| Experimental investigation of drop evaporation in microgravity onboard Chinese Satellite SJ10 | |
Liu QS(刘秋生) ; Xu GF(徐国峰); Zhu ZQ(朱志强); Liu WJ(刘文军); Zhao DD(赵冬冬); Jie JC(解京昌); Lin H(林海)
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| Source Publication | Proceedings of the International Astronautical Congress, IAC |
| 2019 | |
| Conference Name | 70th International Astronautical Congress, IAC 2019 |
| Conference Date | October 21, 2019 - October 25, 2019 |
| Conference Place | Washington, DC, United states |
| Abstract | The space experiments EFILE (Evaporation and Fluid InterfaciaL Effects) of sessile drop evaporation process were performed onboard the Chinese Scientific Satellite SJ10. The space experimental facility of drop evaporation and convection consist of a pair of drop evaporation test units, including two different heating substrates, two optical observation modules (CCD + back light), two liquid injection modules, two substrate sealing modules and environment monitor module (Fans + pressure measurement sensors), electronic control module. Both copper substrate and PTFE substrate were used as drop evaporating plates at which heating temperature can be controlled from 30-50?. Test liquid is pure ethanol. In orbit experiment process, the shapes of sessile droplet (volume and contact angle) have been recorded, and the heating temperature on the substrates, the heat flux between liquid drop and substrate and the pressure and humidity of air environment inside the set-up box, were measured and download on the earth. The duration of total experiments on orbit is about 25 hours in which 24 times of drop evaporations were carried out successfully on both PTFE and copper substrates respectively, for different heating temperature at the substrate and different injected volumes of drop. The largest sessile droplets with a diameter more than 10mm were created by injecting on the substrates in space. The variations of average evaporating rate of droplet for different heating temperature and drop volumes were obtained in space and compared to the ground-based experimental results. The space experimental results show that the evaporation of liquid drop can be separated evidently into 3 stages and in microgravity condition, larger droplets are easy to be formed and the evaporating lifetime become evidently longer than that on the ground. Copyright © 2019 by the International Astronautical Federation (IAF). All rights reserved. |
| Keyword | Droplet evaporation Marangoni effect Microgravity Phase change Recoverable satellite Space experiment |
| Indexed By | EI |
| Language | 英语 |
| Document Type | 会议论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/85102 |
| Collection | 微重力重点实验室 |
| Affiliation | 1.Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China 2.University of Chinese Academy of Sciences, Beijing, 100049, China |
| Recommended Citation GB/T 7714 | Liu QS,Xu GF,Zhu ZQ,et al. Experimental investigation of drop evaporation in microgravity onboard Chinese Satellite SJ10[C]Proceedings of the International Astronautical Congress, IAC,2019. |
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