壁面温度对疏水表面上水滴冻结的影响  

Effect of Cold Plate Temperature on Water Droplet Freezing on Hydrophobic Surface

作　　者：黄玲艳[1,2] 刘中良[1] 勾昱君[1,3] 刘耀民[1] 

机构地区：[1]北京工业大学传热强化与过程节能教育部重点实验室及传热与能源利用北京市重点实验室,北京100124 [2]北京航天发射技术研究所,北京100076 [3]唐山学院,河北唐山063000

出　　处：《工程热物理学报》2012年第6期1009-1012,共4页Journal of Engineering Thermophysics

基　　金：北京市科技计划项目(No.Z07020600290793)

摘　　要：本文研究了冷壁面温度对疏水表面(θ=108.8°)上单个水滴冻结过程的影响,比较了水滴的冻结时间及冻结前后的形态变化。结果表明,水滴冻结所需要的时间随冷表面温度的降低而减小,冷表面温度越低,水滴冻结后其顶端越容易出现树枝状霜晶生长。最后,根据能量守恒原理建立了冷表面上水滴冻结的数学模型,给出了相应的表达式,进而分析了壁面温度对水滴冻结时长的影响,计算结果与实验结果一致。The effect of cold plate temperature on water droplet freezing process on hydrophobic surface was investigated; the water droplet freezing time and freezing shape were compared. The experimental results showed the water droplet freezing time decreases with the decreasing of cold plate temperature. The lower the cold plate temperature is, the stronger the dendritic frost crystals grow on the frozen water droplet surface. A mathematic model for the water droplet freezing time was proposed based on energy conversation, the effect of cold plate temperature on water droplet freezing was analysed, and the prediction results of the model is in general agreement the experimental results.

关 键 词：疏水表面 冻结 接触角 

分 类 号：TK124[动力工程及工程热物理—工程热物理]