| 液滴真空闪蒸/冻结过程的热动力学研究 |
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| 引用本文： | 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. |
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| 作者姓名： | 赵凯璇 赵建福 陈淑玲 杜王芳 |
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| 作者单位： | 1.中国科学院力学研究所 微重力重点实验室, 北京100190 |
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| 摘 要： | 建立了低压真空环境单液滴闪蒸/冻结过程的热、质传递模型, 探索液滴在真空闪蒸/冻结过程中的热动力学规律和机理. 对液滴真空闪蒸/冻结过程中的温度、尺寸变化进行了计算, 分析了环境压力、环境温度、液滴初始半径与初始温度等因素对液滴闪蒸预冷时间、快速凝固后继续冻结时间和升华再冷最低温度的影响. 结果表明, 模型能够很好地描述液滴真空闪蒸/冻结过程的基本特征; 环境压力控制着闪蒸/冻结过程的主要特征及终态温度, 是主要控制因素; 液滴初始温度主要影响闪蒸速率, 而初始尺寸则主要影响预冷时间; 环境温度的影响可以忽略.
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| 关 键 词： | 闪蒸 冻结 液滴 |
| 收稿时间： | 1900-01-01 |
Thermodynamics of Flashing/Freezing Process of a Droplet in Vacuum |
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| ZHAO Kaixuan,ZHAO Jianfu,CHEN Shuling,DU Wangfang.Thermodynamics of Flashing/Freezing Process of a Droplet in Vacuum[J].Chinese Journal of Space Science,2011,31(1):57-62. |
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| Authors: | ZHAO Kaixuan ZHAO Jianfu CHEN Shuling DU Wangfang |
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| Institution: | 1.Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences, Beijing 1001902.School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044 |
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| 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 quasi-equilibrium 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 tim... |
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| Keywords: | Flashing Freezing Droplet |
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