velocities of the two streams and dictate the cross-sectional areas of the nozzle jets 140 and the LEF suction (inlet) port 105.
  • the aforementioned areas can utilize any variation of geometry's, e.g., circular or rectangular.
  • the operational velocities of the HEF and LEF are, in part, determined by the pressure difference between the two fluids and can be determined by means of a hydrodynamic analysis which takes into account head and line loss and acceleration within the nozzle.
  • the location and configuration of the corrugated nozzle jets is a variable and depends upon the allowable mixing length (usually between 0.5 and 1.5 inlet flow diameters) and the required pump performance.
  • the circumferential spacing 200 (Fig. 2), the amplitude of the corrugates 205 and the throat to exit area ratio of the nozzle ( ⁇ ) is set to maximize mixing effectiveness.
  • the relative spacing of the two nozzle rings is set to eliminate reverse flow in the center of the mixing region.
  • the thickness of the corrugations is dependent on the pressure difference between the HEF and LEF, the throat to exit area ratio of the nozzle ( ⁇ ), the nozzle's attachment scheme and the material used to form the corrugated nozzle. Material selection depends on the type of fluids being pumped.
  • a jet pump in accordance with the invention can be positioned as close as one-half of the flow diameter to the inlet of the rotary pump. As one of ordinary skill in the field would understand, the actual position is dependent upon the specific system requirements.

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)
EP95120233A 1994-12-28 1995-12-20 Pompe à jet mélangeuse ondulée Withdrawn EP0719945A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US36538694A 1994-12-28 1994-12-28
US365386 1994-12-28

Publications (1)

Publication Number Publication Date
EP0719945A1 true EP0719945A1 (fr) 1996-07-03

Family

ID=23438689

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95120233A Withdrawn EP0719945A1 (fr) 1994-12-28 1995-12-20 Pompe à jet mélangeuse ondulée

Country Status (2)

Country Link
EP (1) EP0719945A1 (fr)
JP (1) JPH08232899A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100316493A1 (en) * 2007-03-23 2010-12-16 Flodesign Wind Turbine Corporation Turbine with mixers and ejectors
US20110002781A1 (en) * 2007-03-23 2011-01-06 Flodesign Wind Turbine Corporation Wind turbine with pressure profile and method of making same
US20110058937A1 (en) * 2007-03-23 2011-03-10 Flodesign Wind Turbine Corporation Nacelle configurations for a shrouded wind turbine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4844236B2 (ja) * 2005-12-20 2011-12-28 ソニー株式会社 ノズル、噴流発生装置、冷却装置及び電子機器
JP2016200088A (ja) * 2015-04-13 2016-12-01 三菱重工メカトロシステムズ株式会社 エゼクタ及びこれを有する高空燃焼試験排気設備
JP6543809B2 (ja) * 2015-12-22 2019-07-17 パナソニックＩｐマネジメント株式会社 送風装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU449177A1 (ru) * 1969-12-31 1974-11-05 Одесский Ордена Трудового Красного Знамени Государственный Университет Им.И.И.Мечникова Струйный насос
DE3239197A1 (de) * 1981-11-03 1983-05-11 Rolls-Royce Ltd., London Infrarotstrahlungs-unterdrueckungsvorrichtung fuer ein gasturbinentriebwerk
GB2260369A (en) * 1991-08-30 1993-04-14 United Technologies Corp Jet propulsion system having ejector shroud

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU449177A1 (ru) * 1969-12-31 1974-11-05 Одесский Ордена Трудового Красного Знамени Государственный Университет Им.И.И.Мечникова Струйный насос
DE3239197A1 (de) * 1981-11-03 1983-05-11 Rolls-Royce Ltd., London Infrarotstrahlungs-unterdrueckungsvorrichtung fuer ein gasturbinentriebwerk
GB2114229A (en) * 1981-11-03 1983-08-17 Rolls Royce Gas turbine engine infra-red radiation suppressor
GB2260369A (en) * 1991-08-30 1993-04-14 United Technologies Corp Jet propulsion system having ejector shroud

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section PQ Week 7634, Derwent World Patents Index; Class Q56, AN 76-h5247x, XP002001865 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100316493A1 (en) * 2007-03-23 2010-12-16 Flodesign Wind Turbine Corporation Turbine with mixers and ejectors
US20110002781A1 (en) * 2007-03-23 2011-01-06 Flodesign Wind Turbine Corporation Wind turbine with pressure profile and method of making same
US20110058937A1 (en) * 2007-03-23 2011-03-10 Flodesign Wind Turbine Corporation Nacelle configurations for a shrouded wind turbine
US8657572B2 (en) * 2007-03-23 2014-02-25 Flodesign Wind Turbine Corp. Nacelle configurations for a shrouded wind turbine

Also Published As

Publication number Publication date
JPH08232899A (ja) 1996-09-10

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