軸方向流れのある回転二重円管の熱伝達

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  • Convective Heat Transfer of the Rotational and Axial Flow between Two Concentric Cylinders
  • ジク ホウコウ ナガレ ノ アル カイテン ニジュウエンカン ノ ネツ デンタツ

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This paper considers the convective heat transfer of the flow in the annular gap with axial flow between a rotating inner cylinder and a stationary outer cylinder. The experimental results indicate that the heat flow from the surface of the inner rotating cylinder is the sum of the following two kinds of the heat flow : one by turbulent vortices induced by rotation instead of Taylor vortices and the other by the turbulent axial flow. For turbulent vortices we have the empirical equation for the overall heat transfer coefficient when without axial flow : [numerical formula] Moreover for the turbulent axial flow we have the empirical equation in the heat transfer coefficient : [numerical formula] Here is shown that this correlation of summing up the two heat flows is applicable to the wide region of such mixed flow.

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