Hypersonic separation simulation of aerocraft similar to X-43A

ZHAO Fei; LIU Liling; SHI Yong; ZUO Guang; WAN Qian; ZHANG Yujia

doi:10.7527/S1000-6893.2021.25171

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2022 , Vol. 43 >Issue 5: 125171 - 125171

DOI: https://doi.org/10.7527/S1000-6893.2021.25171

Fluid Mechanics and Flight Mechanics

Hypersonic separation simulation of aerocraft similar to X-43A

ZHAO Fei ,
LIU Liling ,
SHI Yong ,
ZUO Guang ,
WAN Qian ,
ZHANG Yujia

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1. Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, China;
2. School of Mechanical Electronic & Information Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China

Received date: 2020-12-28

Revised date: 2021-01-12

Online published: 2021-02-02

Supported by

National Natural Science Foundation of China (11802015,41806209)

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Abstract

Stage separation process widely exists in the military and aerospace applications of hypersonic aerocraft. To further understand the aerodynamic interference and parameter effects in the process, an aerocraft similar to X-43A is chosen as the research object, and the simulation method of mesh deformation/local grid reconstruction adopted. The typical flow field structure, particularly the interstage interference between the aerocraft and the assistor, during the separation process is analysed. Additionally, the influences of the initial angle of attack and ejection force on the axial and normal relative distance, aerodynamic force and the angle of attack during the separation process are emphatically discussed. The results show that the interstage separation process is disturbed by the vortex and shock waves. The angle of attack has a large effect on the relative distance between the aerocraft and the assistor, and a small or negative angle of attack is more helpful for the safe separation. The ejection force has a significant influence on the axial relative distance, and a larger ejection force enables faster separation of the aerocraft from the interstage interference zone to reach a safe separation distance.

Key words： aerocraft similar to X-43A; hypersonic separation; mesh deformation; local grid reconstruction; aerodynamic interference

Cite this article

ZHAO Fei , LIU Liling , SHI Yong , ZUO Guang , WAN Qian , ZHANG Yujia . Hypersonic separation simulation of aerocraft similar to X-43A[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022 , 43(5) : 125171 -125171 . DOI: 10.7527/S1000-6893.2021.25171

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