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특허 상세정보

Active control of boundary layer transition and turbulence

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64B-021/00   
미국특허분류(USC) 244/203 ; 244/204 ; 244/130 ; 114/67A
출원번호 US-0838649 (1986-03-11)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 33  인용 특허 : 3

The invention is a boundary flow control system and method which comprises heating elements 24 to trigger boundary layer transition and audio speakers 83 to provide acoustic suppression 51 of boundary layer turbulence 52. The trigger and suppression control are activated by a feedback amplifier 82 which reads boundary layer flow conditions using an anemometer probe 81. The active control of the boundary layer permits delay of flow separation and a reduction in skin friction drag as compared to natural flow conditions.


A system for active control of boundary layer flow comprising in combination: a flow surface; a plurality of heater strips are embedded in and flush with said flow surface and extending spanwise along said surface in a region of positive pressure gradient for triggering boundary layer transition from laminar to turbulent flow; sensor means disposed on said flow surface for sensing flow oscillations thereon downstream of said triggering means; feedback means connected to said sensor means; and means for controlling the amplitude of turbulent boundary laye...

이 특허를 인용한 특허 피인용횟수: 33

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