不同长径比高压声腔中的脉冲激励实验研究

李霁; 石保禄; 唐勇; 李涛; 李军伟; 李新艳; 王宁飞

doi:10.12382/bgxb.2025.0674

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不同长径比高压声腔中的脉冲激励实验研究

更新时间：2026-05-06

- 不同长径比高压声腔中的脉冲激励实验研究
- Research on Pulse Excitation in High-pressure Acoustic Chambers with Different Length-to-diameter Ratios
- 兵工学报 2026年47卷第4期页码：250674
- 作者机构：
  
  北京理工大学空天科学与技术学院，北京 100081
  北京理工大学重庆创新中心，重庆 401120
  北京理工大学（珠海）, 广东珠海 519088
  辽宁北方华丰特种化工有限公司，辽宁抚顺 113003
- 作者简介：
  
  通信作者邮箱：tangyong@bit.edu.cn
- 基金信息：
  
  国防基础科研计划资助项目(JCKY2023203C013)
- DOI：10.12382/bgxb.2025.0674
  中图分类号： TK49
- 收稿：2025-07-21，
  
  网络首发：2026-02-10，
  
  纸质出版：2026-04
- 稿件说明：
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李霁, 石保禄, 唐勇, 等. 不同长径比高压声腔中的脉冲激励实验研究[J]. 兵工学报, 2026,47(4):250674.

LI Ji, SHI Baolu, TANG Yong, et al. Research on Pulse Excitation in High-pressure Acoustic Chambers with Different Length-to-diameter Ratios[J]. Acta Armamentarii, 2026, 47(4): 250674.
李霁, 石保禄, 唐勇, 等. 不同长径比高压声腔中的脉冲激励实验研究[J]. 兵工学报, 2026,47(4):250674. DOI： 10.12382/bgxb.2025.0674.

LI Ji, SHI Baolu, TANG Yong, et al. Research on Pulse Excitation in High-pressure Acoustic Chambers with Different Length-to-diameter Ratios[J]. Acta Armamentarii, 2026, 47(4): 250674. DOI： 10.12382/bgxb.2025.0674.

摘要

面向火箭发动机动态燃烧稳定性评定实验需求，设计了火药脉冲枪，研究脉冲激励下高压声腔的声学响应特性。在10MPa背压下对长径比0.6～5.1之间的5种声腔开展了轴向和径向脉冲激励实验，基于理想激波管理论建立初始激波幅值预测方法，并研究激励方向和声腔长径比对冲击幅值、声腔特征频率和1阶纵向模态（1L）衰减系数等的影响规律。研究结果表明：脉冲枪在10MPa背压下最高产生了1.63MPa的冲击幅值，且冲击幅值与声腔长径比相关；随着声腔长径比的减小，脉冲激励引起的主导振荡模式从纵向模态转变为切向和高频叠加模态；发展了基于互相关分析和能量守恒的两种平均声速识别和预估方法，并由反推出的温度计算了理论特征频率，与实验值偏差最大为6.24%；不同激励方向下1L衰减系数偏差不超过8.8%，轴向激励实验的1L衰减系数与每个声腔的1L特征频率近似呈线性关系。

Abstract

For the dynamic combustion stability assessment of rocket engines

a pulse gun is developed to investigate the acoustic response characteristics of high-pressure acoustic chamber under pulse excitation. Axial and radial pulse excitation experiments are conducted on five acoustic chambers (

L/D

ratios:0.6-5.1) under 10MPa back pressure. A prediction method for initial shock wave amplitude is established based on the theory of ideal shock tube. The effects of exci

tation direction and chamber

L/D

ratio on the shock amplitude

the eigenfrequency of acoustic chamber and the attenuation coefficient of the first-order longitudinal (1L) mode are also analyzed. The pulse gun produces a maximum shock amplitude of 1.63MPa under 10MPa back pressure

which is correlated with chamber

L/D

ratio. As the

L/D

ratio decreases

the dominant oscillation mode transitions from longitudinal mode to tangential and highfrequency superposition mode. Two average sound speed estimation methods are developed based on cross correlation analysis and energy conservation. The theoretical eigenfrequencies calculated from reversederived temperatures deviate by up to 6.24% from experimental values. The attenuation coefficient (

) deviations of 1L mode under different excitation directions are less than 8.8%

and

demonstrates a linear correlation with 1L eigenfrequency.

关键词

Keywords

references

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