基于微肋管的微沟槽表面薄液膜沸腾理论模型  

THEORETICAL MODEL OF THIN FILM EVAPORATION HEAT TRANSFER BASED ON GROOVED SURFACE OF MICRO-FIN TUBES

作　　者：王跃社[1] 周芳德[1] 本田博司[2] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049 [2]日本九州大学

出　　处：《工程热物理学报》2004年第3期445-447,共3页Journal of Engineering Thermophysics

基　　金：教育部留学回国人员科研启动基金

摘　　要：本文提出了基于微肋管的薄液膜蒸发沸腾的输运现象数学模型及其有限差分求解方法。数值模拟结果表明,在蒸发扩张半月形液膜中,非蒸发液膜区域液膜形状主要取决于分子膨胀压力;在薄液膜区域与非蒸发区域的连接处存在着一个强烈的蒸发点,这是膨胀压力和表面张力共同作用的结果;在本征半月形液膜区域压力梯度几乎完全取决于表面张力,因而在该区域内液膜形状可以假定为圆弧形状。The mathematic model for the transportation phenomenon of thin film evaporation based on microfin tubes, as well as its finite difference numerical method, was conducted. The numerical results showed that along the extensive meniscus liquid film based on the grooved surface, disjoining pressure is responsible for the non-evaporation film region. A majority of the heat transfer occurs at the junction of non-evaporation region and thin film region, which resulted from disjoining pressure and surface tension, simultaneously. During the illtrinsic meniscus film region, the pressure difference depends completely on the surface tension and the film shape was assumed to be circular arc.

关 键 词：微肋管 非蒸发液膜 蒸发薄液膜 本征半月形液膜 

分 类 号：TK124[动力工程及工程热物理—工程热物理]