薄液膜二维表面驻波的流动稳定性研究  

Flow Stability Investigation of Two-dimensional Surface Stationary Waves on a Thin Liquid Film

作　　者：叶学民[1] 李春曦[1] 阎维平[1] 

机构地区：[1]华北电力大学动力工程系,河北保定071003

出　　处：《热能动力工程》2004年第6期589-592,共4页Journal of Engineering for Thermal Energy and Power

基　　金：教育部高等学校博士学科点专项科研基金资助项目 (1 9990 0 790 2 ) ;华北电力大学博士学位教师科研基金资助项目 (0 931 0 0 1 4)

摘　　要：驻波作为薄液膜表面波中的一种波 ,其流动稳定性受界面热不平衡效应的影响。基于边界层理论和界面热不平衡效应 ,推导出沿倾斜璧面下降的在蒸发、等温和冷凝状态下普遍适用的二维表面驻波空间稳定性方程 ,从理论上深入分析了热不平衡效应、流体物性、壁面倾角和雷诺数对驻波稳定性的影响。研究表明 :热不平衡效应对驻波稳定性的影响仅在小雷诺数下较为明显 ,在高雷诺数下 ,稳定性主要取决于惯性力和粘性力 ;The flow stability of stationary waves, a kind of surface wave on a thin-liquid film, is subject to the influence of thermal non-equilibrium effect at a vapor-liquid interface. On the basis of boundary layer theory and thermal non-equilibrium effect derived is a spatial stability equation of the two-dimensional surface stationary waves universally applicable on evaporating, isothermal or condensing liquid films draining down along an inclined wall. From a theoretical viewpoint an in-depth analysis was conducted of the influence of thermal non-equilibrium effect, fluid physical properties, wall surface inclination angle and Reynolds number on the stability of stationary waves. The results of the study indicate that the influence of thermal non-equilibrium effect on the stability of the stationary waves is relatively significant only under small Reynolds numbers. At higher Reynolds numbers the stability is mainly dependent on inertial force and viscosity force. In the whole range of Reynolds number, fluid physical properties and wall surface inclination angle all play a very conspicuous role.

关 键 词：蒸发 冷却 热不平衡效应 薄液膜 驻波 稳定l生 

分 类 号：TK124[动力工程及工程热物理—工程热物理] O357.1[动力工程及工程热物理—热能工程]