1面に粗面をもつ長方形流路内の乱流 : 短辺壁が粗面の場合

概要

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An experimental study has been conducted on a fully developed turbulent flow through a rectangular duct with one roughened short-side wall. Detailed results have been obtained for mean velocities and turbulent stresses using hot-wire anemometers. One large secondary-flow vortex appeared near the corner formed by the smooth and roughened walls ; it was similar to that obtained in the rectangular duct having one roughened longer-side wall. Near the corner formed by the two smooth walls, the secondary-currents proceeded for the corner like those ion a smooth walled duct. Furthermore, it was found that in the rough duct, the contribution of turbulent shear stress <u_2u_3>^^^- was as important as that of anisotropy of cross-planar normal stresses (<u^2_2>^^^--<u^2_3>^^^-) for the generation of the secondary-flow of the second kind.
一般社団法人日本機械学会の論文
1989-08-25