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특허 상세정보

Device to provide flow inversion in a turbofan exhaust tailpipe to achieve low jet noise

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F02K-003/02   
미국특허분류(USC) 60/262 ; 181/213 ; 181/220
출원번호 US-0763199 (1977-01-27)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 17  인용 특허 : 3

Jet noise generation occasioned from the gaseous streams in the coaxial streams of a turbofan engine when they as well as the ambient stream encounter is reduced by designing the engine so that the value of the true velocity of the outer stream is substantially higher than the value of the true velocity of the inner stream. It is contemplated that for a turbofan engine the fan stream and primary or engine core streams are inverted so that the higher velocity stream would be in the outer coaxial passage immediately upstream of the point where the streams ...


A fan-jet engine having a core engine portion including a turbine, and a fan portion, each portion defining coannular passages where the air from the fan exhaust in the outer coannular passage and the working medium in the core portion discharges from the turbine in the inner coannular passage, means downstream of said turbine for inverting said coannular passages so that the inner coannular stream exhausts from said engine as the outer coannular stream and the outer coannular stream exhausts from said engine in the inner coannular stream, said means inc...

이 특허를 인용한 특허 피인용횟수: 17

  1. Cicon Dennis E. (Manchester CT). Acoustic treated exhaust plug for turbine engine. USP1980104226297.
  2. Matta Ram K. (Loveland OH) Clapper William S. (West Chester OH). Apparatus for suppressing internally generated gas turbine engine low frequency noise. USP1981014244440.
  3. Batey J. Gary. Core flow expansion chamber device system for reduction of jet turbine engine noise. USP1998065758488.
  4. Johnson Joseph M. (Bothell WA) Thornock Russell L. (Seattle WA). Fixed geometry controlled entrainment ventilated convergent nozzle and method. USP1986024567960.
  5. Horgan John J. (Wethersfield CT). Gas turbine outlet arrangement. USP1987094696159.
  6. Schlinker,Robert; Narayanan,Satish; Lord,Wesley K.; Kohlenberg,Gregory A.; Reba,Ramons; Simonich,John; Soteriou,Marios C.; Maeder,Thierry. Jet exhaust noise reduction system and method. USP2006107114323.
  7. Gutmark,Ephraim Jeff; Callender,Bryan W.; Martens,Steven. Method and apparatus for operating gas turbine engines. USP2008087412832.
  8. Gutmark,Ephraim Jeff; Martens,Steven. Methods and apparatus for operating gas turbine engines. USP2007077246481.
  9. Streib Richard A. (Ellington CT). Muffler plug for gas turbine power plant. USP1981034258822.
  10. Bhat Waman V. (Redmond WA) Wright Charles P. (Seattle WA). Noise suppressing turbofan nozzles and method. USP1981094288984.
  11. Dionne, Luc. Passive cooling system for auxiliary power unit installation. USP2017059644538.
  12. Farquhar Bannister W. (Bellevue WA) Sokhey Jagdish S. (Renton WA). Primary-secondary ventilated flow mixer nozzle for high bypass turbo fan jet propulsion system. USP1989044819425.
  13. Sokhey, Jagdish S.; Pierluissi, Anthony F.. Reduced noise gas turbine engine system and supersonic exhaust nozzle system using elector to entrain ambient air. USP2017079714608.
  14. Sheoran,Yogendra Y.; Payne,Roger I.. System and method for dumping surge flow into eductor primary nozzle for free turbine. USP2006127152410.
  15. Sheoran, Yogendra Y.; Brown, Daniel V.; Edmonds, David H.. Tortuous path quiet exhaust eductor system. USP2003096615576.
  16. Prior Barry (San Diego CA). Turbo fan engine mixer. USP1981104292803.
  17. Lillibridge Robert W. ; McGuire Kenneth R. ; Phillips Edward J. ; Matthews Eugene James. Turbofan engine with reduced noise. USP1999085943856.