热挡板设计参数对涡声耦合压力振荡影响研究

赵小锋; 孙兵兵; 李军强

doi:10.15892/j.cnki.djzdxb.2019.03.036

弹箭与制导学报 >

2019 , Vol. 39 >Issue 3: 163 - 167

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2019.03.036

热挡板设计参数对涡声耦合压力振荡影响研究

赵小锋 ,
孙兵兵 ,
李军强

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1 海军装备部, 北京 100000
2 西安近代化学研究所, 西安 710065

赵小锋(1982-),男,山东淄博人,高级工程师,研究方向:海军装备质量与技术管理。

收稿日期: 2019-04-09

网络出版日期: 2025-05-20

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Study on the Influence of Thermal Baffle Design Parameters on Vortex Acoustic Coupled Pressure Oscillation

ZHAO Xiaofeng ,
SUN Bingbing ,
LI Junqiang

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1 Naval Equipment Department, Beijing 100000, China
2 Xi'an Modern Chemistry Research Institute, Xi'an 710065, China

Received date: 2019-04-09

Online published: 2025-05-20

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摘要

为探索热挡板设计参数对涡声耦合效应引起的压力振荡特性的影响,基于阿丽亚娜5型运载火箭发动机的缩比模型,利用大涡模拟方法开展了数值研究。首先研究了热挡板高度对发动机内的压力振荡的影响,结果发现,随着热挡板高度的增加,压力振荡幅度逐渐变大;合理的设计热挡板高度可以减小涡声耦合引起的压力振荡。在此基础上,研究了热挡板弯曲角度对涡声耦合压力振荡的影响,发现随着热挡板弯曲角度的增大,压力振荡的不稳定模态从高模态向低模态转移,且振荡现象逐渐从单一频率下剧烈的振荡向多频率振荡分散,降低了最大压力振荡幅度,在一定程度上降低了压力振荡的危害。

关键词： 压力振荡; 涡声耦合; 热挡板高度; 弯曲角度

本文引用格式

赵小锋 , 孙兵兵 , 李军强 . 热挡板设计参数对涡声耦合压力振荡影响研究[J]. 弹箭与制导学报, 2019 , 39(3) : 163 -167 . DOI: 10.15892/j.cnki.djzdxb.2019.03.036

Abstract

In order to explore the influence of thermal baffle design parameters on the pressure oscillation characteristics caused by the vortex coupling effect, a numerical study was carried out based on the reduction model of the Ariane 5 launch vehicle engine. Firstly, the influence of the thermal baffle height on the pressure oscillation in the engine was studied. The results showed that the amplitude of the pressure oscillation increased gradually with the increase of the height of the thermal baffle. A reasonable design of thermal baffle height could reduce the pressure oscillation caused by vortex coupling. On this basis, the influence of the bending angle of the thermal baffle on the vortex coupled pressure oscillation was also studied, and it was found that the unstable mode of the pressure oscillation shifted from high mode to low mode with the increase of the bending angle of the thermal baffle. And the oscillation phenomenon gradually dispersed from the violent oscillation at a single frequency to the multi-frequency oscillation, reducing the maximum pressure oscillation range, which could reduce the damage of the pressure oscillation to a certain extent.

Key words： pressure oscillation; vortex-acoustic coupling; thermal baffle height; bending angle

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