竖管内蒸发降液膜流动的不稳定性分析  

Instability Analysis of Evaporating Falling Film Flow in Vertical Tube

作　　者：杜小泽[1] 吴少融[1] 姜胜耀[1] 王补宣[2] 

机构地区：[1]清华大学核能技术设计研究院先进反应堆工程与安全教育部重点实验室,北京100084 [2]清华大学热能工程系,北京100084

出　　处：《原子能科学技术》2001年第5期406-410,共5页Atomic Energy Science and Technology

摘　　要：引入能量分析方法 ,探讨流动的惯性力、气液界面和管壁界面上的表面张力对波动薄液膜的作功机制 ,从物理上解释随液膜流动雷诺数及扰动波长的增加以及液膜波动加剧的规律。分析表明The Kelvin-Helmholtz instability of evaporating falling film flow in vertical tube is studied by means of energy analysis. Based on the rules that the interfacial capillary waves come from the balance of works done by inertial force, surface tension on phase change interface, and also capillary force on tube wall, the stability behaviors of falling film with different Reynolds numbers and perturbation wavelength are explored in detail. The analysis indicates that the main reason of film breakup is that, the stability effect of capillary absorbability on tube wall is weakened by increasing tube wall heat flux.

关 键 词：降液膜 不稳定性分析 流动 蒸发降液膜 蒸发传热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]