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특허 상세정보

Streamwise variable height riblets for reducing skin friction drag of surfaces

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64C-023/00   
미국특허분류(USC) 244/200; 244/130; 244/199
출원번호 US-0548970 (2000-04-13)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Bracewell & Patterson, L.L.P.
인용정보 피인용 횟수 : 44  인용 특허 : 8
초록

A series of parallel riblets extend from a smooth, aerodynamic surface for reducing the skin friction drag of the surface an airstream flows around it. The riblets extend longitudinally along the surface and have a triangular cross-section in the transverse direction. The apex of the cross-section defines a continuous, undulated ridge with peaks and valleys. Measured from the surface, the peaks have a greater height than the valleys. The interaction of the riblets with the structure of the turbulent boundary layer of the airstream reduces the skin fricti...

대표
청구항

1. An apparatus for reducing skin friction drag on a surface, the apparatus comprising:a plurality of parallel riblets wherein, in a Cartesian coordinate system with x, y, and z-axes, each of the riblets extends lengthwise in an x-direction and has a longitudinal profile in an x-z-plane with a variable height in a z-direction, and wherein the riblets are adapted to be mounted to a surface that is subjected to fluid flow in the substantially x-direction; and wherein each of the riblets has a plurality of peaks in the x-z plane separated by valleys of less...

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