摘要
为准确进行热设计,对倾斜轨道快速旋转高频箱的外热流进行了研究。首先采用与太阳同步轨道卫星对比的方法研究了倾斜轨道卫星太阳光照角度的变化特点及热分析极端外热流工况与太阳光照角度的关系。然后理论推导了快速旋转高频箱各舱板轨道外热流的理论计算公式。最后定量分析了高频箱舱外大尺寸天线反射器对高频箱外热流的影响。研究表明倾斜轨道卫星高频箱外热流随β角的变化存在拐点,高频箱热分析的极端外热流出现在拐点处。快速旋转使得高频箱各舱板的外热流均匀化,但整个高频箱的到达外热流较静止高频箱增大,差值可达到数百瓦。舱外大尺寸天线反射器对高频箱的外热流影响较大,某环扫雷达反射器对高频箱散热面吸收太阳辐射热流密度的影响达到31.2 W/m^2;同时天线反射器辐射达到高频箱散热面的红外辐射热流数量可观,某微波辐射计天线反射器的红外辐射热流占散热面总外热流的48%。
To improve accuracy of thermal design,the external heat flux of fast spin HUB in inclined orbit is studied.Firstly the comparative studies of variation characteristics of the orbit beta angle and its relationship with extreme heat fluxes are carried out.Then the theoretic formulas of external heat fluxes of fast spin HUB are derived for inclined orbit satellite.At last the varieties of external heat fluxes induced by antenna reflectors in large scale are analyzed.Results show that there are inflection points between the total external heat flux and the inclined orbit beta angle and the extreme external fluxes occur at these inflection points.The incident heat fluxes of each deck are uniformed for fast spinning HUB,but its total amount becomes larger comparing with static HUB.External heat flux of HUB is severely affected by antenna reflector because of the infrared radiation and shade.The change of absorbed solar radiation heat flux for one loop scanning radar HUB can reach to 31.2 W/m 2.Amount of infrared radiation heat flux from antenna reflector to radiating surface of HUB is also considerable.Its proportion in the total external heat flux is 48%for one microradiameter.
作者
张小波
王耀霆
张建波
肖志伟
徐向阳
ZHANG Xiaobo;WANG YaoTing;ZHANG Jianbo;XIAO Zhiwei;XU Xiangyang(China Academy of Space Technology(Xi'an),Xi'an710000,China)
出处
《空间电子技术》
2019年第6期73-78,共6页
Space Electronic Technology
作者简介
张小波(1985—),男,博士。研究方向为星载天线热设计与热分析。E-mail:zhangyangbo11803@163.com。
