二成分混合液のプール沸騰限界熱流束 実験結果と整理式の提案

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  • Critical Heat Flux of Binary Mixtures in Pool Boiling. Experimental Results and a New CHF Correlation.
  • 2セイブン コンゴウエキ ノ プール フットウ ゲンカイ ネツ リュウソク ジ

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Critical heat flux (CHF) of binary mixtures in nucleate pool boiling was newly measured with a horizontal platinum wire, 0.5 mm in diameter, over the full range of concentrations of mixtures including their pure components. Test mixtures were methanol/water, ethanol/water, methanol/ethanol, ethanol/n-butanol, and methanol/benzene, each in the saturated state at atmospheric pressure. The 250 raw CHF data were obtained at the 56 concentrations of the five mixtures. Compared with CHF which would be expected from a single component with the same properties of the mixtures, aqueous mixtures reveal significant increases of CHF, while the other three organic mixtures show the same level of CHF. In correlating the data, a dimensionless Marangoni number was newly introduced to successfully acheive to an empirical correlation of CHF.

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