大气制动期间探测器的气动特性和轨道计算

以NASA火星全球勘测（MGS）号探测器作为大气制动计算模型，应用DSMC方法模拟了探测器在大气制动期间的稀薄气体动力学特性，分析了不同来流密度情况下探测器的流场特性、气动特性的变化情况以及气体动力学系数的变化关系．并提出了气动力-气动热-轨道一体化计算模型，利用DSMC模拟技术以及经典动力学理论对大气制动轨道变化进行了计算和分析．研究结果表明:行星大气密度、探测器俯仰角、偏航角的变化对探测器的气动特性有重要影响，计算结果与文献中的结果表现出很好的一致性；气动力-气动热-轨道一体化计算可以模拟大气制动过程，模拟所得到的大气制动轨迹反映出较好的制动效果．

Spacecraft Aerodynamics and Trajectory Simulation During Aerobraking

The direct simulation Monte Carlo method(DSMC) was used to simulate rarefied aerodynamic characteristics during the aerobraking process of NASA Mars Global Surveyor(MGS) spacecraft.The research focused on the flowfield and aerodynamic characteristics distribution under various freestream densities,and the variation regularity of aerodynamic coefficients was analyzed.Also,an aerodynamics-aeroheating-trajectory integrative simulation model was developed to preliminarily calculate the aerobraking orbit transfe...