周期的に拡大, 縮小を繰返す管内乱流の流動と熱伝達 : 速度分布と乱流特性

概要

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Experimental study was carried out to examine the effects of pressure gradient alternating in sign for the turbulent channel flow. Air flow was decelerated through a linearly diverging section, and then accelerated through a linearly converging section. Experiments were performed with two different channels. The velocity profiles in the wall region were displaced above the universal law of the wall, and Karman constant x increases in the converging section. Turbulence intensity and Reynolds shear stress in the converging section were considerably lower than those in the diverging section. The behavior of the increase or decrease of heat transfer coefficient was similar to that of Reynolds shear stress.
一般社団法人日本機械学会の論文
1992-05-25