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

在去年工作延期2个月的情况下，在以往可视化试验的基础上，对多蒸发器环路热管（MLHP）的冷凝现象进行了研究。用几种预测缩聚现象的数学模型对MLHP的缩聚行为进行了验证。研究了传热系数、过热蒸汽区、两相流区和过冷液体区长度。这一工作将为未来航天器上MLHP冷凝器的优化设计提供理论依据。在确认了MLHP的冷凝行为后，申请人利用这些知识改进了不同领域的传热技术。在空间应用方面，申请人设计了低温环路热管（CLHP），用于在低温温度范围内工作的冷却机器。研制了工作流体为氮气的CLHP，工作温度范围为80 ~ 110 K，传热能力大于10 W，传热距离为2 m。今后还将进行示范试验。在地面使用中，申请人设计了两相机械泵送流体回路系统。设计了一种可对不同热源进行冷却的两相机械泵送流体回路系统，用于未来大容量产热系统（如电动飞机）的冷却。本研究成果将总结为期刊文章和会议论文。

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.