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曲普(1979—), 男, 副教授, 博士。E-mail: qupunuc@nuc.edu.cn |
收稿日期: 2024-09-06
网络出版日期: 2025-05-15
基金资助
智元实验室基金(ZYL2024015)
Investigations on Effects of Multi-angle Inclined Impact of Gas Jet on Launching Platform
Received date: 2024-09-06
Online published: 2025-05-15
针对火箭弹发射时产生的燃气射流对发射系统造成较强冲击, 可能对发射系统造成较大损害问题, 以不同高低射角下火箭弹尾流场为研究对象, 基于计算流体动力学方法, 采用有限体积法进行数值离散, 建立不同高低射角尾流场数学物理模型。在高低射角调整范围内, 选择0°、5°、15°、28°、38°五种角度进行仿真模拟。通过分析射流速度和压力等参数分布随射角及时间变化, 得到不同射角下射流发展规律;通过分析壁面压强分布及最大压强变化情况, 得到不同射角下射流对发射平台冲击效应变化规律。研究结果表明:随射角增大, 壁面压强整体有升高趋势;射角大于15°后, 壁面压强会有较大提高幅度;发射平台各位置受射流冲击影响程度不同, 需采用不同防护策略。本研究为发射平台防护设计提供了理论支撑。
曲普 , 陈光辉 , 袁伟亮 , 梁兴旺 , 姜瑞洲 . 燃气射流多角度倾斜冲击发射平台效应研究[J]. 弹箭与制导学报, 2025 , 45(2) : 223 -231 . DOI: 10.15892/j.cnki.djzdxb.2025.02.013
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
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