Effect of Detonation Instability and Initial Pressure on Track Angle of Spinning Detonation

Huanjuan ZHAO; Keqing LIU; Lei PANG; Jing LIU; Min LIN; Shiming DONG

doi:10.12382/bgxb.2021.0860

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Effect of Detonation Instability and Initial Pressure on Track Angle of Spinning Detonation

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- Effect of Detonation Instability and Initial Pressure on Track Angle of Spinning Detonation
- Acta Armamentarii Vol. 44, Issue 4, Pages: 1086-1096(2023)
- 作者机构：
  
  1. 北京科技大学土木与资源工程学院, 北京 100083
  2. 河南理工大学河南省瓦斯地质与瓦斯治理重点实验室, 河南焦作 454000
- 作者简介：
- 基金信息：
- DOI：10.12382/bgxb.2021.0860
  CLC：
- Received：20 December 2021，
  
  Published Online：25 July 2023，
  
  Published：28 April 2023
- 稿件说明：
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Huanjuan ZHAO, Keqing LIU, Lei PANG, et al. Effect of Detonation Instability and Initial Pressure on Track Angle of Spinning Detonation[J]. Acta Armamentarii, 2023, 44(4): 1086-1096.
DOI：

Huanjuan ZHAO, Keqing LIU, Lei PANG, et al. Effect of Detonation Instability and Initial Pressure on Track Angle of Spinning Detonation[J]. Acta Armamentarii, 2023, 44(4): 1086-1096. DOI： 10.12382/bgxb.2021.0860.

摘要

为研究爆轰不稳定性及初始压力对螺旋爆轰轨迹角的影响

开展了预混气螺旋爆轰实验研究。利用内径63.5mm、长4m的爆轰管道系统对4组预混气(气体Ⅰ:2H

+50%Ar

气体Ⅱ:C

+2.5O

+85%Ar

气体Ⅲ:C

+5N

气体Ⅳ:CH

+2O

)进行爆轰实验;采用烟膜技术记录螺旋爆轰波的胞格结构

测量不同预混气在不同压力下右旋、左旋横波与管轴形成的轨迹角

、

分析轨迹角的变化、初始压力以及爆轰不稳定性对其影响。实验结果表明:4种预混气的螺旋爆轰轨迹角均位于30°~50°范围内;爆轰不稳定性相对较弱的气体(气体Ⅰ

气体Ⅱ

气体Ⅲ)

轨迹角测量值与声学理论计算得到的理论值吻合度较好

不稳定性强的气体(气体Ⅳ)

测量值与理论值吻合度较差;4种预混气的轨迹角离散度大小及变化趋势与壁面胞格离散度一致;随着初始压力增大

4种预混气的轨迹角均明显减小

减小幅度相近

且在高频螺旋阶段

初始压力比爆轰不稳定性对轨迹角的影响作用更强。

Abstract

Experiments were conducted in the detonation tube with an inner diameter of 63.5mm to study the effect of initial pressure and detonation instability on track angle. In the detonation experiments

four typical premixed mixtures (which could be divided into stable mixtures such as Ⅰ:2H

+50%Ar

Ⅱ:C

+2.5O

+85%Ar and Ⅲ:C

+5N

and unstable mixtures such as Ⅳ:CH

+2O

) were used. During the experiments

the cellular structure of the spinning detonation wave was recorded on the smoked foils. And then

the track angles

between the right-handed/left-handed transverse waves and the tube axis were measured under different pressures. At the meantim

the variation of track angle and the influence of initial pressure and gas instability on track angle were analyzed. The results were obtained as follows. The track angles of the four premixed mixtures were in the range of 30°~50°. For the gases (Ⅰ

Ⅱ

Ⅲ) with relatively weak detonation instability

the measured values of track angle were in good agreement with theoretical values. However

for the gas with high instability (Ⅳ)

the agreement was poor. The magnitude and variation trend of the dispersion of track angle was consistent with those of the cellular structure dispersion. In addition

the higher the initial pressure

the smaller the track angle. As the initial pressure increases

the track angles of the four premixed gases were all significantly decreased

and the decrease was basically consistent. Finally

in the high-frequency spinning phase

the effect of initial pressure on track angle was stronger than that of detonation instability.

关键词

Keywords

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