振動制御形熱輸送管に関する研究 : 振動流の乱流遷移が及ぼす熱輸送特性への影響

概要

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In this paper, experimentally investigated was the effects of transition from laminar to turbulent oscillatory flow within a tube on the effective thermal conductivity of oscillation-controlled heat transport tubes. First, the streamline of oscillatory flow in a tube was experimentally visualized. The visual observation indicates that the transition criteria to the conditional turbulent flow coincide well with those of Kurzweg et al.. Next, heat transport experiments ware conducted to examine an effect of the transition on the effective thermal conductivity along the tube axis. Experimental results show that the transition does not result in a limitation of the effective thermal conductivity but produces an effective thermal conductivity higher than that predicted by the analysis assuming laminar oscillatory flow.
1998-03-25