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특허 상세정보

Device and method for reducing aircraft noise

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64C-021/10   
미국특허분류(USC) 244/001N; 244/199; 244/130
출원번호 US-0533282 (2000-03-22)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Kurt G. Hammerle
인용정보 피인용 횟수 : 7  인용 특허 : 20

A noise abatement device that is positioned adjacent to a body. The noise abatement device generally includes tabs or cavities which thicken the shear layer created by fluid flow over, around, or near the body, by creating horseshoe-shaped vortices; this thickening of the shear layer reduces the strength of fluctuations in the flow which produce noise.


1. A method of abating noise caused by a shear layer, the shear layer created by a fluid flow near an end of a body having a streamwise chord defined as being parallel to the fluid flow wherein the end of the body extends along a direction that is substantially parallel to the streamwise chord, the body further having a lift surface, said method comprising the step of:thickening the shear layer adjacent and along the end of the body by creating cross-stream mixing of the shear layer at positions on the lift surface along the end of the body.

이 특허에 인용된 특허 (20)

  1. Wang Sui-Mu (c/o Hung Hsing Patent Service Center ; P.O. Box 55-1670 Taipei (10477) TWX). Air fan with lightly-constructed reinforcing fan blades. USP1993095244349.
  2. Chuang Kuang S. ; Ho Yin-Hsiang ; Opdycke Steven R.. Aircraft cabin outflow valve including aft door modified for noise suppression. USP2000096116541.
  3. Nowak Dieter K.. Aircraft wing flaps. USP1998065772155.
  4. Fujinaka Hiroyasu,JPX. Blower. USP2001016179562.
  5. Cox Ronald A. (Norman OK). Concealable flap-actuated vortex generator. USP1993105253828.
  6. Burnham Robert W. (Seattle WA). Directional control device for aircraft. USP1984084466586.
  7. Patel ; Jay. Fan with noise reduction. USP1978054089618.
  8. Spillman John J. (Bedford GB2). Fluid stream deflecting members for aircraft bodies or the like. USP1981064272043.
  9. Ng Wing-Fai ; Leitch Thomas A. ; Saunders Christopher A.. Method and apparatus for reducing high-cycle fatigue and suppressing noise in rotating machinery. USP2000026027305.
  10. Powell Ronald L. (Hants GB3). Noise reduction method. USP1991125074376.
  11. Schneider Alfred (Zurich CHX) Tschudi Hans R. (Monchaltdorf CHX). Process for constructing a structural element that absorbs airborne sound. USP1988074755416.
  12. Kondo Fumio (Nagoya JPX) Taniguchi Masami (Nagoya JPX) Hayashi Masateru (Aichi-ken JPX) Ito Akihiro (Aichi-ken JPX). Propeller fan. USP1997025603607.
  13. Loth John L. (P.O. Box 4094 Morgantown WV 26505). Retractable rounded trailing edge for circulation control wing. USP1986074600172.
  14. Shimizu Toshio,JPX. Rotor blade for rotary-wing aircraft. USP2001016168383.
  15. Gilbert Raymond D. (6501 Inwood Dr. Springfield VA 22150). Segmented spoilers. USP1996105564656.
  16. Mangalam Sivaramakrishman M.. Self-actuated flow control system. USP2000096123296.
  17. Vijgen Paul M. H. W. (Hampton VA) Howard Floyd G. (Hampton VA) Bushnell Dennis M. (Wicomico VA) Holmes Bruce J. (Newport News VA). Serrated trailing edges for improving lift and drag characteristics of lifting surfaces. USP1992025088665.
  18. Russell ; Jr. William F. (Westport CT) Roncz John (Elkhart IN). Spoiler system for ground effect vehicles. USP1997125697468.
  19. Wenstadt Thomas D. (Oshkosh WI) Chmielewski Cary J. (North Fond du Lac WI). Trim control. USP1982034318699.
  20. Dassen Antonius G. M. (Vollenhove NLX) Hagg Franklin (Alkmaar NLX). Wind turbine. USP1996075533865.