Investigations on Effects of Multi-angle Inclined Impact of Gas Jet on Launching Platform

QU Pu; CHEN Guanghui; YUAN Weiliang; LIANG Xingwang; JIANG Ruizhou

doi:10.15892/j.cnki.djzdxb.2025.02.013

Journal of Projectiles, Rockets, Missiles and Guidance >

2025 , Vol. 45 >Issue 2: 223 - 231

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2025.02.013

Investigations on Effects of Multi-angle Inclined Impact of Gas Jet on Launching Platform

QU Pu ^,¹ ,
CHEN Guanghui ² ,
YUAN Weiliang ² ,
LIANG Xingwang ² ,
JIANG Ruizhou ¹

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¹ School of Mechanical and Electrical Engineering, North University of China, Taiyuan 030051, Shanxi, China
² China North Vehicle Research Institute, Beijing 100072, China

Received date: 2024-09-06

Online published: 2025-05-15

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Abstract

The gas jet generated during rocket launching has a strong impact on the launching platform and may cause great damage to the launching platform. Therefore, it is necessary to study the impact effect of gas jet, researching the the wake field of rocket under different elevation angles. Based on computational fluid dynamics method, a finite volume method is used to discrete the rocket wake fields, and mathematical physical models of wake fields at different elevation angles are established for numerical simulation. Within the range of high and low angle adjustment, five angles of 0°, 5°, 15°, 28° and 38° are selected for simulation. By analyzing the distribution of jet velocity and pressure with the change of elevation angles and time, the development law of jet under different elevation angles can be obtained. Based on the analysis of the wall pressure distribution and maximum pressure variation, the impact effect of jet on the launching platform under different elevation angles can be obtained. The research results show that the wall pressure tends to increase with the increase of the elevation angle. And when the elevation angle is greater than 15°, the wall pressure will increase greatly. Each position of the launch platform is affected by jet impact to different degrees, and different protection strategies need to be adopted. The research provides theoretical support for the launch platform protection design.

Key words： elevation angle; wake field; impact effect; wall pressure; numerical simulation

Cite this article

QU Pu , CHEN Guanghui , YUAN Weiliang , LIANG Xingwang , JIANG Ruizhou . Investigations on Effects of Multi-angle Inclined Impact of Gas Jet on Launching Platform[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2025 , 45(2) : 223 -231 . DOI: 10.15892/j.cnki.djzdxb.2025.02.013

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