大气密度对降落伞充气性能的影响

尽管火星表面大气非常稀薄，但降落伞仍是火星探测着陆系统中一种重要的减速装置。文章建立了一个降落伞的充气动力学模型，并根据此模型研究了大气密度对降落伞充气性能的影响。结果表明：降落伞的充气时间和充气距离是随大气密度的减小而增大，同时，随着大气密度的减小，降落伞开始张开的速度变得非常缓慢。

The Effect of Atmospheric Density on Parachute Inflation Performances

Although the Martian atmosphere is very rare, a parachute is an important decelerator in the entry, descent and landing system for Mars exploration mission. A dynamic model of parachute inflation is presented, and the effect of atmospheric density on parachute inflation performances are studied on the basis of it. The results show that the parachute filling time and filling distance are increased as the atmospheric density is reduction, and the initial open velocity of the parachute becomes much slow with the reduction of the atmospheric density.