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특허 상세정보

Vortex generators for internal mixing in a turbofan engine

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) E04B-001/99    G10K-011/04   
미국특허분류(USC) 181/213 ; 60/262 ; 60/317 ; 181/220
출원번호 US-0754046 (1976-12-23)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 42  인용 특허 : 1

Method and apparatus for reducing jet noise in a turbofan engine by causing internal mixing of fan and primary air to reduce the maximum velocity of gases at the nozzle exit plane by creating a particular type of vortex flow at a distance of at least one nozzle diameter forward of the nozzle exit plane. In one preferred embodiment for a JT8D engine an array of eight roll-top vortex generators are provided on each side of the splitter wall between fan and primary flows, and a portion of the fan air may be introduced into the central portion or core of the...


In a turbofan engine having an annular fan fluid flow exhaust passageway located between an outer engine cowling and a splitter wall structure, and an annular primary fluid flow exhaust passageway located inside of said splitter wall structure, apparatus for internal mixing of fan exhaust with primary exhaust forward of the nozzle exit plane of said engine comprising: a vortex generator attached to said splitter wall structure at least one nozzle diameter forward of said nozzle exit plane and extending radially into one of said annular passageways a dist...

이 특허를 인용한 특허 피인용횟수: 42

  1. Rudolph Peter K. C.. Aircraft chute ejector nozzle. USP1999065908159.
  2. Lidstone Gary L. ; Sandquist David L. ; Clark Larry T. ; Szupkay Imre A.. Aircraft engine ejector nozzle. USP1998075779150.
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  10. Rago,Giuseppe. Combined exhaust duct and mixer for a gas turbine engine. USP2006057043898.
  11. Anderson,Morris G.; Gerrard,John C.; Ruiz,Ron G.; Mitchell,Robert D.. Compact mixer with trimmable open centerbody. USP2009037506501.
  12. Hamid Sarv ; Jeffrey A. LaRose ; Albert D. LaRue ; Peter W. Waanders. Compound burner vane. USP2002056386863.
  13. Gutmark, Ephraim Jeff; Martens, Steven (nmn). Duplex tab exhaust nozzle. USP2012018087250.
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  16. Kirker, Timothy J.. Exhaust flow mixers and nozzles. USP1985104543784.
  17. Mavrocostas George (Lanarca CYX). Exhaust mixer for turbofan aeroengine. USP1986034576002.
  18. Rodgers Leonard J. (Spondon GB2). Exhaust mixer for turbofan aeroengine. USP1984124487017.
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  21. Graziosi, Paolo; Kirtley, Kevin; Mani, Ramani. Fluidic chevrons and configurable thermal shield for jet noise reduction. USP2009097581692.
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  23. Khakhar, Satish Christoph. Gas turbine engine with fluid mixing arrangement. USP2013118578700.
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  25. Berman Charles H.. Jet engine noise suppressor assembly. USP1999095947412.
  26. Rocklin, Mark; Karvountzi, Georgia C.; Hummel, Daniel S.. Method and apparatus for aircraft anti-icing. USP2011118061657.
  27. Blackmore Walter L. (Tempe AZ). Method and apparatus for selectively varying an effective fluid flow area of a jet engine exhaust nozzle. USP1991085038559.
  28. Radhakrishna Chilukuri. Passive control of hot air injection for swirling rotational type anti-icing system. USP2002036354538.
  29. John Helmut (Munich DEX) Herrmann Otfrid (Hohenthann DEX). Propulsion system for hypersonic flight. USP1990044919364.
  30. May Daryl N. ; Chapkis Robert L.. Rotating machinery noise control device. USP1998115833433.
  31. Balzer, Ronald L.. Segmented mixing device having chevrons for exhaust noise reduction in jet engines. USP2003096612106.
  32. Lidstone Gary L. ; Clark Larry T. ; Szupkay Imre A. ; Sandquist David L.. Stowable mixer ejection nozzle. USP1999085941065.
  33. Janardan, Bangalore Ananthamurthy; Brausch, John Francis. Stub airfoil exhaust nozzle. USP2003016502383.
  34. Quackenbush, Todd R.; McKillip, Jr., Robert M.; Danilov, Pavel V.. Supersonic engine inlet diffuser with deployable vortex generators. USP2016089429071.
  35. Van Ness, II, Daniel K.; Tews, Brian E.; Rodriguez, Christian O.. System and method to improve the exhaust pressure across a RAM air turbine through secondary flow mixing. USP2014088794902.
  36. Alhatim, Omair M.. System of support thrust from wasted exhaust. USP2018019879636.
  37. Sokhey, Jagdish; Kornegay, Brian. Techniques to reduce infrared detection of a gas turbine engine. USP2014078776527.
  38. Smith, Jeffrey P.. Thermal diffuser. USP2013068468811.
  39. Negulescu Dimitrie,DEX ; Haarmeyer Jorg,DEX. Turbofan aircraft engine. USP2001076260352.
  40. Goutines,Marius; Julliard,Jacques Michel Albert; Loheac,Pierre; Miroudot,Fr��d��ric Raymond Jean; Nogues,Jean Michel; Thomas,St��phane. Turbomachine nozzle cover for reducing jet noise. USP2008077392651.
  41. Banks Ivor (Georgetown CAX) Heikurinen Kari J. (Oakville CAX) Sanderson John J. (Oakville CAX) Wilford Donald F. (Oakville CAX). Variable flow radial compressor inlet flow fences. USP1989074844695.
  42. Gutmark Ephraim J. ; Guillot Stephen A.. Vortical lift control over a highly swept wing. USP2000106138955.