平板乱流境界層内に設置された球まわりの流れ(流体工学,流体機械)

概要

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The flow around a sphere placed at various heights above a plane boundary has been investigated. The diameter of the sphere was d=57 mm, the gap between the sphere and the plane was various from 0 to 30 mm. The turbulent boundary layer thickness where the sphere was placed was various from 26 to 120 mm. The Reynolds number based on d was 8.3 × 10^4. The flow visualizations by the smoke wire method and the surface oil-flow pattern method were carried out. The surface pressure distributions on the sphere and the plane were measured and the drag and lift coefficients were determined by integration of the surface pressure of the sphere. It was found that the effects of the plane, the gap and the thichness for the characteristics of the flow around the sphere and the fluid force acting on the sphere.
一般社団法人日本機械学会の論文
2003-05-25