摘要
大倾角近地圆轨道通信卫星外热流复杂多变,整星热耗大且对地面热流集中,因此其热控设计难度较大。本文以非箱式构型小卫星为对象,研究近地圆轨道通信卫星的热控技术。文中分析了大倾角近地圆轨道的外热流情况,各个舱板的外热流稳定性均较差,无法选取固定的散热面。本文提出了优化组合散热面并采用三维热管网络耦合散热面的热控技术,实现整星2200 W(对地面1500 W)的散热能力。文中利用热分析软件建立了整星的有限元模型,并对极端高低温工况进行了仿真分析,模拟结果表明上述热控技术可满足卫星散热需求。
The orbital thermal environment of the low earth orbit （LEO） commutation satellite with large inclination is complex, while the heat dissipation of the whole satellite and the heat flux on the earth deck are both great. Therefore, the thermal design is rather difllcult. The thermal control technology for the LEO commutation satellite with large heat dissipation and non-box configuration is studied in this paper. The extreme orbital heat flux of the LEO orbit with large inclination is investigated. The results show that the orbital heat flux of each panel is unstable and then no fixed heat rejection surface can be set. Considering the complex orbital environment and thermal control requirement of the satellite, the thermal design scheme, which is optimally combining certain heat rejection surfaces and coupling them with three-dimensional （3D） heat pipe network, is proposed and could make the heat dissipation capability of the whole-satellite reach 2200 W and that of the earth deck be 1500 W. In order to validate the design scheme, the thermal analysis is carried out. The finite element model of the whole-satellite is established and the worst hot and cold cases are modeled. The simulation results indicate that the thermal design scheme proposed in this paper meets the thermal control requirement of the large heat dissipation and operation temperature range.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2017年第6期1338-1343,共6页
Journal of Engineering Thermophysics
关键词
近地圆轨道通信卫星
外热流
热控技术
有限元分析
三维热管网络
LEO commutation satellite
orbital heat fluxes
thermal control technology
finite ele- ment analysis
3D heat pipe network
