考虑轨道摄动的外热流计算分析

为改进传统外热流算法未考虑外热流经多次反射后的吸收和国外商业软件未考虑轨道摄动及太阳矢量变化对外热流的影响等不足,重新定义了外热流角系数和外热流辐射传递因子,综合SGP4轨道模型和Gebhart方法,给出了考虑摄动等因素的辐射传递因子和轨道外热流计算模型,以及相应的计算流程。通过仿真分析论证了考虑多次反射及摄动等因素的重要性。

Numerical Computation and Analysis of External Heat Flux Considering Perturbation and Other Factors

To solve the shortcomings that the absorption of the external heat flux after multiple reflections was not considered in conventional method and the variation of solar vector was not considered in commercial software, the angle factor of external heat flux was redefined and the concept of radiative exchange factor of external heat flux was introduced in this paper. The algorithm for external heat flux considering perturbation and other factors was provided by means of radiative exchange factor gained through Gebhart theory combined with SGP4 model. The simulation results showed that it was of vital importance to consider perturbation, variation of solar vector and multiple reflections using radiative exchange factor.