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有限の下向き水平面の膜沸騰熱伝達に及ぼす液体サブクール度の影響


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Title: 有限の下向き水平面の膜沸騰熱伝達に及ぼす液体サブクール度の影響
Other Titles: Effect of Liquid Subcooling on Film Boiling Heat Transfer from Finite-Size Horizontal Surfaces Facing Downward
Authors: 山田, たかし / 茂地, 徹 / 桃木, 悟 / 金丸, 邦康 / 山口, 朝彦
Authors (alternative): Yamada, Takashi / Shigechi, Toru / Momoki, Satoru / Kanemaru, Kuniyasu / Yamaguchi, Tomohiko
Issue Date: Dec-1998
Publisher: 日本機械学会
Citation: 日本機械学會論文集. B編, 64(628), pp. 4159-4165; 1998
Abstract: The effect of liquid subcooling on the convective film boiling heat transfer from a finite-size horizontal downward-facing surface was investigated both theoretically and experimentally. The approximate solution with some simplified assumptions was obtained by solving the two-phase boundary layer equations including the energy equation for the liquid boundary layer. The average Nusselt number, Nu_co, derived from the solution may be expressed in a simple form with the parameters of Grashof number, density ratio, (density-viscosity) ratio, liquid Prandtl number, dimensionless degree of wall superheating and dimensionless degree of liquid subcooling. The theoretical results were compared in terms of a ratio of the average Nusselt number for the case of subcooled liquid to that for the case of the saturated liquid, Nu_<co>/Nu_<co, sat>, with the experimental data obtained by Nishio et al. under the steady-state condition and those obtained by the present authors using a quenching methed. For the case of subcooled liquids, a correlation equation of heat transfer was proposed to effectively correlate the experimental data obtained under both quenching and steady-state conditions within ±15 percent.
Keywords: Film Boiling / Heat Transfer / Downward-Facing Horizontal Surface / Subcooled Liquid
URI: http://hdl.handle.net/10069/20839
ISSN: 03875016
Relational Links: http://ci.nii.ac.jp/naid/110002397410/
Rights: 社団法人日本機械学会 / 本文データは学協会の許諾に基づきCiNiiから複製したものである
Type: Journal Article
Text Version: publisher
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/20839

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