基于木星大气环境的降落伞系统气动特性研究

木星探测是未来行星探测的重要发展方向，而降落伞是进入木星大气探测必不可少的气动减速装置。文章基于“伽利略号”探测任务，设计了满足未来木星探测需求的降落伞系统简化模型，并针对该降落伞系统进行了数值模拟，研究了木星大气和地球风洞实验环境中不同来流马赫数下降落伞系统的复杂流动现象及气动力变化规律。在木星大气环境中，降落伞的阻力系数和横向力系数大小以及横向力系数波动幅度均高于风洞试验环境，阻力系数波动幅度均低于风洞实验环境。此外，还研究了木星大气环境中不同来流攻角下降落伞系统的气动特性。研究表明，木星大气环境中降落伞系统气动特性与风洞实验结果有差异，因此未来在设计用于木星探测的降落伞系统时，应考虑由于木星大气环境对降落伞系统气动特性的影响。

Study on the Aerodynamic Performances of Parachute System Based on the Jupiter's Atmospheres

Jupiter exploration isan important development direction of the planetary exploration in future. Parachute is an essential deceleration device for entering Jupiter atmosphereexploration. Based on the Galileo exploration mission, the parachute system is designed to meet the future exploration requirement of Jupiter, and is further numerically simulated to investigate the complex flow phenomenon and aerodynamic performance of the parachute system at different freestream Mach numbers under Jupiter's atmospheric and wind tunnel test conditions. As a result, it is found that in Jupiter's atmosphere the drag coefficient and lateral force coefficient of the parachute as well as the fluctuation amplitude of the lateral force coefficient are higher than those of the wind tunnel test environment, and the fluctuation amplitude of the drag coefficient is lower than that of the wind tunnel test environment. In addition, the aerodynamic performances of the parachute system at different angles of attack in the atmosphere of Jupiter are also studied. The research shows that the aerodynamic performances of the parachute system under Jupiter's atmospheric environment are different from the wind tunnel test results. Therefore, when designing the parachute system for Jupiter exploration in the future, the impact of Jupiter's atmospheric environment on the aerodynamic performances of the parachute system should be considered.