竖直管内液膜层流时汽-液界面切应力对冷凝过程的影响  

The Influence of Interfacial Shear on Laminar Film Condensation in a Vertical Tube

作　　者：潘阳[1] 胡桃元[1] 王修伟[2] 

机构地区：[1]华东交通大学土木建筑学院,江西南昌330013 [2]江西省科学院能源研究所,江西南昌330029

出　　处：《江西科学》2000年第4期214-220,共7页Jiangxi Science

基　　金：江西省自然科学基金资助项目! ( 9860 2 9)

摘　　要：根据冷凝的控制方程及边界条件 ,采用数值计算方法得到了冷凝模型的解。根据冷凝过程的特点 ,将其分为液膜形成段和液膜成型段 ;并对蒸汽的不同流向 ,以及影响界面切应力和冷凝过程的主要机制和因素 ,如反映蒸汽速度对界面和冷凝影响的相对速度比B ,表征由传质引起动量传递的因子U分别进行了讨论 ,并就本文解与努塞尔解进行了比较。Based on the condensation governing equations and the associated boundary conditions,the paper,by means of the numerically computational method,solves the model of the condensation.According to the characteristics of the condensation,condensation process is divided into two sections,forming liquid film section and formed liquid film section;the main mechanism and factors effecting on interfacial shear and condensation are discussed for different vapor flow direction,such as the relative velocity ratio B reflecting effect of vapor velocity on interface and condensation,and the factor U characterizing momentum transfer caused by mass transfer.Comparison between the present study and Nusselt solution is proceeded.

关 键 词：冷凝 传质 切应力 汽-液界面 液膜层流 液膜凝结 液膜成型 液膜形成 虹吸管 

分 类 号：TK124[动力工程及工程热物理—工程热物理]