| 快速减压条件下液滴热动力学行为的实验研究 |
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| 引用本文： | 杜王芳,赵建福,李凯.快速减压条件下液滴热动力学行为的实验研究[J].工程热物理学报,2012(8):1349-1352. |
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| 作者姓名： | 杜王芳 赵建福 李凯 |
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| 作者单位： | 中国科学院力学研究所微重力重点实验室 |
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| 基金项目： | 中国科学院“知识创新工程”资助项目 |
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| 摘 要： | 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。
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| 关 键 词： | 液滴 闪蒸 冻结 不凝气体 |
Experimental Study on Thermal-Dynamical Behaviors of Liquid Droplets During Quick Depressurization |
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| DU Wang-Fang ZHAO Jian-Fu LI Kai.Experimental Study on Thermal-Dynamical Behaviors of Liquid Droplets During Quick Depressurization[J].Journal of Engineering Thermophysics,2012(8):1349-1352. |
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| Authors: | DU Wang-Fang ZHAO Jian-Fu LI Kai |
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| Institution: | DU Wang-Fang ZHAO Jian-Fu LI Kai (Key Laboratory of Microgravity/CAS;Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China) |
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| Abstract: | The evaporating-freezing process of single pensile water droplet during quick depressurization is studied experimentally.The typical characteristics of the thermal-dynamical behaviors of this process are obtained.Based on the experimental observations,the influences of non-condensable gases on the process are analyzed and discussed in detail.It is pointed out that the subcooling corresponding to the onset of freezing of the droplet is nearly a constant,and the recalescence temperature is approximatively equal to the vapor-solid equilibrium temperature determined by the partial pressure of vapor at the terminal state.The present results are helpful for predicting correctly the evaporating-freezing processes of liquid droplets in high vacuum environment. |
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| Keywords: | liquid droplets flashing freezing non-condensable gases |
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