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특허 상세정보

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내보내기 페이스북 공유 카카오톡 공유

Segmented mixing device having chevrons for exhaust noise reduction in jet engines

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F02K-001/00   
미국특허분류(USC) 060/204; 060/770; 239/265.17; 181/206
출원번호 US-0822962 (2001-03-30)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Gardner, Conrad O.
인용정보 피인용 횟수 : 26  인용 특허 : 17
초록
▼

Disclosed is a means for reducing jet engine exhaust noise wherein mixing is enhanced between adjacent exhaust flows and between exhaust flow and free-stream flow. The device does so with a very small degradation in aircraft performance. The device is a segmented, triangular or trapezoidal shaped, curved extension to a nozzle's sleeve that results in a serrated trailing edge. The nozzle extensions enhance the natural free mixing of the jet's exhaust flows and therefore reduce the acoustic energy associated with the velocity differences between the stream...

대표
청구항

1. A method for reducing noise radiated from a jet engine exhaust flow comprising the steps of: adding an extension to a gas flow nozzle; and configuring said extension to enhance low frequency noise while inhibiting an increase in high frequency noise.

이 특허에 인용된 특허 (17)

  1. Rudolph Peter K. C.. Aircraft turbofan engine mixing apparatus. USP1998065771681.
  2. John F. Brausch ; Bangalore A. Janardan ; John W. Barter, IV ; Gregory E. Hoff. Chevron exhaust nozzle for a gas turbine engine. USP2002036360528.
  3. Detalle Bernard (L\Hay-les-Roses FRX). Device for imparting a movement of rotation to a craft when it is launched. USP1980034194706.
  4. Hebert Leonard J. ; Piro Jerry ; Su Michael W. ; Balzer Ronald L. ; Sangwin Michael L. ; Lewis Jeff P. ; Moody Robert E.. Engine flow control device. USP1999055906097.
  5. Kirker, Timothy J.. Exhaust flow mixers and nozzles. USP1985104543784.
  6. Mavrocostas George (Lanarca CYX). Exhaust mixer for turbofan aeroengine. USP1986034576002.
  7. Larson Richard S. (Rocky Hill CT) Packman Allan B. (West Hartford CT). Gas turbine noise suppressor. USP1981084284170.
  8. Seiner John M. ; Gilinsky Mikhail M.. Jet nozzle having centerbody for enhanced exit area mixing. USP1999075924632.
  9. Eiler Donald C. (South Windsor CT). Lobe mixer for gas turbine engine. USP1983084401269.
  10. Gilbertson Frederick L. (Toronto CAX) Garland Douglas B. (Toronto CAX) Whittley Donald C. (Toronto CAX). Nozzle structure with notches. USP1982014311291.
  11. 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.
  12. Mathews Douglas C. ; Low John K. C.. Tabbed nozzle for jet noise suppression. USP2001116314721.
  13. Lillibridge Robert W. ; McGuire Kenneth R. ; Phillips Edward J. ; Matthews Eugene James. Turbofan engine with reduced noise. USP1998015706651.
  14. Dusa Donald J. (Cincinnati OH) Kuchar Andrew P. (West Chester OH) Faust Guy K. (West Chester OH). Turbofan mixed flow exhaust system. USP1986064592201.
  15. Seiner John M. ; Gilinsky Mikhail M.. Undulated nozzle for enhanced exit area mixing. USP2000076082635.
  16. Birch Stanley F. (Bellevue Federal Way WA) Lawler John A. (Federal Way WA) Paynter Gerald C. (Seattle WA). Vortex generators for internal mixing in a turbofan engine. USP1981114298089.
  17. Birch Stanley F. (Bellevue WA) Lawler John A. (Seattle WA) Paynter Gerald C. (Seattle WA). Vortex generators for internal mixing in a turbofan engine. USP1979114175640.

이 특허를 인용한 특허 피인용횟수: 26

  1. Viswanathan,Krishnamurthy. Apparatus and method for reduction jet noise from single jets. USP2008057377108.
  2. Viswanathan, Krishnamurthy. Apparatus and method for reduction of jet noise from single jets. USP2010087784285.
  3. Viswanathan, Krishnamurthy. Apparatus and method for reduction of jet noise from turbofan engines having separate bypass and core flaws. USP2010117836700.
  4. Viswanathan,Krishnamurthy. Apparatus and method for reduction of jet noise from turbofan engines having separate bypass and core flows. USP2008057377109.
  5. Ireland, Peter. Application of elastomeric vortex generators. USP2014108870124.
  6. Anderson,Morris G.; Gerrard,John C.; Ruiz,Ron G.; Mitchell,Robert D.. Compact mixer with trimmable open centerbody. USP2009037506501.
  7. Bodard, Guillaume; Vuillemin, Alexandre Alfred Gaston. Device for reducing the noise emitted by the jet of an aircraft propulsion engine. USP2016089422887.
  8. Gutmark, Ephraim Jeff; Martens, Steven (nmn). Duplex tab exhaust nozzle. USP2012018087250.
  9. Huzzard Cunningham, Mark. Gas turbine engine exhaust mixer including circumferentially spaced-apart radial rows of tabs extending downstream on the radial walls, crests and troughs. USP2014018635875.
  10. Joshi, Ninad; Girard, Gaetan. Gas turbine exhaust having reduced jet noise. USP2016089416752.
  11. Eakins, Mark E.; Wojciechowski, Paul M.. High-speed aircraft and methods for their manufacture. USP2010017644888.
  12. Anderson, Morris G.; Jan, David K.; Zurmehly, George E.; Halfmann, Steve H.; Zollars, Christopher E.. Integrated support and mixer for turbo machinery. USP2011027882696.
  13. Suchezky, Mark E.; Simpkins, Lisa M.. Jet engine exhaust nozzle and associated system and method of use. USP2014068746613.
  14. Mengle, Vinod G.. Jet engine nozzle exit configurations and associated systems and methods. USP2011067966824.
  15. Mengle, Vinod G.. Jet engine nozzle exit configurations and associated systems and methods. USP2013088511090.
  16. Mengle, Vinod G.; Thomas, Russell H.. Jet engine nozzle exit configurations, including projections oriented relative to pylons, and associated systems and methods. USP2012048157207.
  17. Rose, Marco; Spieweg, Rene. Nozzle with guiding devices. USP2017039605621.
  18. Rose, Marco; Spieweg, Rene. Nozzle with guiding devices. USP2016039279387.
  19. Dun, Roy. Scarf nozzle for a jet engine and method of using the same. USP2005116969028.
  20. Blodgett,Keith Edward James; Early,Kevin Sean; Martens,Steven; Bailey,William Andrew; Price,Kenneth Daniel. Sinuous chevron exhaust nozzle. USP2007127305817.
  21. Birch, Stanley F.; Secundov, Alexander N.; Lyubimov, Dmitriy A.; Khritov, Konstantin M.; Maslov, Vladimir P.; Mironov, Aleksey K.. Systems and methods for passively directing aircraft engine nozzle flows. USP2011017870722.
  22. Birch, Stanley F.; Secundov, Alexander N.; Lyubimov, Dmitriy A.; Khritov, Konstantin M.; Maslov, Vladimir P.; Mironov, Aleksey K.. Systems and methods for passively directing aircraft engine nozzle flows. USP2012058166768.
  23. Alkislar, Mehmet B.; Butler, George W.; Reed, David H.. Systems and methods for reducing noise from jet engine exhaust. USP2011067966826.
  24. Papamoschou, Dimitri. Turbofan engine noise suppression using fan flow deflector. USP2015048997454.
  25. Al-Ansary, Hany Abdulrahman M.. Vortex-generating nozzle-end ring. USP2014088807458.
  26. Thomas, Russell H.; Kinzie, Kevin W.. Wet active chevron nozzle for controllable jet noise reduction. USP2011098015819.

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