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특허 상세정보

Active blowing system for rotorcraft vortex interaction noise reduction

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64C-027/00   
미국특허분류(USC) 244/017.11 ; 244/207 ; 416/090A ; 416/092 ; 415/119
출원번호 US-0727980 (1996-10-09)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Stout
인용정보 피인용 횟수 : 62  인용 특허 : 0
초록

A pressurized porous surface near the leading edge of a rotorcraft blade, is designed to be used as an active control device which alleviates the aerodynamics of blade vortex interactions (BVI) and thus the impulsive BVI noise levels and signature. The pressurized porous surface can be actuated on an azimuth-dependent deployment schedule or actuated continuously. The pressurized porous surface is supplied with either positively pressurized air, negatively pressurized air, or a combination of both, when actuated. The pressurized porous surface targets the...

대표
청구항

[ What is claimed is:] [1.] An active control device for reducing blade-vortex-interaction (BVI) noise generated by a rotorcraft having a rotor blade including an interior, a tip end, a root end, a leading edge, a trailing edge, an upper surface, a lower surface, a radius, and a chord, the rotor blade being attached at the root end to a rotor hub on the rotorcraft and extending radially outwardly therefrom such that when the rotor hub is rotatably driven the rotor blade rotates about the hub through a 360 degree azimuth, the active control device compris...

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