[특허]Diffuser with enhanced surge margin

Diffuser with enhanced surge margin 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B23K-005/18
출원번호	US-0541099 (2012-07-03)
등록번호	US-8556573 (2013-10-15)
발명자 / 주소	LeBlanc, Andre
출원인 / 주소	Pratt & Whitney Cananda Corp.
대리인 / 주소	Norton Rose Fulbright Canada LLP
인용정보	피인용 횟수 : 0 인용 특허 : 42

초록 ▼

A diffuser for a centrifugal impeller assembly of a gas turbine engine includes a diffuser case having a plurality of vanes extending therein defining a plurality of circumferentially distributed angled passages in communication with an inlet space. Each vane includes a bleed port defined in a suction surface thereof, in proximity of the leading edge. The diffuser case includes a passive fluid communication defined at least partially through each one of the vanes between each bleed port and the inlet space upstream of the leading edge, such that air bled through the bleed ports is recirculated upstream of the leading edges to the inlet space to increase a surge margin of the diffuser.

대표청구항 ▼

1. A diffuser for a centrifugal compressor assembly of a gas turbine engine including an impeller, the diffuser comprising: a diffuser case defining a circumferentially extending inlet space surrounding an exit of the impeller, a plurality of vanes defining therebetween a plurality of circumferentially distributed angled diffuser passages for receiving gas flow from the impeller, the inlet space being disposed between the diffuser passages and the impeller, each vane including a respective leading edge adjacent to or located in the inlet space, and each vane having a corresponding bleed port defined in a suction surface thereof within each of the diffuser passages, each said bleed port being disposed downstream of a leading edge of the vane defining the diffuser passage and upstream of a throat of the diffuser passage, the diffuser case including a passive fluid communication defined at least partially through each vane between the corresponding bleed port and the inlet space upstream of the leading edges, such that air bled from each passage downstream of the leading edges through the bleed ports is passively returned back into the gas flow at a point upstream of the bleed port and of the leading edge of the vane by reintroducing the bleed air into the inlet space for recirculation through the diffuser such as to increase a surge margin of the diffuser. 2. The diffuser as defined in claim 1, wherein each passage extends through the diffuser case tangentially to a periphery of the impeller assembly or to a circle concentric therewith. 3. The diffuser as defined in claim 1, wherein the diffuser includes an annular manifold in fluid communication with the inlet space upstream of the leading edge of each vane, and each vane includes a conduit defined therethrough extending between the at least one bleed port and the manifold. 4. The diffuser as defined in claim 1, wherein the leading edges extend in the inlet space to define a semi-vaneless space, each bleed port being defined in the semi-vaneless space.

이 특허에 인용된 특허 (42)

Mowill Jan (Rugdeveien 7 Oslo 3 NOX), Bleedoff of gas from diffusers in fluid flow machines.
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Hayes William J. (Shelby MI), Boron diffusion coating process.
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J. Albert Sue ; Zhigang Fang ; Alysia Canson White, Boronized wear-resistant materials and methods thereof.
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Finkenbinder David B. ; Marsden Jeffrey D., Bypass motor/fan assembly having separate working air passages.
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Swarden Michael C. (Cambridge MA) Magge Shankar S. (Manchester CT) Jansen Willem (Weston MA) Carter Anthony F. (Newton Highlands MA), Centrifugal compressor.
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Bryans ; Alexander Connor ; Weinstein ; Barry ; Brookes ; Neil Roger ; Vdoviak ; John William, Centrifugal compressor advanced dump diffuser.
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Chan Chi F. (Mesa AZ) Pringnitz Steven J. (Gilbert AZ), Centrifugal compressor hub containment assembly.
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Chan Chi F. (Mesa AZ) Pringnitz Steven J. (Gilbert AZ), Centrifugal compressor hub containment assembly.
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Penny Robert Noel (Solihull EN), Centrifugal compressor or centripetal turbine.
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Perrone ; George L. ; Boorman ; Robert W. ; Holbrook ; Michael R. ; Zan elli ; Eugene A., Centrifugal compressor with improved range.
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Brodersen Snke (Schriesheim DEX) Hergt Peter (Ludwigshafen DEX) Metzinger Wolfgang (Pegnitz DEX) Krieger Paul (Mutterstadt DEX), Centrifugal pump impeller.
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Zaehring Gerhard (Worthsee DEX) Prodehl Christian (Martinsried DEX), Device for controlling the throat areas between the diffusor guide vanes of a centrifugal compressor of a gas turbine en.
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Nguyen Duc Jean-Michel,FRX ; Geai Philippe,FRX ; Duchemin Jean-Marie,FRX, Device for transferring fluid between two successive stages of a multistage centrifugal turbomachine.
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Bryans Alexander C. (Reading MA), Diffuser for a centrifugal compressor.
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Meng, Sen Yih, Diffuser having a variable blade height.
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LeBlanc, Andre, Diffuser with enhanced surge margin.
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Roberts, Douglas Allan; LeBlanc, Andre Denis; Kacker, Suresh Chandra; Townsend, Peter Ralph; Sasu, Ioan, Discrete passage diffuser.
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Richards Stephen J. (Coventry GB2) Simmonds Gabriel (Birmingham GB2) Hatfield John E. (Warwickshire GB2), Gas turbine engine and a diffuser therefor.
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Cole Martin T. (7 Loxwood Avenue Keysborough ; Victoria 3173 AUX), Gaseous fluid aspirator or pump especially for smoke detection systems.
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Lehe Jean-Robert (Vernon FRX) Beaurain Andr (Chambly FRX) Bosson Ren (Vernon FRX) Tiret Etienne (La Chapelle Reanville FRX), High performance centrifugal pump having an open-faced impeller.
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Ebden Clive ; Gomuc Reha, Impeller containment system.
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Chamberlain Stephen S. (Dollard des Ormeaux CAX), Impeller shroud.
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Libertini Zoltan L. (Stamford CT), Impeller shroud of a centrifugal compressor.
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Ioan Sasu CA; Andre LeBlanc CA; Michel Bellerose CA, Integrated duct diffuser.
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Toth ; Jr. Michael (Crosby TX) Jackson ; Jr. Jean Andre (Houston TX), Means for preventing an engine turbocharger from being damaged by foreign objects.
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Paderov, Anatol y Nikolaevich; Ve Xler, Jouri Genrihovich, Method for deposition of wear-resistant coatings and for increasing the lifespan of parts.
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Naik Subhash K. (Milford CT), Method for imparting erosion-resistance to metallic substrates.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Diffuser with enhanced surge margin 원문보기

초록 ▼

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Diffuser with enhanced surge margin 원문보기

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연구과제 타임라인

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이 특허에 인용된 특허 (42)

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