本文对冷表面上的水滴冻结过程进行了研究.用显微成像系统对该过程进行了现象观察,采用热电偶对水滴中心温度进行了测量.实验发现,水滴温度随冷表面温度下降而下降,稍低于0℃时没有显著相变.水滴温度继续降低到约-5℃时发生明显相变,同时,水滴中心温度迅速回升并维持在稍低于三相点温度,冻结锋面到达热电偶所在的水滴中心位置后又逐渐下降,直到非常接近冷表面温度.建立了该过程的数学模型并进行了数值模拟,结果与实验基本符合.
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