ワイヤーコイル付き垂直管内における強制流動沸騰熱伝達と限界熱流束特性 : 熱工学, 内燃機関, 動力など

概要

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Boiling heat transfer and critical heat flux characteristics were experimentally investigated in a SUS 316-vertical tube with a teflon-coated wire coil of varying wire diameter and pitch using HCFC -123 as the working fluid. The tube wall was uniformly heated by a direct electric current. The experimental conditions were mass flux G=200〜400 kg/m^2s and the thermal equilibrium qualities at the exit of the tube x_<eq> =0.1〜0.8. The values of the boiling heat transfer coefficients in the tube with a wire coil were similar to those in the smooth tube in a nucleate boiling region, but in the region of forced convective evaporation a little enhancement of the heat transfer was observed. The critical heat fluxes in the tube with a wire coil at higher quality region were larger than those in the smooth tube.
社団法人日本機械学会の論文
2001-01-25