Natural-Convection Film-Boiling Heat Transfer : Film-Boiling from Horizontal Cylinders in Middle- and Small-Diameter Regions
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概要
- 論文の詳細を見る
In this report, to discuss natural-convection film-boiling heat transfer around horizontal cylinders in the small-diameter region, analytical solutions are derived for subcooled film boiling with a smooth liquid-vapor interface. Next, film boiling experiments around thin horizontal wires are conducted for water and R113 at atmospheric pressure. Results of the experiments indicate that, compared with analyses assuming a smooth interface, saturated film-boiling heat transfer in the small-diameter region is enhanced by both rosary-vapor-film and thick-vapor-film effects. As for the effect of liquid subcooling on film-boiling heat transfer in the small-diameter region, it is found that the small-diameter region can be subdivided into normal and singular regions. In the singular region, heat-transfer coefficients decrease to a minimum with increasing liquid subcooling.
- 一般社団法人日本機械学会の論文
- 1992-11-15
著者
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NISHIO Shigefumi
Institute of Industrial Science, The University of Tokyo
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Ohtake Hiroyasu
Institute Of Industrial Science University Of Tokyo
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Nishio Shigefumi
Institute Of Industrial Science The University Of Tokyo
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