EP2143956A3 - Machine de traitement des écoulements dotée d'une rainure sur la trajectoire d'une extrémité d'aube - Google Patents

Machine de traitement des écoulements dotée d'une rainure sur la trajectoire d'une extrémité d'aube Download PDF

Info

Publication number
EP2143956A3
EP2143956A3 EP09007629.0A EP09007629A EP2143956A3 EP 2143956 A3 EP2143956 A3 EP 2143956A3 EP 09007629 A EP09007629 A EP 09007629A EP 2143956 A3 EP2143956 A3 EP 2143956A3
Authority
EP
European Patent Office
Prior art keywords
groove
blade end
gap
work machine
flow work
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Withdrawn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
EP09007629.0A
Other languages
German (de)
English (en)
Other versions
EP2143956A2 (fr
Inventor
Volker Dr. Gümmer
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.)
Rolls Royce Deutschland Ltd and Co KG
Original Assignee
Rolls Royce Deutschland Ltd and Co KG
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 Rolls Royce Deutschland Ltd and Co KG filed Critical Rolls Royce Deutschland Ltd and Co KG
Publication of EP2143956A2 publication Critical patent/EP2143956A2/fr
Publication of EP2143956A3 publication Critical patent/EP2143956A3/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • F04D29/526—Details of the casing section radially opposing blade tips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • F04D29/685—Inducing localised fluid recirculation in the stator-rotor interface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP09007629.0A 2008-07-07 2009-06-09 Machine de traitement des écoulements dotée d'une rainure sur la trajectoire d'une extrémité d'aube Withdrawn EP2143956A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008031982A DE102008031982A1 (de) 2008-07-07 2008-07-07 Strömungsarbeitsmaschine mit Nut an einem Laufspalt eines Schaufelendes

Publications (2)

Publication Number Publication Date
EP2143956A2 EP2143956A2 (fr) 2010-01-13
EP2143956A3 true EP2143956A3 (fr) 2015-03-18

Family

ID=41037780

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09007629.0A Withdrawn EP2143956A3 (fr) 2008-07-07 2009-06-09 Machine de traitement des écoulements dotée d'une rainure sur la trajectoire d'une extrémité d'aube

Country Status (3)

Country Link
US (1) US8257022B2 (fr)
EP (1) EP2143956A3 (fr)
DE (1) DE102008031982A1 (fr)

Families Citing this family (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9812047B2 (en) * 2010-02-25 2017-11-07 Manufacturing Resources International, Inc. System and method for remotely monitoring the operating life of electronic displays
US9816522B2 (en) * 2010-02-09 2017-11-14 Ihi Corporation Centrifugal compressor having an asymmetric self-recirculating casing treatment
JP5430685B2 (ja) * 2010-02-09 2014-03-05 株式会社Ｉｈｉ 非軸対称自己循環ケーシングトリートメントを有する遠心圧縮機
US9234526B2 (en) * 2010-02-09 2016-01-12 Tsinghua University Centrifugal compressor having an asymmetric self-recirculating casing treatment
US9151297B2 (en) * 2010-02-09 2015-10-06 Ihi Corporation Centrifugal compressor having an asymmetric self-recirculating casing treatment
US8550768B2 (en) * 2010-06-08 2013-10-08 Siemens Energy, Inc. Method for improving the stall margin of an axial flow compressor using a casing treatment
JP5895343B2 (ja) 2011-01-24 2016-03-30 株式会社Ihi 遠心圧縮機及び遠心圧縮機の製造方法
DE102011006275A1 (de) 2011-03-28 2012-10-04 Rolls-Royce Deutschland Ltd & Co Kg Stator einer Axialverdichterstufe einer Turbomaschine
DE102011006273A1 (de) 2011-03-28 2012-10-04 Rolls-Royce Deutschland Ltd & Co Kg Rotor einer Axialverdichterstufe einer Turbomaschine
DE102011007767A1 (de) * 2011-04-20 2012-10-25 Rolls-Royce Deutschland Ltd & Co Kg Strömungsmaschine
FR2981131B1 (fr) * 2011-10-07 2013-11-01 Turbomeca Compresseur centrifuge equipe d'un marqueur de mesure d'usure et procede de suivi d'usure utilisant ce marqueur
US9068507B2 (en) * 2011-11-16 2015-06-30 General Electric Company Compressor having purge circuit and method of purging
JP5853721B2 (ja) * 2012-01-23 2016-02-09 株式会社Ihi 遠心圧縮機
FR2989742B1 (fr) 2012-04-19 2014-05-09 Snecma Carter de compresseur a cavites a forme amont optimisee
CN104395582B (zh) 2012-07-26 2017-08-11 博格华纳公司 具有圆周槽的压缩机盖件
EP2971547B1 (fr) * 2013-03-12 2020-01-01 United Technologies Corporation Stator en porte-à-faux comportant une caractéristique de déclenchement de tourbillon
US9644639B2 (en) * 2014-01-27 2017-05-09 Pratt & Whitney Canada Corp. Shroud treatment for a centrifugal compressor
EP2927503B1 (fr) 2014-04-03 2023-05-17 MTU Aero Engines AG Compresseur de turbine à gaz, moteur d'avion et méthode de dimensionnement
EP3177811B1 (fr) * 2014-08-08 2021-07-21 Siemens Energy Global GmbH & Co. KG Compresseur d'une turbine à gaz
US10465716B2 (en) * 2014-08-08 2019-11-05 Pratt & Whitney Canada Corp. Compressor casing
CN104279181B (zh) * 2014-09-26 2017-06-06 清华大学 离心泵叶轮
US20160153465A1 (en) * 2014-12-01 2016-06-02 General Electric Company Axial compressor endwall treatment for controlling leakage flow therein
US10539154B2 (en) 2014-12-10 2020-01-21 General Electric Company Compressor end-wall treatment having a bent profile
US10107307B2 (en) 2015-04-14 2018-10-23 Pratt & Whitney Canada Corp. Gas turbine engine rotor casing treatment
CA2955646A1 (fr) 2016-01-19 2017-07-19 Pratt & Whitney Canada Corp. Boitier d'aube de rotor de turbine a gaz
FR3065482B1 (fr) * 2017-04-20 2019-07-05 Safran Aircraft Engines Element d'anneau d'etancheite pour turbine comportant une cavite inclinee dans un materiau abradable
DE102018203304A1 (de) * 2018-03-06 2019-09-12 MTU Aero Engines AG Gasturbinenverdichter
CN108506249B (zh) * 2018-04-02 2020-03-10 华能国际电力股份有限公司 一种用于轴流压气机的槽类端壁处理方法
US10876423B2 (en) 2018-12-28 2020-12-29 Honeywell International Inc. Compressor section of gas turbine engine including hybrid shroud with casing treatment and abradable section
US10914318B2 (en) 2019-01-10 2021-02-09 General Electric Company Engine casing treatment for reducing circumferentially variable distortion
US11015465B2 (en) * 2019-03-25 2021-05-25 Honeywell International Inc. Compressor section of gas turbine engine including shroud with serrated casing treatment
US11078805B2 (en) 2019-04-15 2021-08-03 Raytheon Technologies Corporation Inclination of forward and aft groove walls of casing treatment for gas turbine engine
EP3734081A1 (fr) * 2019-04-30 2020-11-04 Borgwarner Inc. Dispositif de modification de flux pour compresseurs
JP2021124069A (ja) * 2020-02-06 2021-08-30 三菱重工業株式会社 コンプレッサハウジング、該コンプレッサハウジングを備えるコンプレッサ、および該コンプレッサを備えるターボチャージャ
US20230151825A1 (en) * 2021-11-17 2023-05-18 Pratt & Whitney Canada Corp. Compressor shroud with swept grooves
CN114857086A (zh) * 2022-04-20 2022-08-05 新奥能源动力科技（上海）有限公司 一种轴流压气机及燃气轮机
US12078070B1 (en) 2023-08-16 2024-09-03 Rolls-Royce North American Technologies Inc. Adjustable air flow plenum with sliding doors for a fan of a gas turbine engine
US12018621B1 (en) 2023-08-16 2024-06-25 Rolls-Royce North American Technologies Inc. Adjustable depth tip treatment with rotatable ring with pockets for a fan of a gas turbine engine
US12066035B1 (en) 2023-08-16 2024-08-20 Rolls-Royce North American Technologies Inc. Adjustable depth tip treatment with axial member with pockets for a fan of a gas turbine engine
US11965528B1 (en) 2023-08-16 2024-04-23 Rolls-Royce North American Technologies Inc. Adjustable air flow plenum with circumferential movable closure for a fan of a gas turbine engine
US11970985B1 (en) 2023-08-16 2024-04-30 Rolls-Royce North American Technologies Inc. Adjustable air flow plenum with pivoting vanes for a fan of a gas turbine engine
US12085021B1 (en) 2023-08-16 2024-09-10 Rolls-Royce North American Technologies Inc. Adjustable air flow plenum with movable closure for a fan of a gas turbine engine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1008758A2 (fr) * 1998-12-10 2000-06-14 United Technologies Corporation Compresseurs à fluide

Family Cites Families (59)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE889506C (de) 1940-09-25 1953-09-10 Versuchsanstalt Fuer Luftfahrt Stroemungsmaschine mit Grenzschichtabsaugung
GB619722A (en) 1946-12-20 1949-03-14 English Electric Co Ltd Improvements in and relating to boundary layer control in fluid conduits
US2933238A (en) * 1954-06-24 1960-04-19 Edward A Stalker Axial flow compressors incorporating boundary layer control
GB799675A (en) 1955-10-13 1958-08-13 Bristol Aeroengines Ltd Improvements in or relating to axial flow gas compressors and turbines
US3066912A (en) * 1961-03-28 1962-12-04 Gen Electric Turbine erosion protective device
CH437614A (de) 1963-07-02 1967-11-30 Moravec Zdenek Strömungsmaschine mit verminderter Geräuscherzeugung
GB987625A (en) 1963-10-14 1965-03-31 Rolls Royce Improvements in or relating to axial flow compressors, for example for aircraft gas turbine engines
US3572960A (en) * 1969-01-02 1971-03-30 Gen Electric Reduction of sound in gas turbine engines
DE1938132A1 (de) * 1969-07-26 1971-01-28 Daimler Benz Ag Leitschaufeln von Axialverdichtern
FR2166494A5 (fr) * 1971-12-27 1973-08-17 Onera (Off Nat Aerospatiale)
US3849023A (en) * 1973-06-28 1974-11-19 Gen Electric Stator assembly
FR2248732A5 (fr) * 1973-10-23 1975-05-16 Onera (Off Nat Aerospatiale)
US4155680A (en) * 1977-02-14 1979-05-22 General Electric Company Compressor protection means
GB2017228B (en) * 1977-07-14 1982-05-06 Pratt & Witney Aircraft Of Can Shroud for a turbine rotor
FR2491549B1 (fr) * 1980-10-08 1985-07-05 Snecma Dispositif de refroidissement d'une turbine a gaz, par prelevement d'air au niveau du compresseur
US4479755A (en) * 1982-04-22 1984-10-30 A/S Kongsberg Vapenfabrikk Compressor boundary layer bleeding system
DE3407945A1 (de) 1984-03-03 1985-09-05 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Verfahren und mittel zur vermeidung der entstehung von titanfeuer
DE3407946A1 (de) * 1984-03-03 1985-09-05 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Einrichtung zur verhinderung der ausbreitung von titanfeuer bei turbomaschinen, insbesondere gasturbinen- bzw. gasturbinenstrahltriebwerken
US5059093A (en) * 1990-06-07 1991-10-22 United Technologies Corporation Compressor bleed port
US5203162A (en) * 1990-09-12 1993-04-20 United Technologies Corporation Compressor bleed manifold for a gas turbine engine
JPH04132899A (ja) * 1990-09-25 1992-05-07 Mitsubishi Heavy Ind Ltd 軸流送風機
DE69204861T2 (de) * 1991-01-30 1996-05-23 United Technologies Corp Ventilatorgehäuse mit Rezirculationskanälen.
US5327716A (en) * 1992-06-10 1994-07-12 General Electric Company System and method for tailoring rotor tip bleed air
RU2034175C1 (ru) * 1993-03-11 1995-04-30 Центральный институт авиационного моторостроения им.П.И.Баранова Турбокомпрессор
US5431533A (en) * 1993-10-15 1995-07-11 United Technologies Corporation Active vaned passage casing treatment
US5480284A (en) * 1993-12-20 1996-01-02 General Electric Company Self bleeding rotor blade
US5562404A (en) * 1994-12-23 1996-10-08 United Technologies Corporation Vaned passage hub treatment for cantilever stator vanes
US5474417A (en) * 1994-12-29 1995-12-12 United Technologies Corporation Cast casing treatment for compressor blades
US5607284A (en) 1994-12-29 1997-03-04 United Technologies Corporation Baffled passage casing treatment for compressor blades
JP3816150B2 (ja) 1995-07-18 2006-08-30 株式会社荏原製作所 遠心流体機械
US5762034A (en) * 1996-01-16 1998-06-09 Board Of Trustees Operating Michigan State University Cooling fan shroud
DE19632207A1 (de) 1996-08-09 1998-02-12 Bmw Rolls Royce Gmbh Verfahren zur Verhinderung der laminaren Grenzschicht-Ablösung an Turbomaschinen-Schaufeln
US6109868A (en) * 1998-12-07 2000-08-29 General Electric Company Reduced-length high flow interstage air extraction
US6574965B1 (en) 1998-12-23 2003-06-10 United Technologies Corporation Rotor tip bleed in gas turbine engines
US6290458B1 (en) * 1999-09-20 2001-09-18 Hitachi, Ltd. Turbo machines
US6234747B1 (en) * 1999-11-15 2001-05-22 General Electric Company Rub resistant compressor stage
DE10135003C1 (de) * 2001-07-18 2002-10-02 Mtu Aero Engines Gmbh Verdichtergehäusestruktur
US6585479B2 (en) 2001-08-14 2003-07-01 United Technologies Corporation Casing treatment for compressors
US6663346B2 (en) * 2002-01-17 2003-12-16 United Technologies Corporation Compressor stator inner diameter platform bleed system
WO2003072949A1 (fr) * 2002-02-28 2003-09-04 Mtu Aero Engines Gmbh Moyens de traitement antiblocage d'extremites pour turbocompresseurs
DE10233032A1 (de) * 2002-07-20 2004-01-29 Rolls-Royce Deutschland Ltd & Co Kg Strömungsarbeitsmaschine mit integriertem Fluidzirkulationssystem
GB0216952D0 (en) * 2002-07-20 2002-08-28 Rolls Royce Plc Gas turbine engine casing and rotor blade arrangement
ATE325939T1 (de) * 2002-08-23 2006-06-15 Mtu Aero Engines Gmbh Rezirkulationsstruktur für turboverdichter
DE10330084B4 (de) 2002-08-23 2010-06-10 Mtu Aero Engines Gmbh Rezirkulationsstruktur für Turboverdichter
FR2846034B1 (fr) * 2002-10-22 2006-06-23 Snecma Moteurs Carter, compresseur, turbine et turbomoteur a combustion comprenant un tel carter
GB2408546B (en) 2003-11-25 2006-02-22 Rolls Royce Plc A compressor having casing treatment slots
DE10355241A1 (de) * 2003-11-26 2005-06-30 Rolls-Royce Deutschland Ltd & Co Kg Strömungsarbeitsmaschine mit Fluidzufuhr
DE10355240A1 (de) * 2003-11-26 2005-07-07 Rolls-Royce Deutschland Ltd & Co Kg Strömungsarbeitsmaschine mit Fluidentnahme
US7097414B2 (en) * 2003-12-16 2006-08-29 Pratt & Whitney Rocketdyne, Inc. Inducer tip vortex suppressor
GB2413158B (en) * 2004-04-13 2006-08-16 Rolls Royce Plc Flow control arrangement
DE102004030597A1 (de) * 2004-06-24 2006-01-26 Rolls-Royce Deutschland Ltd & Co Kg Strömungsarbeitsmaschine mit Aussenradstrahlerzeugung am Stator
DE102004043036A1 (de) 2004-09-06 2006-03-09 Rolls-Royce Deutschland Ltd & Co Kg Strömungsarbeitsmaschine mit Fluidentnahme
DE102004055439A1 (de) * 2004-11-17 2006-05-24 Rolls-Royce Deutschland Ltd & Co Kg Strömungsarbeitsmaschine mit dynamischer Strömungsbeeinflussung
US7861823B2 (en) * 2005-11-04 2011-01-04 United Technologies Corporation Duct for reducing shock related noise
GB0600532D0 (en) * 2006-01-12 2006-02-22 Rolls Royce Plc A blade and rotor arrangement
EP1862641A1 (fr) * 2006-06-02 2007-12-05 Siemens Aktiengesellschaft Canal d'écoulement axial pour turbomachine
US20080044273A1 (en) * 2006-08-15 2008-02-21 Syed Arif Khalid Turbomachine with reduced leakage penalties in pressure change and efficiency
FR2912789B1 (fr) * 2007-02-21 2009-10-02 Snecma Sa Carter avec traitement de carter, compresseur et turbomachine comportant un tel carter.
US20090160135A1 (en) * 2007-12-20 2009-06-25 Gabriele Turini Labyrinth seal with reduced leakage flow by grooves and teeth synergistic action

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1008758A2 (fr) * 1998-12-10 2000-06-14 United Technologies Corporation Compresseurs à fluide

Also Published As

Publication number Publication date
EP2143956A2 (fr) 2010-01-13
US8257022B2 (en) 2012-09-04
DE102008031982A1 (de) 2010-01-14
US20100014956A1 (en) 2010-01-21

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