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특허 상세정보

Passively driven acoustic jet controlling boundary layers

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F01D-025/04   
미국특허분류(USC) 415/119; 415/914; 415/115; 415/1731
출원번호 US-0257563 (1999-02-25)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 43  인용 특허 : 8
초록

Existing pressure oscillations created by axial or centrifugal fans in a diverging shroud are utilized to power a passive, acoustic jet, the nozzle of which directs high momentum flux gas particles essentially tangentially into the boundary layer of the flow in a diffuser, or a duct, the fluid particles in the resonant chamber of the passive acoustic jet being replenished with low momentum flux particles drawn from the fluid flow in a direction normal to the surface, thereby to provide a net time averaged flow of increased momentum flux particles to defe...

대표
청구항

1. A fluid flow system, comprising:a fluid flow path having a surface and a stream of fluid flowing within said path, said fluid flow having a boundary layer adjacent said surface, said fluid flow having oscillatory pressure fluctuations; a passive acoustic chamber disposed near said surface; and a fluid passage interconnecting said chamber with said fluid flow path at a small acute angle with respect to said surface, said chamber and said passage forming a resonant, passive acoustic jet of which said passage forms a nozzle, the resonant frequency of sai...

이 특허를 인용한 특허 피인용횟수: 43

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  12. Farstad, Jerry E.. Engine assembly, acoustical liner and associated method of fabrication. USP2011017870929.
  13. Winter, Michael. Fan nacelle flow control. USP2013098529188.
  14. Shah, Hemant S.; Hollingshead, John Stuart; Wang, John; Thawani, Prakash Tuljaram; Kosik, Richard Charles; Kumar, Mukesh. Fan shroud with built in noise reduction. USP2005056896095.
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  24. Ali, Amr; Qiu, Yuan J.. Multi-splice acoustic liner. USP2013128602156.
  25. Jain, Ashok K.; Winter, Michael. Nacelle assembly having inlet airfoil for a gas turbine engine. USP2013048408491.
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  30. Jain, Ashok K.. Nacelle flow assembly. USP2015049004399.
  31. Todorovic, Predrag. Noise-reduced aircraft engine and method for reducing noise emissions of an aircraft engine. USP2012078220586.
  32. Rice, Edward C.. Propulsive force vectoring. USP2018059976514.
  33. Gerlach, David W.; McCormick, Duane C.. Sound attenuating heat exchanger for an internal combustion engine. USP2013128596050.
  34. Rice, Edward C.; Sumner, Bradley S.. Splayed inlet guide vanes. USP20181110125622.
  35. Rice, Edward C.. System and method for a fluidic barrier on the low pressure side of a fan blade. USP2018039915149.
  36. Rice, Edward C.. System and method for creating a fluidic barrier from the leading edge of a fan blade. USP20190310233869.
  37. Tang, Punan; Jasso, Thomas P.; Chowdhury, Mohammed I.. System and method for noise suppression. USP2011027891464.
  38. Lovett, Jeffery A.; Philippona, Derk S.. Systems and methods involving reduced thermo-acoustic coupling of gas turbine engine augmentors. USP2017099759424.
  39. Baarck, Jenny N.; Krayenvenger, Daren; Proscia, William; Jones, Christopher D.. Turbine engine tailcone resonator. USP2009067552796.
  40. Jain, Ashok K.; Winter, Michael. Variable contour nacelle assembly for a gas turbine engine. USP2016019228534.
  41. Jain, Ashok K.; Winter, Michael. Variable contraction ratio nacelle assembly for a gas turbine engine. USP2014058727267.
  42. Jain, Ashok K.. Variable geometry nacelle assembly for a gas turbine engine. USP2012068205430.
  43. Jain, Ashok K.; Chaudhry, Zaffir A.. Variable shape inlet section for a nacelle assembly of a gas turbine engine. USP2013038402739.