空间科学学报2011，Vol.31Issue(1)：57-62,6.
液滴真空闪蒸/冻结过程的热动力学研究
Thermodynamics of Flashing/Freezing Process of a Droplet in Vacuum
赵凯璇 1赵建福 2陈淑玲 1杜王芳2
作者信息
- 1. 中国科学院力学研究所微重力重点实验室,北京,100190
- 2. 北京交通大学机械与电子控制工程学院,北京,100044
- 折叠
摘要
Abstract
To reveal the mechanism of the flashing/freezing process of a liquid droplet in vacuum,a new model of heat and mass transfer in the flashing/freezing process was established using a quasiequilibrium process of mass and heat transfer.Based on the numerical results of the variation of droplet's size and temperature, influences of four factors, namely ambient pressure, ambient temperature, initial radius and temperature of the droplet, on the variation of pre-cooling time in the flashing sub-process, freezing time in the fast freezing sub-process and the final temperature of the process were analyzed in detail.Compared with the experimental data, the present model can predict the basic features of the process with a good reliability.The ambient pressure is the dominating factor determining the major features and the final temperature of the process.The initial temperature affects the flashing rate, while initial radius influences the pre-cooling time.The influence of the ambient temperature is too slight that can be neglectable.关键词
闪蒸/冻结/液滴Key words
Flashing/ Freezing/ Droplet分类
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赵凯璇,赵建福,陈淑玲,杜王芳..液滴真空闪蒸/冻结过程的热动力学研究[J].空间科学学报,2011,31(1):57-62,6.
