壁面からの吹出し・吸込みによる摩擦低減制御下にある壁面乱流温度場の数値解析

概要

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Numerical simulations of the velocity and temperature fields in a fully developed turbulent channel flow were arried out. It is well known that the similarity between the heat transfer and the friction exists in such a turbulent wall bounded flow as the Reynolds analogy. We applied a turbulence control to reduce the drag reduction by blowing and suction on the channel walls. And it is found that the heat transfer rate reduces as well as the skin friction does. But the rate of the heat transfer to the momentum transfer 2St/C_f is a little larger than that of the natural (no-control) flow. The correlation between velocity and temperature fluctuations weakens owing to the local pressure gradient when the blowing velocity is imposed on the wall against the fluid moving toward the wall (sweep).
一般社団法人日本機械学会の論文
2000-09-25