下面加熱の水平長方形管内複合対流中の縦渦の生成と制御に関する研究 : 発達した乱流域

概要

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This research aims at controlling the bouyancy-driven longitudinal rolls in a horizontal rectangular duct heated from below by properly setting the side wall temperature profile. Experiment for the Reynolds number ranging from 2400 to 12000 reveals time-averaged stable rolls which change their patterns depending on the Reynolds number and the side wall temperature profile. This result is extremely different from the previous one (Mori and Koizumi 1989) for the Reynolds number 220 which revealed unsteady flows with a time-averaged uniform temperature on the horizontal plane. A numerical calculation for high Reynolds number flow using the k-ε model, in which the Reynolds stresses in the cross section are approximated by the algebraic stress expressions, is performed for comparison with experiment.
一般社団法人日本機械学会の論文
1991-03-25