北京航空航天大学学报 ›› 2009, Vol. 35 ›› Issue (3): 280-283.

• 论文 • 上一篇    下一篇

纳卫星微槽道冷却系统在轨动态热特性分析

刘 佳, 李运泽, 王 浚   

  1. 北京航空航天大学 航空科学与工程学院, 北京 100191
  • 收稿日期:2008-03-20 出版日期:2009-03-31 发布日期:2010-09-16
  • 作者简介:刘 佳(1983-),女,甘肃兰州人,博士生,liujia@ase.buaa.edu.cn.
  • 基金资助:

    国家自然科学基金资助项目(50506003)

Dynamical thermal analysis of microchannel cooling system for in-orbit nano-satellite

Liu Jia, Li Yunze, Wang Jun   

  1. School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2008-03-20 Online:2009-03-31 Published:2010-09-16

摘要: 针对纳卫星热流密度不断升高的发展趋势,介绍了一种基于微机电技术(MEMS,Micro Electro Mechanical Systems)的泵驱动单相流微槽道冷却系统.通过合理分析与简化,应用集总参数法建立了能够反映受控对象及冷却装置动态特性的温度响应模型;运用数值方法仿真计算了某纳卫星在轨飞行中受空间外热流影响下的外部散热面和内部电子设备温度的变化规律.仿真结果表明:应用MEMS技术的微槽道冷却系统可以满足高热流密度的纳卫星热系统的冷却需求;空间外热流相对于星体内部热功率的变化,对纳卫星散热面温度的影响较小;该建模方法和求解算法对分析计算纳卫星的温度动态特性是简便、合理的,并为进一步深入研究纳卫星热控制、热管理理论与技术奠定了理论研究及工程应用基础.

Abstract: Considering the continually rising tendency of the power densities of nano-satellite, MEMS (micro electro mechanical systems)based pumped liquid microchannel cooling system was introduced. Dynamical thermal response model for the temperature changes of both the controlled object and the cooling device was built up by means of the lumped parameter method with reasonable analysis and logical simplification. Based on the nanosatellite inorbit case, the variation rule of the internal electronic equipment and external radiator surfaces were performed by the numerical simulation and calculation. Simulation results indicate that MEMS based on the microchannel cooling system can satisfy the cooling requirements of nano satellite thermal system with high heat flux; the external space heat flux has less affect to the radiator of nano satellite compared with the internal equipment; the modeling methods and algorithm is convenient and reasonable not only for the dynamical temperature calculation and the analysis of nano satellite, but also for the developing of advanced nano-satellite thermal control and thermal management theories and technologies.

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