曲り管内脈動流に関する研究 : 第4報,二次流れ

概要

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The secondary flow pattern was clarified experimentally by the visualization method, for a fully-developed pulsating flow through a circular curved pipe with a curvature ratio of 7.6. The experiments were carried out under the conditions of the Womersley numbers α=5.5〜18, the mean Dean numbers D^^-=90 and 200, and the flow rate ratios η=0.5 and /or 1. The pictures were taken at selected four phase positions, i. e., Θ=0゜, 90゜, 180゜and 270゜. The instantaneous velocity profiles, the center of vortices and the kinetic energy of the secondary flow were determined with the aid of the photographs and compared with the results obtained by the numerical analysis. On the experimental and analytical results, a discussion is given for the transition of the secondary flow patterns in a period and the effects of the Womersley number on the flow behavior.
一般社団法人日本機械学会の論文
1988-09-25