体积力与强制对流共存时椭圆柱外的膜态沸腾换热

Heat Transfer of Film Boiling on an Elliptical Cylinder When Forced Convection Coexists With Volumetric Force

本文研究了体积力与强制对流共存时椭圆柱外的膜态沸腾换热问题;分析了共存参数、显潜热比参数以及椭圆柱形状与局部位置对换热的影响;得到了分离角,估计了分离发生的条件;计算了汽液边界层的速度场。

The heat transfer of film boiling on an elliptical cylinder when forced convection coexists with volumetric force is investigated. The effect of the coexistent parameter, the ratio of sensible heat to latent heat and the form and location of the elliptical cylinder on heat transfer are analyzed. The separated angle is obtained and the conditions for occurrence of separation are evaluated. The calculating results of velocity distribution along the vapor-liquid boundary are reported.