二相熱サイフォンの限界熱流束の解析的研究

概要

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An analytical study has been made of critical heat flux of a two-phase thermosyphon, in which a liquid film and a vapor flow in a manner of countercurrent annular flow. An equation governing the flow of the liquid film and other equations for mass and energy balance in the thermosyphon are solved together under two conditions ; first, the critical heat flux takes place when liquid supply to the thermosyphon is just equal to the evaporation of the liquid due to the heat input into it, and second, thickness of the liquid flow is determined such that interface of the annular flow is kept stable. Thereby, two correlations are derived for both limiting conditions of 2/(C^2_ik^2N_k) and then one of them for 2/(C^2_ik^2N_k)≫1 is in good agreement with the existing CHF data in a closed two-phase thermosyphon as well as a generalized correlation derived from dimensional analysis.
一般社団法人日本機械学会の論文
1993-04-25