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Noise reduction device for rotorcraft

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64C-027/46   
미국특허분류(USC) 416/90A ; 244/1 ; N ; 244/199
출원번호 US-0459722 (1995-06-02)
우선권정보 JP-0170431 (1994-06-30)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 13  인용 특허 : 0
초록
▼

A noise deduction for a rotorcraft includes a unit to produce compressed air, a drive shaft provided with a first air supply passage in which the compressed air from the air-producing unit flows, and rotor blades provided with second air supply passages in which the air from the first air supply passage flows. In order to eject the compressed air supplied from the rotor blades, ejection nozzles having an ejection adjusting mechanism therein are arranged at respective blade tips of the rotor blades and respective trailing edges thereof in the rotational d...

대표
청구항
▼

A noise reduction device for a rotorcraft having a fuselage, comprising: an air-producing means for producing compressed air, said air-producing means being arranged in said fuselage of said rotorcraft; a drive shaft driven by an engine of said rotorcraft, said drive shaft having a first air supply passage formed therein so as to connect with said air-producing means to permit the flow of the compressed air; rotor blades connected to said drive shaft, each of said rotor blades having a second air supply passage formed therein to communicate with said fir...

이 특허를 인용한 특허 피인용횟수: 13

  1. Mau, Knut; Grünewald, Michael; Reichenberger, Johann; Borchers, Ingo; Drobietz, Roger. Aerodynamic flap of an aircraft having a device which influences the flap vortex. USP2012018096513.
  2. Isotani, Kazuhide; Hayama, Kenji. High-lift device of air vehicle. USP2017109789955.
  3. De Roche,Mark Stephen. Hybrid drive powered lift platform. USP2007067231997.
  4. Betzina, Mark D.; Nguyen, Khanh Q.. Method and system for active noise control of tiltrotor aircraft. USP2003126671590.
  5. Scott, Mark W.. Mission adaptive rotor blade. USP2016119505492.
  6. 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.
  7. Hassan Ahmed A. ; Tadghighi Hormoz ; Janakiram Ram D.. Oscillating air jets for reducing HSI noise. USP2001056234751.
  8. Leishman, John G.; Han, Yong Oun. Rotor blade system with reduced blade-vortex interaction noise. USP2005096948906.
  9. Bruce D. Charles ; Ahmed A. Hassan ; Hormoz Tadghighi ; Ram D. JanakiRam. Tapered/segmented flaps for rotor blade-vortex interaction (BVI) noise and vibration reduction. USP2002116478541.
  10. Ngo Hieu Thien. Tip vortex reduction system. USP1998085791875.
  11. Remington Paul J. ; Coney William B. ; Curtis Alan Robert Douglas. Use of flow injection and extraction to control blade vortex interaction and high speed impulsive noise in helicopters. USP2001096283406.
  12. Gutmark Ephraim J. ; Guillot Stephen A.. Vortical lift control over a highly swept wing. USP2000106138955.
  13. Loth,John L.. Vorticity cancellation at trailing edge for induced drag elimination. USP2006117134631.

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