核沸騰過程におけるミクロ液膜構造に基づく伝熱特性の検討(熱工学,内燃機関,動力など)

概要

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The objective of the study is to elucidate the contribution of micro-layer on heat transfer in nucleate pool boiling of isolated bubble region on the basis of the measurement of configuration of micro-layer. The distribution of micro-layer thickness formed under a growing bubble was measured by laser extinction method using specially devised system with a thin optical fiber in thin tube and gas blowing in the previous report. In this report, the dominant factors determining the characteristics of micro-layer such as micro-layer thickness distribution, duration of micro-layer existence, size of micro-layer area on the heat transfer surface and so-forth were expressed by nondimensional form based on the similarity of bubble growth rate. Finally, the contribution of evaporation from micro-layer in nucleate boiling of isolated bubble region was shown by using the relations among dominant factors.
社団法人日本機械学会の論文
2008-12-25