实验研究了快速降压过程中悬挂单水滴闪蒸/冻结过程,得到了典型条件下液滴闪蒸/冻结过程的热动力学特征,并基于实验观测结果,探讨了不凝气体对液滴闪蒸/冻结热动力学过程的影响。实验发现,起始冻结时的液滴过冷度近似为常数,而再辉温度对应于终态蒸汽分压所确定的气固相变平衡温度。这些结果有助于正确预言高真空环境中的液滴闪蒸/冻结特征。 The flash-freezing / freezing process of single-drop suspension during rapid depressurization was experimentally studied. The thermodynamic characteristics of the flash-freeze / freeze process under typical conditions were obtained. Based on the experimental observations, the effects of non-condensable gases on droplet flash Effect of Steam / Freeze Thermodynamic Process. The experimental results show that the subcooling degree of the droplets at the initial freezing is approximately constant, and the reflow temperature corresponds to the equilibrium temperature of the gas-solid phase transition determined by the final partial pressure of steam. These results help to correctly predict droplet flash / freeze characteristics in high vacuum environments.