[특허]Air fuel mixer for gas turbine combustor having slots at downstream end of mixing duct

[미국특허] Air fuel mixer for gas turbine combustor having slots at downstream end of mixing duct 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F23R-003/32
출원번호	US-0311639 (1994-09-23)
발명자 / 주소	Joshi Narendra D. (Cincinnati OH) Epstein Michael J. (West Chester OH)
출원인 / 주소	General Electric Company (Cincinnati OH 02)
인용정보	피인용 횟수 : 34 인용 특허 : 6

초록 ▼

An air fuel mixer is disclosed having a mixing duct, a set of inner and outer counter-rotating swirlers adjacent the upstream end of the mixing duct, and a hub separating the inner and outer swirlers to allow independent rotation thereof, wherein high pressure air from a compressor is injected into the mixing duct through the swirlers to form an intense shear region and fuel is injected into the mixing duct so that the high pressure air and the fuel is uniformly mixed therein so as to produce minimal formation of pollutants when the fuel/air mixture is exhausted out the downstream end of the mixing duct into the combustor and ignited. In addition, the mixing duct of the mixer includes slots, preferably with flares associated therewith, at its downstream end which modify the shape and direction of mixing eddies emanating therefrom.

대표청구항 ▼

An apparatus for premixing fuel and air prior to combustion in a gas turbine engine, comprising: (a) a mixing duct having a circular cross-section defined by an annular wall, said mixing duct including an upstream end and a downstream end with a longitudinal axis extending therethrough, wherein said mixing duct downstream end has a plurality of spaced flared portions formed therein, each of said flared portions further comprising: (1) an upstream wall flared radially outward from said annular wall; and (2) a pair of radial side walls located adjacent to each side of said upstream wall and connecting said upstream wall to said annular wall, wherein downstream corners are defined at the intersection of said upstream wall and said radial side walls adjacent said downstream end of said mixing duct; (b) means for providing fuel to said mixing duct; (c) a set of radially inner and outer annular counter-rotating swirlers adjacent said upstream end of said mixing duct for imparting swirl to an air stream; and (d) a hub separating said radially inner and outer annular swirlers to allow independent rotation thereof; wherein high pressure air from a compressor is injected into said mixing duct through said swirlers to form an intense shear region and fuel is injected into said mixing duct so that the high pressure air and the fuel is uniformly mixed therein so as to produce minimal formation of pollutants when a fuel/air mixture is exhausted out the downstream end of the mixing duct into the combustor and ignited; and wherein said flared portions adjacent said downstream end of said mixing duct permit a portion of said fuel/air mixture to start preturning radially outward prior to said mixing duct downstream end and causes a secondary vortical flow of said fuel/air mixture which has a centerline anchored to each of said downstream corners formed by said upstream wall and said radial side walls.

이 특허에 인용된 특허 (6) 인용/피인용 타임라인 분석

Joshi Narendra D. (Cincinnati OH) Ekstedt Edward E. (Montgomery OH) Epstein Michael J. (West Chester OH), Air fuel mixer for gas turbine combustor.
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Joshi Narendra D. (Maineville OH) Ekstedt Edward E. (Montgomery OH), Air fuel mixer for gas turbine combustor.
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Lefebvre ; Denis, Flame retention head assembly.
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Carlisle Denis Richard (Risley EN), Fuel burners.
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Voorheis Temple S. (Atherton CA), High efficiency, low NOX emitting, staged combustion burner.
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Chyou Yau-Pin (Taipei TWX) Eroglu Adnan (Untersiggenthal CHX), Mixing apparatus with vortex generating devices.
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이 특허를 인용한 특허 (34) 인용/피인용 타임라인 분석

Angel Paul R. ; Caldwell James M. ; Joshi Narendra D. ; Marakovits Steven ; Foresman Kelley A. ; Goebel Steven G. ; Warren ; Jr. Richard E., Air fuel mixer for gas turbine combustor.
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Li, Suhui; Joshi, Narendra Digamber; McManus, Keith Robert, Air fuel premixer for low emissions gas turbine combustor.
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Blomeyer,Malte, Burner apparatus for burning fuel and air.
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Johnson,Thomas Edward; Widener,Stanley Kevin; McMahan,Kevin Weston, Burner tube and method for mixing air and gas in a gas turbine engine.
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Dobbeling Klaus,CHX ; Griffin Timothy,CHX ; Knopfel Hans Peter,CHX, Combustion chamber.
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Leparoux, Julien Marc Matthieu; Burguburu, Joseph Jean Marie, Combustion chamber comprising additional injection devices opening up directly into corner recirculation zones, turbomachine comprising such a chamber and fuel supply method for such a chamber.
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Hughes, Michael John; Boardman, Gregory Allen; McConnaughhay, Johnie Franklin; Arguinzoni, Carlo Antonio, Combustor cap having non-round outlets for mixing tubes.
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Zelina Joseph ; Myers Geoffrey D. ; Srinivasan Ram ; Reynolds Robert S., Combustor with fuel preparation chambers.
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Winkler, Anton; Benz, Urs; Theuer, Andre; Lauffer, Diane; Poyyapakkam, Madhavan, Cooling scheme for an increased gas turbine efficiency.
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Becker Bernard,DEX, Device for and method of burning a fuel in air.
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Popovic, Predrag; Baruah, Abinash, Diffusion nozzles for low-oxygen fuel nozzle assembly and method.
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Fritz, Jassin; Ast, Gabor, Fuel injector.
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Uhm, Jong Ho; Johnson, Thomas Edward, Fuel nozzle assembly for use in turbine engines and methods of assembling same.
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Chin, Jushan; Rizk, Nader K.; Razdan, Mohan K.; Marshall, Andre W., Fuel premixing module for gas turbine engine combustor.
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Zupanc,Frank J.; Yankowich,Paul R., Fuel-air mixing apparatus for reducing gas turbine combustor exhaust emissions.
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Oskam, Gareth W., Gas turbine and fuel injector for the same.
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Popovic, Predrag; Baruah, Abinash; Kraemer, Gilbert Otto; Ross, William Thomas, Gas turbine combustor having a fuel nozzle for flame anchoring.
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Scarinci, Tomas, Gas turbine engine mixing duct and method to start the engine.
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Scarinci, Tomas, Gas turbine engine mixing duct and method to start the engine.
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Scarinci, Thomas; Young, Kenneth James, Gas turbine engine premix injectors.
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Oskam, Gareth W., Lean direct fuel injector.
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Frank J. Zupanc ; Rudolph Dudebout ; John J. Lipinski ; Ram Srinivasan, Low cost, low emissions natural gas combustor.
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Xu,Jun; Held,Timothy James, Method and apparatus for decreasing combustor acoustics.
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Oskam, Gareth W., Method of operating a gas turbine engine.
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Hughes, Michael John, Multi-tube fuel nozzle with mixing features.
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Gutmark, Ephraim; Paschereit, Christian Oliver; Weisenstein, Wolfgang, Premix burner.
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Poyyapakkam, Madhavan; Winkler, Anton; Syed, Khawar; Ciani, Andrea, Premixed burner for a gas turbine combustor.
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Poyyapakkam, Madhavan; Winkler, Anton; Syed, Khawar; Eroglu, Adnan; Ciani, Andrea, Reheat burner injection system.
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Syed, Khawar; Poyyapakkam, Madhavan; Winkler, Anton; Theuer, Andre, Reheat burner injection system.
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Poyyapakkam, Madhavan; Benz, Urs; Theuer, Andre; Winkler, Anton; Ciani, Andrea, Reheat burner injection system with fuel lances.
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Hughes, Michael John; Johnson, Thomas Edward; Berry, Jonathan Dwight; York, William David, System and method having multi-tube fuel nozzle with differential flow.
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Boardman, Gregory Allen; Hughes, Michael John; McConnaughhay, Johnie Franklin, System having a combustor cap.
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Potnis, Shailesh Vijay; Joshi, Narendra Digamber, Turbine inlet air-cooling system and method.
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Tangirala, Venkat Eswarlu; Joshi, Narendra Digamber, Ultra compact combustor having reduced air flow turns.
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[미국특허] Air fuel mixer for gas turbine combustor having slots at downstream end of mixing duct 원문보기