柔らかい壁面上の乱流表面摩擦の低減(G05-6 内部流れ・境界層(2),G05 流体工学部門一般講演)

概要

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Over the past forty years many investigations on a reduction of a skin-friction drag using compliant surfaces have been carried out to understand a delay of transition-processes from a laminar flow to a turbulent flow on compliant surfaces. Recently, the friction-drag reduction in turbulent boundary-layer flows on compliant surfaces was reported although its detailed mechanism was not sufficiently understood. This paper describes velocities, turbulent intensity, Reynolds-stress profiles and the friction-drag reduction in the turbulent boundary-layer on compliant surfaces which have 2.45MPa elastic modulus, and 10mm, 5mm and 1mm thicknesses. The results clearly indicate the turbulent friction-drag reduction up to 15%.
社団法人日本機械学会の論文
2004-09-04