CFD-FASTRAN-based Simulation and Analysis of Small Launch Tube Shock Wave Opening Process

WANG Qifan; AN Chao; WEI Guangwei; QIN Huiguo

doi:10.15892/j.cnki.djzdxb.2025.02.010

Journal of Projectiles, Rockets, Missiles and Guidance >

2025 , Vol. 45 >Issue 2: 199 - 207

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2025.02.010

CFD-FASTRAN-based Simulation and Analysis of Small Launch Tube Shock Wave Opening Process

WANG Qifan ^,¹ ,
AN Chao ² ,
WEI Guangwei ¹ ,
QIN Huiguo ¹

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¹ Beijing Institute of Mechanical Equipment, Beijing 100854, China
² Office of the First Military Representative of the Air Force Equipment Department in Beijing, Beijing 100854, China

Received date: 2024-07-08

Online published: 2025-05-15

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Abstract

In order to study the hot launch shock wave opening process of small launcher, a numerical simulation of the process is carried out by using CFD-FASTRAN aerodynamic analysis software. According to the calculation results analysis, it gives the changing process of surface temperature and pressure of main components affects by gas shock wave in the process of hot launch shock wave opening of small launch tube. The whole process of hot launch shock cap opening is analyzed by using CFD-FASTRAN pneumatic analysis software innovatively, and the influence of the distance between nozzle and back cap and the expansion angle of nozzle on the shock cap opening process is systematically analyzed for the first time. The results show that the pressure decreases from edge to center and the temperature increases from edge to center under the influence of gas jet. The shock wave reflected by the gas flow moves along the axis of the launch tube towards the warhead, and the pressure and temperature on the wall of the launch tube gradually decrease with the direction of the shock wave. The temperature and pressure of the front cover are weakened from edge to center by the gas shock wave influence. The increase of the distance between the nozzle outlet and the rear cover and the increase of the expansion angle of the nozzle can enhance the total energy reflected by the shock wave to the front cover, and shorten the opening time of the shock wave. The calculation and simulation method can provide a reference for the strength design and structure design of the front and back covers of the small launch tube with hot launch shock wave.

Key words： CFD-FASTRAN; launch tube; shock wave; computational fluid; gas jet

Cite this article

WANG Qifan , AN Chao , WEI Guangwei , QIN Huiguo . CFD-FASTRAN-based Simulation and Analysis of Small Launch Tube Shock Wave Opening Process[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2025 , 45(2) : 199 -207 . DOI: 10.15892/j.cnki.djzdxb.2025.02.010

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