【摘要】 采用边界层相似解对恒热流竖壁下降液膜发展段中的层流流动与换热特性进行了分析，获得了发展段长度，液膜厚度和无量纲换热系数的计算表达式。更多还原

【Abstract】 With the help of a boundary layer analogous solution an analysis is conducted of the laminar flow and heat exchange characteristics in the constant heat flow vertical wall downcoming liquid film development section.Obtained is the calculation expression of the development section length,liquid film thickness and non dimensinal heat exchange factor.更多还原