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Noise suppression refracting inlet for jet engines

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F01N-011/00   
미국특허분류(USC) 137/151 ; 181/214
출원번호 US-0644893 (1975-12-29)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 12  인용 특허 : 0
초록
▼

A noise-reducing jet engine air inlet duct contoured to control air flow such that sound waves (noise) propagating upstream from the engine toward the entryway of the air inlet duct are refracted to the duct wall and/or engine inlet centerbody is disclosed. The inlet duct wall and/or engine inlet centerbody are contoured to establish a cross-sectional duct region having substantial airflow velocity gradients in a direction transverse to the direction of the airflow. Starting at the inlet duct entryway, the contoured duct region includes a parallel or div...

대표
청구항
▼

In an air inlet duct suitable for directing airflow to the inlet of a jet engine wherein said air inlet duct includes an entrance opening and a flow passage extending from said entrance opening for directing said airflow to said jet engine inlet, the improvement comprising means for establishing a velocity gradient in said airflow relative to the direction substantially transverse to the direction of aid airflow, said means for establishing said velocity gradient being located along a predetermined portion of said flow passage at a position downstream of...

이 특허를 인용한 특허 피인용횟수: 12

  1. Kempton,Andrew J; Baker,Nicholas J; McAlpine,Alan; Astley,Jeremy. Acoustic liner for gas turbine engine. USP2006107124856.
  2. McConachie James M. ; Curtin Margaret M. ; Dougherty Robert P. ; Sangwin Michael L.. Biplanar scarfed nacelle inlet. USP1999065915403.
  3. Mosley, Christopher Alan; Smith, Angus Roy; Sheaf, Christopher Thomas John; Wells, John Richard. Gas turbine engine nacelle. USP2018029885285.
  4. Rice Edward J. ; Walker Bruce E. ; Hersh Alan S.. Hybrid mode-scattering/sound-absorbing segmented liner system and method. USP1999115979593.
  5. Labrecque, Michel; Couture-Gagnon, Vincent; Ullyott, Richard. Low noise aeroengine inlet system. USP2018059957889.
  6. Labrecque, Michel; Couture-Gagnon, Vincent; Ullyott, Richard. Low noise aeroengine inlet system. USP2018049951690.
  7. Labrecque, Michel; Couture-Gagnon, Vincent; Ullyott, Richard. Low noise aeroengine inlet system. USP20180810054050.
  8. Hatfield Gregory A. (Foster City CA) Lash Robert E. (Foster City CA). Noise attenuating smokeless surgical device. USP1987084683884.
  9. Rosen, Seth E.; Chrabascz, Eric; Richardson, Victoria S.. Ram air fan inlet housing. USP2014118887486.
  10. Whitmore, Ian. Structural element of an air vehicle air intake composed of an array of passages with a hexagonal cross section. USP2016119493244.
  11. Jones Anthony C. (San Diego CA) Weber Henry A. (San Diego CA). Sustainer propulsion system. USP1990074938021.
  12. Labrecque, Michel; Couture-Gagnon, Vincent; Ullyott, Richard. Variable geometry inlet system. USP20190310221764.

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