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撥水性多孔質を通過する凝縮流の素過程理解に基づくループヒートパイプ凝縮器の機能化

基于理解冷凝流穿过疏水多孔材料的基本过程的环路热管冷凝器的功能化

基本信息

批准号：
18J15506
负责人：
常新雨
金额：
$ 0.96万
依托单位：
Tohoku University (2019-2020)Nagoya University (2018)
依托单位国家：
日本
项目类别：
Grant-in-Aid for JSPS Fellows
财政年份：
2018
资助国家：
日本
起止时间：
2018-04-25 至 2021-03-31
项目状态：
已结题

项目摘要

In this year’s 2-month extension period for last year’s work, based on previous visualization tests, the condensation phenomena of multi-evaporator loop heat pipe (MLHP) were investigated. Several mathematical models for predicting the condensation phenomena were used to confirm the MLHP's condensation behavior. The heat transfer coefficient, the lengths of the superheated vapor region, two-phase flow region and the subcooled liquid region were studied. This work will contribute to the optimal design for MLHP's condenser used in future spacecraft. After confirming the MLHP's condensation behavior, the applicant used this knowledge to improve the heat transfer technology in different fields. In space use, the applicant designed the cryogenic loop heat pipe (CLHP) for cooling machines working in cryogenic temperature range. A CLHP was developed with the working fluid nitrogen, the operating temperature range of 80-110 K and more than 10 W heat transfer capability for 2 m heat transport distance. Demonstration tests will be conducted in the future. In ground use, the applicant designed the two-phase mechanically pumped fluid loop system. A two-phase mechanically pumped fluid loop system that can cooling different heat sources was designed for cooling the future large capacity heat generation system, such as the electric airplane. The achievements in this research will be summarized as journal articles and conference papers.

在去年工作的2个月延伸期内，在以往可视化实验的基础上，对多蒸发器环路热管的冷凝现象进行了研究。用几种预测凝结现象的数学模型来确定MLHP的凝结行为。对换热系数、过热汽区长度、两相流区长度和过冷液相区长度进行了研究。这项工作将有助于对未来航天器中使用的MLHP冷凝器进行优化设计。在确认了MLHP的冷凝行为后，申请人利用这一知识改进了不同领域的换热技术。在空间应用方面，申请人设计了用于工作在低温温度范围内的冷却机的低温回路热管(CLHP)。以工质氮气为工质，工作温度80~110K，换热能力大于10W，换热距离2m，研制了CLHP。未来将进行演示测试。在地面使用方面，申请人设计了两相机械泵送流体循环系统。为冷却电动飞机等未来大容量制热系统，设计了一种能够冷却不同热源的两相机械泵送流体循环系统。这项研究的成果将以期刊文章和会议论文的形式进行总结。