碱金属热管传热特性的数值研究
Numerical Investigation on Heat Transfer Characteristics of Alkali Metal Heat Pipe
DOI: 10.12677/NST.2022.101002, PDF,  被引量    国家自然科学基金支持
作者: 吴应杰, 童彦钧, 赵后剑, 牛风雷：华北电力大学，非能动核能安全技术北京重点实验室，北京
关键词: 高温热管；VOF模型；多孔介质；毛细力；High Temperature Heat Pipe； VOF Model； Porous Media； Capillary Force
摘要: 碱金属热管以良好的传热性能被广泛应用于航天和核工等领域。含有吸液芯的碱金属热管的工作过程涉及高温环境下的相变和多孔介质流动等复杂物理现象。本文采用多孔介质模型和VOF模型对碱金属热管的工作过程进行数值模拟。采用用户自定义文件(UDF)编译蒸发–冷凝相变模型和毛细力模型。通过与前人实验数据进行对比验证了本模型的准确性。利用该模型分析了孔隙率和热流密度等参数对碱金属热管传热性能的影响。相同孔隙率下，热管的有效热阻随着热流密度的增大而减小。当热流密度相同时，热管的有效热阻随着孔隙率的增大而增加。
Abstract: With good heat transfer performances, alkali metal heat pipes are widely used in astronautics and nuclear engineering industries. Heat transfer of wicked heat pipe is related to processes of phase changes and porous medium flow with high operating temperature. In the current investigation, heat transfer of alkali metal heat pipe is simulated with porous media assumption and VOF model. The capillary force and the phase change process are compiled by User Defined Function (UDF). The numerical model is validated by experimental data in the literature. Based on the numerical model, heat flux effects and porosity effects on heat transfer performances of heat pipes are analyzed. With the same porosity, the effective thermal resistance is decreased with the increasing of heat flux. With the same heat flux, the effective thermal resistance is increased with the increasing of porosi-ty.
文章引用：吴应杰, 童彦钧, 赵后剑, 牛风雷. 碱金属热管传热特性的数值研究[J]. 核科学与技术, 2022, 10(1): 9-19. https://doi.org/10.12677/NST.2022.101002

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