曲がり管内振動流に関する研究 : 第4報,入口付近の速度分布

概要

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Oscillatory laminar flow in the inlet region of a circular curved pipe, with a curvature ratio of 11.7, has been investigated by the flow visualization method. The experiments were carried out under the conditions of the Womersley numbers α=5.5〜18 and the Dean number D=300. The velocity was measured using a tracer technique and the instantaneous velocity distributions were obtained at four selected phases in one cycle. The flow mechanism has been made clear in the region from the upper stream tangent to the curved pipe. The flow in the curved pipe is closely related to the flow in the upper stream tangent, and the velocity distribution changes drastically with the phase at the inlet region. The inlet length of oscillatory flow is less than that of steady flow and becomes shorter as α increases.
一般社団法人日本機械学会の論文
1994-01-25