倾斜轨道卫星极端外热流分析  

Analysis of Satellite's Extreme Heat Flow in Inclined Orbit

作　　者：张好[1] 曹建光[1] 王江[1] 曾凡健 ZHANG Hao;CAO Jianguang;WANG Jiang;ZENG Fanjian(Shanghai Institute of Satellite Engineering,Shanghai 201109)

机构地区：[1]上海卫星工程研究所,上海201109

出　　处：《上海航天》2018年第1期36-42,共7页Aerospace Shanghai

基　　金：国家863计划(2014AA8073034);上海市科委启明星课题(14QB1404200)

摘　　要：倾斜轨道卫星外热流变化复杂,使整星的热控系统设计难度增加。从卫星极端外热流的角度出发,建立倾斜圆轨道卫星外热流随光照角和太阳辐射强度变化的解析模型,理论与仿真的对比结果验证了计算模型的准确性。分析计算时间单位对解析模型准确性的影响,总结卫星轨道高度和轨道倾角不同时极端外热流的变化规律。结果表明:轨道倾角相同时,卫星极端最大外热流和最小外热流均随轨道高度增加逐渐减少;轨道高度相同时,卫星最大外热流随轨道倾角的增加逐渐增大然后平稳波动,而最小外热流随轨道倾角的增加几乎不变;到达极端外热流的时间是轨道倾角和高度的复杂函数,处于波动状态。分析倾斜轨道卫星外热流的变化规律,有助于快速找到相对轨道的极端外热流,节省仿真计算时间,为确定卫星极端工况提供帮助。The extreme heat flow of inclined orbit satellites is complex,which increases the difficulty of thermal control system design.To calculate the extreme heat flow of the inclined-circular-orbit satellite,an analytical model that the heat flow varied with the beta angle and solar radiation is established.Based on the approach of numerical simulation and theoretical calculation,the influence of calculation time step on the accuracy of the model and the change rule of the extreme heat flow on the condition of different orbit altitudes and inclination angles are studied.The results show that on the condition of the same orbit inclination angle,the satellite’s extreme maximum and minimum heat flows decline with the increase of the orbit altitude.And under the same orbit altitude,the extreme maximum heat flow of the satellite increases slowly and then keeps balance while the extreme minimum heat flow almost remains unchanged.At the same time,the time when the satellite gets the extreme heat flow is a complex function of orbit inclination angle and altitude,and it fluctuates.The results can help to find the extreme heat flow in particular orbit quickly,as it can help to find the extreme condition of satellite.

关 键 词：卫星极端外热流 解析模型 光照角 太阳辐射 轨道高度 轨道倾角 时间步长 散热面 

分 类 号：V416[航空宇航科学与技术—航空宇航推进理论与工程]