载人运输飞船多模式和姿态的外热流

External Heat Flux on Manned Transport Spacecraft with Multiple Modes and Attitudes

在理论分析的基础上,建立了飞船外热流分析模型,解算出不同飞行姿态和模式下的外热流,分析得到外热流变化规律,得出极端外热流工况。分析结果表明:当姿态为三轴稳定时,外热流随受晒因子增大而增加;由三轴稳定转为偏航机动后外热流突然减小,且随受晒因子增大而减小。

External heat flux analysis is not only the foundation of thermal control design and thermal analysis, but also the significant thermal boundary condition for ground thermal test. Based on theoretical analysis, a spacecraft external heat flux model was developed and the heat flux was calculated in different flight modes and attitudes. In addition, the heat flux characteristics was obtained in the extreme case. The results show that heat flux increases with the augmentation of percent time in sunlight when the spacecraft is in three-axis stabilized attitude, but decreases abruptly when it turns into the yaw maneuver, and then the heat flux will decrease with the augmentation of percent time in sunlight reversely.