红外与激光工程, 2019, 48 (12): 1214001, 网络出版: 2020-02-11   

超大口径在轨组装红外望远镜遮阳罩热设计

Thermal design of ultra-large diameter in-orbit assembly infrared telescope sunshield
作者单位
1 中国科学院长春光学精密机械与物理研究所, 吉林 长春 130033
2 中国科学院大学, 北京 100049
摘要
超大口径在轨组装红外望远镜体积大、工作温度低, 各组装模块间存在相互干扰, 传统热控手段不能完全满足其热控需求。为达到热控指标, 分析、利用日地-L2点轨道外部热环境特性, 设计了一个面向超大口径在轨组装红外望远镜的五层遮阳罩。使用UG软件建立了该望远镜有限元模型, 并进行了仿真分析。结果显示: 来自太阳的1 296 W/m2的热辐射经过遮阳罩的遮挡后, 到达低温区的辐射强度降低到0.036 W/m2, 望远镜在遮阳罩展开后约210天时通过辐射被动制冷降温至50 K以下, 满足热控需求。该设计为未来我国建造超大口径空间望远镜进行了热控技术探索, 具有一定的参考价值。
Abstract
Due to the large size and low operating temperature of the ultra-large diameter in-orbit assembly infrared telescope, mutual interference between assembly modules, the traditional thermal control methods cannot fully meet its requirements. In order to meet the proposed thermal design index, the external thermal environment analysis of the SE-L2 orbit was completed, and a five-layer sunshield for the ultra-large diameter in-orbit assembly infrared telescope was designed. The telescope finite element model was established and then simulated with the UG software. The simulation results show that after being shaded by the sunshield, the intensity of the thermal radiation from the sun, which is 1 296 W/m2, reduces to 0.036 W/m2 when it reaches the low temperature area. 210 days after the sunshield is unfolded, the temperature of this kind of telescope reduces to less than 50 K, through passive cooling radiation, meeting the demand of thermal control. This design is a valuable reference on the Chinese future construction of ultra-large space telescope because of the research on its thermal control.

王洪亮, 郭亮, 熊琰, 许博谦, 于夫男, 高燕, 石启龙. 超大口径在轨组装红外望远镜遮阳罩热设计[J]. 红外与激光工程, 2019, 48(12): 1214001. Wang Hongliang, Guo Liang, Xiong Yan, Xu Boqian, Yu Funan, Gao Yan, Shi Qilong. Thermal design of ultra-large diameter in-orbit assembly infrared telescope sunshield[J]. Infrared and Laser Engineering, 2019, 48(12): 1214001.

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