理論応用力学講演会 講演論文集
第64回理論応用力学講演会
セッションID: OS2-02-01
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OS2-2 マルチスケール・マルチフィジックス熱流体工学の最前線(2)
不凝縮気体存在下における温度変化のある鉛直管外の凝縮熱伝達
金谷 健太郎木倉 宏成
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Condensation heat transfer on the exterior surface of a vertical tube in the presence of noncondensable gas is investigated taking into account temperature variation of the tube and the coolant flowing within the tube. A heat transfer model is derived by employing energy conservation and the heat transfer coefficients of both the inside and the outside of the tube, which have been previously proposed. The model is compared to an experiment in the past, and a correction factor of the outer heat transfer coefficient is estimated. As a result, it is shown that the correction factor depends on the concentration of the gas mixture or the subcooling of the tube. Furthermore, a new expression of the outer heat transfer coefficient is proposed, whose correction factor varies against the subcooling smaller than the previous one.

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