Calculation on External Heat Flux of a Space Camera

Abstract

In order to obtain accurate external heat flux data, the space system thermal simulation module in NX is used to solve the thermal analysis design problem on a camera in space flight section. The effects of different time, different seasons and different orbital altitude on the external heat flux of spacecraft surface are analyzed. The calculation results show that for different seasons and different orbital altitudes, the variation laws of external heat flux on the same surface are basically the same, and there are only differences in value. The differences are small, within 10 %; For the camera launched at different times of the day, the law of external heat flux changes is completely different, and difference in value is also very large. The heat flux in the area exposed to the sun is 6.38 times that of the heat flux in the shadow area. The results can be used to guide thermal design and calculate the temperature distribution of the camera. On the other hand, they provide reference for the design of other types of spacecraft with similar orbits.