マクロ液膜乾燥を原因とする限界熱流束モデルへの統計的手法の導入〔熱工学, 内燃機関, 動力など〕

概要

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prediction of pool boiling critical heat flux is studied in this paper. Statistical variances of macrolayer thickness and hovering period of vapor mass are introduced to the conventional macrolayer dry out model. Assumed thickness is twice as thick as the conventional model which coincides with those measured with electrical resistance probes. The effect of distribution function shape is investigated for different skewness factors, which indicates negligible effect even for superheat higher than the critical. As variance of either of hovering period or macrolayer thickness increases, boiling curve is rounded off at the top and critical heat flux decreases for the same averages. When the standard deviation is assumed to be 15-20% of mean value, predicted critical heat flux and dry duration ratio coincide with experiments. These facts show that the macrolayer dry out model is experimentally supported.
一般社団法人日本機械学会の論文
1998-06-25