Numerical Study on Aerodynamic Performance of Mars Parachute Models with Geometric Porosities  

作　　者：Lulu Jiang He Jia Xin Xu Wei Rong Wei Jiang Qi Wang Gang Chen Xiaopeng Xue 

机构地区：[1]Central South University,Changsha 410083,China [2]Xi’an Jiaotong University,Xi’an 710049,China [3]Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China [4]Beijing Institute of Space Mechanics&Electricity,Beijing 100076,China

出　　处：《Space(Science & Technology)》2022年第1期338-350,共13页空间科学与技术（英文）

基　　金：This work was substantially supported by the National Natural Science Foundation of China(Grant No.12072377 and No.11702332);the Natural Science Foundation of Hunan Province,China(Grant No.2022JJ30678);This work was also partly supported by the Laboratory of Aerospace Entry,Descent and Landing Technology(Grant No.EDL19092126).

摘　　要：The supersonic flows around rigid parachute-like two-body configurations are numerically simulated at Mach number of 1.978 by solving three-dimensional compressible Navier-Stokes equations,where the two-body model consists of a capsule and a canopy,and a geometric structure(i.e.,gap)is located on the canopy surface.The objective of this study is to investigate the effects of gaps with different porosities and positions on the aerodynamic performance of supersonic parachute.The complicated periodic aerodynamic interactions between the capsule wake and canopy shock occur around these two-body models.From the formation of canopy shock and drag coefficient variation,the cycled flow structures can be divided into three types:(1)narrow wake period,(2)open wake period,and(3)middle wake period.In addition,it was found that the geometric gaps have no obvious influences on the flow modes.However,compared with models with different gap positions,the two-body model with an upper gap(gap is close to the canopy vent,UG model)has a smaller drag coefficient fluctuation and better lateral stability.On the other side,the increase of porosity has a more significant impact on UG models.

关 键 词：stability surface POSITIONS 

分 类 号：V47[航空宇航科学与技术—飞行器设计]