Drag reduction by riblet viewed as roughness problem.
نویسندگان
چکیده
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The interaction of the overlying turbulent flow with riblets, and its impact on their drag reduction properties are analysed. In the so-called viscous regime of vanishing riblet spacing, the drag reduction is proportional to the riblet size, but for larger riblets the proportionality breaks down, and the drag reduction eventually becomes an increase. It is found that the groove cross section A(...
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ژورنال
عنوان ژورنال: Proceedings of the Japan Academy, Series B
سال: 1988
ISSN: 0386-2208,1349-2896
DOI: 10.2183/pjab.64.21