气泡微液底层蒸干特性分析  

EVAPORATING CHARACTERISTICS OF MICROLAYER UNDER A BUBBLE

作　　者：李春辉[1] 彭晓峰[1] 李智敏[1] 

机构地区：[1]清华大学热能工程系,北京100084

出　　处：《工程热物理学报》2001年第S1期121-124,共4页Journal of Engineering Thermophysics

基　　金："973"重大基础研究项目(No.G2000026301);国家自然科学基金资助项目(No.59976016)

摘　　要：本文从气泡微液底层的流动特性出发，利用Ｈａｌｌｉｎａｎ和Ｅｒｖｉｎ模型对微层蒸干的Ｓｔｒａｕｂ判据进行了理论分析，证实了临界蒸干半径与湿润性有关，同时指出微层蒸发中起关键作用的是膨胀压力而不是表面张力梯度。Using the Hallnan and Ervin's Model, the flow and evaporation in bubble microlayer was theoretically analyzed, and the dryout characteristics and Staub's criterion was discussed in detail. It was revealed that the critical dryout radius is associated with wettability of heated surface, and the dominant role in microlayer evaporation is disjoining pressure, not surface tension gradient.

关 键 词：微层 临界半径 临界热负荷 湿润性 

分 类 号：TK124[动力工程及工程热物理—工程热物理]