自由表面摩擦和蒸发对过冷下降液膜传热的影响  

The effect of Free Surface Friction and Evaporation on the Heat Transfer of Sub-cooled Falling Liquid Film

作　　者：师晋生[1] 陈玉宙[1] 等 

机构地区：[1]中国原子能科学研究院，北京102413

出　　处：《热能动力工程》2001年第4期383-385,392,共4页Journal of Engineering for Thermal Energy and Power

摘　　要：从理论上对下降液膜在自由表面上存在反向剪切力和蒸发散热情况下的换热特性进行了分析 ,得到了膜厚 ,换热系数的无量纲关系式 ,讨论了剪切力、液膜雷诺数、壁面热流、蒸发率对流动和传热的影响。A theoretical analysis was conducted of the heat exchange characteristics of a falling liquid film under the condition of evaporative heat dissipation and of the presence on the free surface of a reverse shearing force. As a result, obtained was a non-dimensional relation of the film thickness and heat exchange factor. Also discussed was the influence of shearing force, liquid film Reynolds number, wall surface heat flux and evaporation rate on the flow and heat transfer.

关 键 词：下降液膜 逆向流动 传热 自由表面摩擦 蒸发 换热 过冷 

分 类 号：TK124[动力工程及工程热物理—工程热物理]