気泡微細化沸騰の発生と安定性

概要

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Microbubble emission boiling (MEB) is the regime that occurs in the subcooled transition boiling region. This experimental investigation reveals that this phenomenon includes two regimes, i. e., the stormy and calm microbubble emission boilings. This study also shows temperature fluctuations of a heat transfer surface and pressure fluctuations in the liquid near the surface to classify MEB into the above regimes. The temperature fluctuations in either regime are smaller than those at the critical heat flux. The pressure fluctuations are larger in the stormy MEB, and smaller in the calm MEB as compared with those at the critical heat flux. The liquid subcooling and flow velocity approaching the surface are important aspects by which to generate those regimes. A number of experiments lead to the map of MEB regimes that consists of liquid subcooling and flow velocity. An oscillatory character between the two regimes appears under several conditions.
社団法人日本機械学会の論文
1992-02-25