Thermal analysis for exposed photoelectric instrument on satellite

Node-net/finite volume method was combined with Monte Carlo method to solve transient temperature field for photoelectric instrument on satellite. The coupled equations have included a source item consisted of external heat flux and internal heat source, as well as analyzed the conduction and radiation effect. A governing function facilitated whether the satellite operating or non-working state. Dummy surface method not only avoided the difficulty from computing temperature filed in opened system, but also made effort when the ray of light is barrier or multi-reflected. The numerical simulation results show that the temperature filed of component varies obviously if the optical characteristics of reflectors are changed, such as the surface of the reflector is known as direction reflection or scattered reflection.