臨界域を含むフロン系作動媒体の管内流熱伝達 : 第3報,ポストドライアウト域の熱伝達

概要

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Studies of the post-dryout heat transfer were made based on the experimental data of the heat transfer to Freon 22 flowing upword in vertical, uniformly heated round tubes ( 9and 13 mm ID) for a range of reduced pressure of 0.68 to 0.92, mass velocity of 400 to 1600 kg/(m^2・s) and heat flux of 12 to 70 kW/m^2. The wall temperatures estimated by the use of a conventional, theoretical model agreed qualitatively with those measured, but not quantitatively. A nondimensional parameter Kn was introduced to a model for the post-dryout regime to take account of the thermodynamic nonequilibrium between the vapor and the liquid droplets. A correlation of Kn was obtained, and this correlation, used with the correlation for the heat transfer to the superheated vapor, was successful in predicting
一般社団法人日本機械学会の論文
1985-02-25