热非平衡和切应力作用下液膜流的扰动传播特性  

Perturbation dissemination of the liquid film with shear and thermal non-equilibrium effect

作　　者：张润盘[1] 叶学民[1] 王松岭[1] 周耀来 

机构地区：[1]华北电力大学能源与动力工程学院,河北保定071003 [2]中国电能成套设备有限公司,北京100011

出　　处：《华北电力大学学报（自然科学版）》2008年第5期55-60,共6页Journal of North China Electric Power University：Natural Science Edition

基　　金：高等学校博士学科点专向科研基金项目(20040079004)

摘　　要：基于完整边界条件,采用参数摄动法,推导并求解了沿倾斜壁面下降的蒸发或冷凝状态下适用的二维剪切液膜流动的Orr-Sommerfeld方程,得到扰动传播速度的表达式,分析了相变和切应力的影响。研究表明:扰动传播速度受蒸发状态影响而增大,受冷凝影响而减小;正向切应力促使扰动传播速度增大,反向切应力使其减小;在小雷诺数下内,雷诺数对扰动传播速度影响较大,随雷诺数增长,其影响逐渐减弱。The Orr-Sommerfeld equation of the two-dimensional evaporating and condensing liquid films with interfacial shear falling down an inclined wall was established with perturbation method based on the complete boundary conditions. The theoretical relation of perturbation propagation velocity was presented and the effects of phase change and shear stress were discussed. The results show that the perturbation propagation velocity tends to increase under evaporation state and to decrease under condensation state. The eocurrent shear plays a positive role on propagation velocity and countercurrent plays a negative role. The Reynolds number has a notable influence on propagation velocity under smaller Re and little effect under higher Re.

关 键 词：液膜流 相变 相变强度 切应力 

分 类 号：O352[理学—流体力学]