Effect of Martian atmosphere on aerodynamic performance of supersonic parachute two-body systems  

作　　者：Xiaopeng XUE He JIA Wei RONG Qi WANG Chih-yung WEN 

机构地区：[1]School of Aeronautics and Astronautics,Central South University,Changsha 410083,China [2]Beijing Institute of Space Mechanics and Electricity,Beijing 100094,China [3]Department of Mechanical Engineering,The Hong Kong Polytechnic University,Hong Kong,China

出　　处：《Chinese Journal of Aeronautics》2022年第4期45-54,共10页中国航空学报（英文版）

基　　金：co-supported by the National Natural Science Foundation of China(Nos.11702332 and 12072377);the Natural Science Foundation of Hunan Province,China(No.2018JJ3627)。

摘　　要：Supersonic flows around parachute two-body systems are numerically investigated by solving the compressible Navier-Stokes equations. In the present study, both rigid and flexible parachute models are considered, which comprise a capsule and a canopy. The objective of the present study is to investigate the effects of the Martian atmosphere on the unsteady flows produced by these parachute two-body models and the structural behavior of the flexible canopy. It was found that in the Martian atmosphere, the supersonic rigid parachutes with shorter trailing distances exhibited weaker aerodynamic interactions between the capsule wake and canopy shock, resulting in a smaller pressure distribution on the typical surfaces of the canopy. By contrast, because the flow modes around the flexible parachute in the Martian atmosphere were similar to those of the rigid parachute under the air conditions of the wind tunnel tests, the canopy shape was almost unchanged. When a new canopy material was designed by decreasing the Young’s modulus and damping coefficient, an area oscillation phenomenon was observed in the flexible parachute with a trailing distance of 10 in the Martian atmosphere. Consequently, the Martian atmosphere(low density and pressure) has a significant effect on the aerodynamic performance of the flexible parachute system.

关 键 词：Canopy flexibility Fluid structure interaction Martian atmosphere Supersonic parachute Unsteady flow 

分 类 号：V411[航空宇航科学与技术—航空宇航推进理论与工程]