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采用耦合的水平集-体积分数法(CLSVOF)对双液滴连续撞击恒定壁温壁面上的热液膜的流动和换热特性进行了数值模拟及分析,得到了双液滴撞击热液膜后形态演变的过程.分析了液滴垂直间距、撞击速度、液膜厚度以及液滴直径对双液滴撞击液膜后的流动与传热特性的影响,结果显示,壁面平均热流密度随液滴撞击速度的增大而增大,液滴垂直间距、液膜厚度和液滴直径对平均热流密度的影响较小,但会对热流密度在撞击区域和交界区的分布产生重要影响.
The flow and heat transfer characteristics of a continuous liquid droplet on a constant wall temperature wall were numerically simulated and analyzed by coupled level set-volume fraction method (CLSVOF) The influence of droplet vertical distance, impact velocity, liquid film thickness and droplet diameter on the flow and heat transfer characteristics of double droplets after impacting on the liquid film was analyzed. The results showed that the average heat flux density The vertical distance between droplets, the thickness of liquid film and the diameter of droplet have little influence on the average heat flux density, but will have an important influence on the distribution of heat flux density in the impact area and the junction area.