相变储热/辐射器式热沉的传热特性研究

对一种用于舱外活动的相变储热/辐射器式热沉进行了实验研究和数值模拟.设计了相变储热器的实验件和实验方案,进行了储热器的冷却实验.建立了具有导热与对流换热耦合边界的相变储热器数学模型,模型中考虑了自然对流及空穴的影响.编制了相变储热器的性能分析计算程序.通过实验值与计算值的比较分析,验证了程序的可靠性.该模型及计算程序为相变储热器的设计和优化提供了有利的分析工具.

Study of the Heat Transfer Characteristics of Phase-of-change Thermal Storage/Radiation Heat Sink

Performance studies of a phase change thermal storage/radiation heat sink for extravehicular activity have been undertaken by experimental investigation and numerical simulation. The test specimens of phase change thermal storage were designed and the cooling tests of phase change thermal storage were conducted. The mathematical model of phase change thermal storage with coupled convection and conduction boundary conditions has been established. The effects of convective heat transfer and voids are considered in this model. A computational program has been developed for evaluating the performance of phase change thermal storage. The reliability of the program has been verified based on the experimental results. This program is a useful analysis tool for the design and optimization for a phase change thermal storage.