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특허 상세정보

Apparatus and method for reduction of jet noise from single jets

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F02K-001/00   
미국특허분류(USC) 060/770; 060/226.1; 060/262
출원번호 UP-0013045 (2008-01-11)
등록번호 US-7784285 (2010-09-20)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Harness, Dickey & Pierce, P.L.C.
인용정보 피인용 횟수 : 1  인용 특허 : 26
초록

An exhaust flow nozzle for use with a jet engine. The exhaust flow nozzle includes a beveled downstream edge portion that helps to direct noise generated by the jet engine upwardly away from a ground surface during takeoff and landing operations. One specific embodiment makes use of a linearly moveable flow altering component that is positioned outside the final flow nozzle. When the flow altering component is in its retracted position it has no effect on the exhaust flow leaving the flow nozzle. Alternative embodiments involve the use of varying edge sh...

대표
청구항

What is claimed is: 1. A mixed flow exhaust nozzle for a jet engine, comprising: a tubular final nozzle having a downstream edge portion through which exhaust flow from said jet engine exits said tubular final nozzle; a primary nozzle disposed within the tubular final nozzle; said downstream edge of said tubular final nozzle forming a non-linear edge; and wherein the non-linear edge comprises a beveled portion over a portion of said downstream edge, when viewing said downstream edge from a side view. 2. The mixed flow exhaust nozzle of claim 1, where...

이 특허에 인용된 특허 (26)

  1. Tse, Man-Chun. Aero-engine exhaust jet noise reduction assembly. USP2003116640537.
  2. Whurr John (Derby GB2). Aircraft compound cycle propulsion engine. USP1997125692372.
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  4. Dorris ; III John ; Smith David Michael ; Parekh David Espineli ; Kibens Valdis. Apparatus and methods for active flow control of a nozzle exhaust plume. USP2001106308898.
  5. John F. Brausch ; Bangalore A. Janardan ; John W. Barter, IV ; Gregory E. Hoff. Chevron exhaust nozzle for a gas turbine engine. USP2002036360528.
  6. Hebert, Leonard J.. Convergent/divergent segmented exhaust nozzle. USP2003126658839.
  7. Bonnet,Jean Paul; Delville,Joel; Collin,Erwan; Tensi,Jean; Moreau,Eric; Touchard,Gerard. Device for controlling propulsive jet mixing for aircraft jet engines. USP2007027174718.
  8. Newton Arnold C,GBX. Ducted fan gas turbine engine with variable area fan duct nozzle. USP2000066070407.
  9. Mavrocostas George (Lanarca CYX). Exhaust mixer for turbofan aeroengine. USP1986034576002.
  10. Richard A Pinker GB. Exhaust nozzle for by-pass gas turbine engines. USP2002076415598.
  11. Birch, Nigel T; Webster, John R. Gas turbine engine exhaust nozzle having a noise attenuation device driven by shape memory material actuators. USP2004116813877.
  12. Birch,Nigel T; Webster,John R. Gas turbine engine exhaust nozzle having a noise attenuation device driven by shape memory material actuators. USP2006027000378.
  13. Steven H. Zysman ; Wesley K. Lord ; Gregory A. Kohlenberg. Gas turbine engine jet noise suppressor. USP2002126487848.
  14. Seiner John M. ; Gilinsky Mikhail M.. Jet nozzle having centerbody for enhanced exit area mixing. USP1999075924632.
  15. Bagley Charles S. (1314 Ohio Ave. Alamogordo NM 88310). Jet propulsion engine and method. USP1989044817379.
  16. Bhat Waman V. (Redmond WA) Wright Charles P. (Seattle WA). Noise suppressing turbofan nozzles and method. USP1981094288984.
  17. Vuillamy Didier (Quincampoix FRX) Baudart Pierre-Andr (Vernon FRX) Tiret Etienne (La Chapelle Reanville FRX) Beaurain Andr (Chambly FRX). Rocket engine nozzle having a notched diverging portion. USP1995095450720.
  18. Dun, Roy. Scarf nozzle for a jet engine and method of using the same. USP2005116969028.
  19. Balzer, Ronald L.. Segmented mixing device having chevrons for exhaust noise reduction in jet engines. USP2003096612106.
  20. Reba, Ramons Andris; Wake, Brian Ernest; Narayanan, Satish; Maeder, Thierry. Serrated nozzle trailing edge for exhaust noise suppression. USP2009067543452.
  21. Martens, Steven. Shelf truncated chevron exhaust nozzle for reduction of exhaust noise and infrared (IR) signature. USP2003036532729.
  22. Mathews Douglas C. ; Low John K. C.. Tabbed nozzle for jet noise suppression. USP2001116314721.
  23. Negulescu Dimitrie,DEX ; Haarmeyer Jorg,DEX. Turbofan aircraft engine. USP2001076260352.
  24. Seiner John M. ; Gilinsky Mikhail M.. Undulated nozzle for enhanced exit area mixing. USP2000076082635.
  25. Rey Nancy M. ; Miller Robin M. ; Tillman Thomas G. ; Rukus Robert M. ; Kettle John L. ; Dunphy James R. ; Chaudhry Zaffir A. ; Pearson David D. ; Dreitlein Kenneth C. ; Loffredo Constantino V. ; Wyno. Variable area nozzle for gas turbine engines driven by shape memory alloy actuators. USP2001116318070.
  26. Rey, Nancy M.; Miller, Robin Mihekun; Tillman, Thomas G.; Rukus, Robert M.; Kettle, John L.. Variable area nozzle for gas turbine engines driven by shape memory alloy actuators. USP2004056735936.