摘要
本文分析了几种不同的相变与沸腾传热现象,报道了实验考察到的微型槽内的液体流动沸腾,发现液体流动的空间尺度对相变与沸腾形态有重要影响,由此提出液体内部汽化的“汽化空间”与“拟沸腾”两个全新的重要概念,分析讨论了小尺度液体的相变传热机理,并对“拟沸腾”过程的可能机制及物理模型尝试作出定性分析。文中还引用新概念对核沸腾的传热机制作了某些新的解释。
Several phenomena for liquid-vapor phase change and boiling heat transfer have been analysed in this paper. It was found from the experiments on the liquid flow boiling in microchannels that the space scale for the liquid flow may have important effects on phase change and corresponding mode of boiling. Hence, we propose two new concepts-the 'evaporating space' (i. e. , the necessary space for evaporation) and the 'fictitious boiling'. We discuss the physical mechanism for liquid-vapor phase change on very small scale of flow space and try to analyse qualitatively the possible 'fictitious boiling' and its physical model. Meanwhile, using the supposed new concept, we have proposed some new explanations on the mechanism of flow film boiling.
出处
《中国科学基金》
CSCD
1994年第1期7-12,共6页
Bulletin of National Natural Science Foundation of China
基金
国家自然科学基金
国家教委回国人员启动基金
