著者

和田 訓佳 大竹 浩靖 小泉 安郎

出版者

一般社団法人 日本機械学会

雑誌

年次大会講演論文集

巻号頁・発行日

vol.2002, pp.229-230, 2002

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The onset nucleate boiling and the point net vapor generation on subcooled flow boiling, focusing on liquid subcooling and liquid velocity were investigated experimentally and analytically. Experiments were conducted using a copper thin-film (35μm) and subcooled water in a range of the liquid velocity from 0.27 to 4.6m/s at 0.10MPa. The liquid subcoolings were 20,30 and 40K, respectively. Temperatures at the onset nucleate boiling obtained in the experiments increased with the liquid subcoolings and the liquid velocities. The increase in the temperature o* ONB was represented with the classical stability theory of preexisted nuclei. The measured results of the net vapor generation agreed well with the results of correlation by Saha and Zuber in the range of the present experiments. The temperature at the ONB decreased with increasing the size of surface roughness. The NVG was independent on the surface roughness.