摘要
为了优化多辐射器航天器热控流体回路布局,提高流体回路的散热效率,降低流体回路温度,本文基于(火积)理论,分别对多个辐射器串联和并联的流体回路布局的散热进行了分析。结果表明,排散相同热量时,流体回路的流体与管路壁面之间的温差均匀性越好,流体回路散热过程(火积)耗散越小,系统散热过程越优。进一步,对于2个辐射器的情况,分别对辐射器设置了不同的空间辐射加热热流,对辐射器的流体回路布局方式进行了比较。结果表明,辐射器与流体回路串联时,系统散热性能要优于两者并联,系统的流体温度水平最低,结果与(火积)理论分析的预测完全一致。研究结论对多辐射器的航天器热控流体回路设计具有指导意义。
In order to optimize the layout of the spacecraft thermal control fluid loop with multiple radiators, improve the heat dissipation efficiency of the fluid loop, and reduce the fluid loop temperature, based on entranspy dissipation theory, this paper analyzes the heat-dissipation process of the fluid loop layout in series and in parallel with multiple radiators. The results show that when the same amount of heat is dissipated, the uniformity of the temperature difference between the fluid and the wall of the pipeline is better, and the smaller the entranspy dissipation of the heat dissipation process of the fluid loop is, the better the cooling process of the system is. Further, for the case of two radiators, the radiators are respectively provided with different space heat fluxes, and the radiators are compared with different fluid loop layout patterns. The results show that when the radiators are connected in series with the fluid loop, the heat dissipation performance of the system is better than the parallel connection of the radiators and the fluid loop. At the same time the fluid temperature level of the system is the lowest. The result is completely consistent with the prediction of the entranspy theory. The conclusion of the study has guiding significance for the design of the spacecraft thermal control fluid loop with multiple radiators.
作者
刘欣
梁新刚
LIU Xin;LIANG Xin-gang(School of Aerospace,Tsinghua University,Beijing 100093,China;China Academy of Launch Vehicle Technology,Beijing 100076,China)
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2019年第2期231-238,共8页
Journal of Astronautics
关键词
航天器
热控
流体回路
(火积)耗散
优化
Spacecraft
Thermal control
Fluid loop
Entranspy dissipation
Optimization
