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특허 상세정보

Drag reduction method and surface

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64C-021/10   
미국특허분류(USC) 244/200 ; 244/130 ; 244/203
출원번호 US-0341565 (1989-04-21)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 44  인용 특허 : 0
초록

Rearward facing microsteps (11, 12, 20, 21) are provided in a wall surface (10, 10a, 10b, 19, 19a, 19b) to reduce shear friction drag caused by wall surface bounded turbulent shear flows. Microsteps combined with phased tangential flow injection adjacent the microsteps are also described. These reduce the drag caused by eddy currents. The surface is useful in any setting where turbulent flow occurs to create eddy currents such as airplanes, boats, vehicles, conduits and the like.

대표
청구항

A device which reduces skin friction drag caused by wall surface bounded turbulent shear flow of a fluid by controlling the flow characteristics within the wall surface bounded shear flow through interference with eddy current formation and interactions near the wall surface which comprises microsteps each with a downstream facing face in the surface oriented across a mean flow direction along the wall surface and stepped down in the mean flow direction, wherein the face of each of the microsteps has a height on the order of magnitude of a sublayer thick...

이 특허를 인용한 특허 피인용횟수: 44

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  22. Conners, Timothy R.. Low shock strength propulsion system. USP2014068739514.
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  25. Li, Ming; Marinelli, James M.; Liu, Jiantao; Magnusen, Paul E.; Sheu, Simon; Heinimann, Markus B.; Liu, John; Vega, Luis Fanor. Metal sheets and plates having friction-reducing textured surfaces and methods of manufacturing same. USP2013058444092.
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  32. Rawlings, Diane C.; Keough, Bruce K.; Olli, Larry K.; Burg, Alan G.; Kestner, James M.; Granger, George Michael; McGarvey, James Charles. Multilayer riblet applique and methods of producing the same. USP20181010105877.
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  35. Rawlings, Diane C.; Roe, George M.; Keller, Peter C.. Reduced solar absorptivity applique. USP2014058733702.
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