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Translating lip aircraft cowling structure adapted for noise reduction

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64D-033/02   
미국특허분류(USC) 244/53B ; 244/53R ; 181/215 ; 181/220
출원번호 US-0343729 (1989-04-27)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 22  인용 특허 : 10
초록
▼

The present invention comprises a cowling structure for a gas turbine aircraft engine which allows the aerodynamic characteristics of the inlet passageway to the engine to be varied in accordance with flight conditions. This structure includes an annular lip portion positioned at the front edge of the cowling defining an aerodynamically sharp contour and which is mounted on a set of support struts constructed for allowing the lip portion to be translated forwardly and backwardly from the forward edge of the cowling. The structure further comprises a mech...

대표
청구항
▼

In a gas turbine engine for an aircraft having an air intake passageway defined by a cowling which functions for directing ambient air into said engine, a variable geometry inlet structure adapted for noise reduction, comprising: an annular lip positioned at the front edge of said cowling for defining an aerodynamically sharp contour along the front edge of said cowling; means for axially translating said lip forwardly from and backwardly to the front edge of said cowling including a set of circumferentially spaced struts for mounting said lip, said stru...

이 특허에 인용된 특허 (10)

  1. Krojer Hubert (Kippenhausen DT). Air intake with deflecting device against foreign objects impinging in the initial direction of air flow at engine nacel. USP1977094047911.
  2. Ball William H. (Mercer Island WA) Syberg Jan (Kent WA). Apparatus for re-energizing boundary layer air. USP1988064749151.
  3. Friedrich Thomas E. (7 Egerton Place London ; S.W.3 GBX). Arrangement for suppressing jet engine noise. USP1990064934481.
  4. Cowan Samuel Joseph (Seattle WA) Little John William (Bellevue WA). Fluid layer acoustic shield for turbofan jet propulsion engine. USP1977054023644.
  5. Shah Anil D. (Seattle WA). Integrated thermal anti-icing and environmental control system. USP1976093981466.
  6. Tracksdorf Peter (Grbenzell DEX). Jet engine nacelle. USP1989094865268.
  7. Jacobs Loyd D. (Bellevue WA) Shivashankara Belur N. (Bellevue WA). Mounting assembly for unducted prop engine and method. USP1990044917336.
  8. Harris Alfred W. (Bellevue WA). Noise reducing air inlet for gas turbine engines. USP1980124240250.
  9. Miller Brent A. (Olmsted Falls OH). Self stabilizing sonic inlet. USP1979054154256.
  10. Frantz John J. (Fairfield OH). Variable double lip quiet inlet. USP1979014132240.

이 특허를 인용한 특허 피인용횟수: 22

  1. McDonough, Michael Patrick; Brown, Keith Towers; Gilzean, Scott. Aircraft engine nacelle with translating inlet cowl. USP2012058181905.
  2. Megerian, Sevan; Clifton, Chandler. Compression ramp boundary layer removal. USP2015069046035.
  3. Morford, Stephen A.; Larkin, Michael J.. Gas turbine engine having slim-line nacelle. USP2014098844294.
  4. Morford, Stephen A.; Larkin, Michael J.. Gas turbine engine having slim-line nacelle. USP2013018353164.
  5. Morford, Stephen A.; Larkin, Michael J.. Gas turbine engine having slim-line nacelle. USP2014058726632.
  6. Winter, Michael; Jain, Ashok K.. Gas turbine engine system providing simulated boundary layer thickness increase. USP2012078209953.
  7. Todorovic, Predrag. Gas-turbine engine with telescope-type air inlet of the engine cowling (nacelle). USP2017089719421.
  8. Kubica Daniel J. ; Solheim John A.. Golf club head. USP200003D422043.
  9. Hall Edward J. ; Meade Joseph P.. Method for reducing turboprop noise. USP1999105961067.
  10. Jain, Ashok K.; Winter, Michael. Nacelle assembly having inlet airfoil for a gas turbine engine. USP2013048408491.
  11. Haas, Martin. Nacelle assembly having inlet bleed. USP2012068192147.
  12. Haas, Martin. Nacelle assembly with turbulators. USP2012058186942.
  13. Jain, Ashok K.. Nacelle flow assembly. USP2013128596573.
  14. Jain, Ashok K.. Nacelle flow assembly. USP2012108282037.
  15. Jain, Ashok K.. Nacelle flow assembly. USP2015049004399.
  16. Vauchel, Guy Bernard; Epherre-Iriart, Serge. Removable air intake structure for a turbofan engine nacelle. USP2014068740137.
  17. Gupta, Anurag; Graziosi, Paolo; Mani, Ramani. System and method for actively changing an effective flow-through area of an inlet region of an aircraft engine. USP2003126655632.
  18. Mouton, Herve Jean Albert; Vincent, Thomas Alain Christian. Turbojet nacelle having a removable air intake structure. USP2014128899255.
  19. Jain, Ashok K.; Winter, Michael. Variable contour nacelle assembly for a gas turbine engine. USP2016019228534.
  20. Jain, Ashok K.; Winter, Michael. Variable contraction ratio nacelle assembly for a gas turbine engine. USP2014058727267.
  21. Labrecque, Michel; Couture-Gagnon, Vincent; Ullyott, Richard. Variable geometry inlet system. USP20190310221764.
  22. Jain, Ashok K.; Chaudhry, Zaffir A.. Variable shape inlet section for a nacelle assembly of a gas turbine engine. USP2013038402739.

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