サブクール沸腕における膜沸跳熱伝達と極小熱流東点条件に関する研究 : 第1報,白金球-大気圧水のプール沸騰系

概要

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In the present, film boiling heat transfer and minimum heat flux condition were experimentally studied for subcooled pool boiling of water at atmospheric pressure from a platinum sphere (D=10 mm). Transient tests of subcooled boiling were conducted from an initial temperature of the sphere about 1500K. Experimental parameters were liquid subcooling (0~75 K) and the depth of immersion of the sphere (0.75 D~3.0 D). The obtained boiling curves indicated that the ideal depth was 1.8D. Even for large subcooling conditions, the measured temperature at the minimum heat flux point for such a depth did not remarkably exceed the maximum superheat of water. Further, accounting for the density-viscosity ratio, the analytical equation for subcooled film boiling derived by Hamill and Baumeister was modified. This modified equation was in good agreement with experimental data of water and freon-11 under various conditions of surface geometry, size and system pressure.
一般社団法人日本機械学会の論文
1986-04-25