航天器工程2023，Vol.32Issue(6)：123-129,7.DOI:10.3969/j.issn.1673-8748.2023.06.019
钠热管传热极限过渡数值模拟分析
Numerical Simulation Analysis of Heat Transfer Limit Transition in Sodium Heat Pipe
刘剑术 1牟玉鹏 1李小斌 1张红娜 1李凤臣 1韩冶 2王泽鸣 2柴宝华2
作者信息
- 1. 天津大学 先进内燃动力全国重点实验室,天津 300350||天津大学 机械工程学院,天津 300350
- 2. 中国原子能科学研究院,北京 102413
- 折叠
摘要
Abstract
Sodium heat pipes have a wide range of applications in the field of space nuclear power sources.A 2m long sodium heat pipe is taken as the research object in this paper,and the capillary force is described by introducing the momentum source term,and the phase change flow process in the sodium heat pipe is simulated when it encounters different heat transfer limit transitions.Sodium heat pipes are mainly affected by the viscosity limit,the sonic limit,the entrainment limit and the capillary limit within the main operating temperature range,therefore there are three transition points.The simulation analysis results show that there is no liquid agglomeration or va-por blockage in the evaporator section of the heat pipe during the transition between viscosity lim-it and the sonic limit.The vapor blockage and liquid entrainment phenomenon can occur as the sonic and entrainment limits are combined,along with the liquid accumulation.And when the en-trainment limit and capillary limit act together,the phenomenon is different from that when they appear separately.The research results of this paper can be used to gain a deeper understanding of the working mechanism and optimization design of sodium heat pipes,providing a scientific refer-ence for the more efficient design of space nuclear power systems.关键词
钠热管/毛细流动/传热极限/极限过渡/壁温波动Key words
sodium heat pipe/capillary flow/heat transfer limit/limit transition/wall tempera-ture fluctuation分类
能源科技引用本文复制引用
刘剑术,牟玉鹏,李小斌,张红娜,李凤臣,韩冶,王泽鸣,柴宝华..钠热管传热极限过渡数值模拟分析[J].航天器工程,2023,32(6):123-129,7.
