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특허 상세정보

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

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F02F-001/38   
미국특허분류(USC) 060/204; 060/262; 060/770; 279/265.17; 181/206
출원번호 US-0351649 (2003-01-23)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Gardner Conrad O.
인용정보 피인용 횟수 : 11  인용 특허 : 7
초록

Disclosed is a segmented mixing device 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 ...

대표
청구항

1. A segmented mixing device for jet engines comprising a segmented, substantially triangular or trapezoidal shaped, curved extension of a nozzle sleeve wherein a plan view of said nozzle extension comprises a sinusoidal or “saw toothed” wave shape, said nozzle extension having a semi-round valley radius and a semi-round tip radius, said semi-round root radius larger than said semi-round tip radius. 2. A segmented nozzle extension for a jet engine wherein a plan view of said nozzle extension comprises a sinusoidal or “saw toothed...

이 특허를 인용한 특허 피인용횟수: 11

  1. 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.
  2. Mengle, Vinod G.. Jet engine nozzle exit configurations and associated systems and methods. USP2011067966824.
  3. Mengle, Vinod G.. Jet engine nozzle exit configurations and associated systems and methods. USP2013088511090.
  4. Mengle, Vinod G.; Thomas, Russell H.. Jet engine nozzle exit configurations, including projections oriented relative to pylons, and associated systems and methods. USP2012048157207.
  5. Rose, Marco; Spieweg, Rene. Nozzle with guiding elements. USP2012118307659.
  6. Balzer,Ronald L.. Segmented mixing device for jet engines and aircraft. USP2006067065957.
  7. Blodgett,Keith Edward James; Early,Kevin Sean; Martens,Steven; Bailey,William Andrew; Price,Kenneth Daniel. Sinuous chevron exhaust nozzle. USP2007127305817.
  8. 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.
  9. 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.
  10. Alkislar, Mehmet B.; Butler, George W.; Reed, David H.. Systems and methods for reducing noise from jet engine exhaust. USP2011067966826.
  11. Durocher, Eric; Lefebvre, Guy. Turbine exhaust case mixer of gas turbine with variable thickness. USP20190110190536.