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특허 상세정보

Airfoil noise control

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64C-021/02    B64C-009/14    B64C-009/22   
미국특허분류(USC) 244/1N ; 244/204 ; 244/210
출원번호 US-0278439 (1994-07-21)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 14  인용 특허 : 0
초록

Acoustic noise resulting from the interaction of a periodic pressure and velocity fluctuation induced by a periodically passing blade wake interacting with a downstream airfoil (10)is attenuated by locating an antisymmetric pressure wave generator (30) adjacent the leading edge (18) of the vane (10).

대표
청구항

In an airfoil having a pressure surface, a suction surface, a leading edge and a chordal dimension, and wherein said airfoil is subject to a flow of fluid over said surfaces, said fluid flow defining a regularly fluctuating pressure and flow field, and wherein the interaction of said airfoil and said fluid flow results in the generation of acoustic noise having a characteristic frequency and wavelength, the improvement comprising wherein said airfoil includes means disposed adjacent the leading edge of said airfoil, for generating an antisymmetric period...

이 특허를 인용한 특허 피인용횟수: 14

  1. Trichês, Jr., Mário; Valle do Carmo, Micael Gianini; Caldeira da Silva, Bruno Arantes; Franca Barboza, Marcus Vinicius; Losada Gouveia, Vinicius. Aircraft provided with aerodynamic seal for reduction of noise generated by aircraft control surfaces. USP2014028657236.
  2. Reba, Ramons A.; Morin, Bruce L.; Morford, Stephen A.; Lord, Wesley K.. Airfoil acoustic impedance control. USP2009107607287.
  3. Liu, Zheji; Kuzdzal, Mark Joseph. Fluid-carrying conduit and method with noise attenuation. USP2011077984787.
  4. Gilson, Jonathan; Cicon, Dennis; Atassi, Oliver V.. Gas turbine engine with noise attenuating variable area fan nozzle. USP2017089745918.
  5. Gilson, Jonathan; Cicon, Dennis; Atassi, Oliver V.. Gas turbine engine with noise attenuating variable area fan nozzle. USP2015038973364.
  6. Platzer Maximilian F.. Integrated propulsion/lift/control system for aircraft and ship applications. USP1999115975462.
  7. Ho Patrick Y. ; Gliebe Philip R.. Low noise permeable airfoil. USP2000106139259.
  8. Cueman, Michael Kent; Saddoughi, Seyed Gholamali. Method and system for flow control with arrays of dual bimorph synthetic jet fluidic actuators. USP2012038136767.
  9. Borchers, Ingo; Drobietz, Roger; Lange, Thomas. Method for reducing the noise of turbo engines. USP2010077758296.
  10. Liu, Zheji. Multi-degree of freedom resonator array. USP2015028955643.
  11. Hassan, Ahmed A.; Straub, Friedrich K.; Domzalski, David B.. Oscillating air jets for implementing blade variable twist, enhancing engine and blade efficiency, and reducing drag, vibration, download and ir signature. USP2003046543719.
  12. Ali, Amr. Propfan assembly. USP2013048425191.
  13. Praisner, Thomas J.. Separation resistant aerodynamic article. USP2011098016567.
  14. Schwark, Jr., Fred W.; Atassi, Oliver V.; Owen, William D.. Variable area fan nozzle cowl airfoil. USP2014068739515.