﻿ 反应气体驱动二级轻气炮发射特性实验及数值计算
 高压物理学报   2018, Vol. 32 Issue (5): 053201.  DOI: 10.11858/gywlxb.20180528.

## 引用本文 [复制中英文]

[复制中文]
DONG Shi, MENG Chuanmin, GU Wei, PENG Xusheng, ZHANG Botao, XIAO Yuanlu, FANG Maolin, XIANG Yaomin, WANG Xiang. Experiment and Numerical Calculation on Launching Performance of Two-Stage Light Gas Gun Driven by Gas Reaction[J]. Chinese Journal of High Pressure Physics, 2018, 32(5): 053201. DOI: 10.11858/gywlxb.20180528.
[复制英文]

### 文章历史

( 中国工程物理研究院流体物理研究所冲击波物理与爆轰物理重点实验室, 四川 绵阳 621999 )

1 实验方法与结果

 ${E_{\rm{p}}} = - 0.195 + 0.173{E_{\rm{c}}} - 0.023E_{\rm{c}}^2\;\;\;\;\;\;0.038\;{\rm{MJ < }}{E_{\rm{p}}} < 0.128\;{\rm{MJ}}$ (1)
 图 1 弹丸动能与气体反应化学能的关系 Fig.1 Kinetic energy of projectile vs.chemical energy

2 数值计算

 图 2 反应气体驱动二级轻气炮结构示意 Fig.2 Structure of two-stage light gas gun driven by reactive gas

 ${p_{\rm{c}}} = {p_0}{\left( {\frac{{{V_{\rm{c}}}}}{{{V_{\rm{c}}} + SL}}} \right)^{{k_0}}}$ (2)

 $a = \frac{{({p_{\rm{c}}} - {p_{\rm{p}}})S}}{{m + {m_{{\rm{add}}}}}}$ (3)

 ${m_{{\rm{add}}}} = 0.6SL{\rho _0}{\left( {\frac{{{p_{\rm{c}}}}}{{{p_0}}}} \right)^{1/k}}$ (4)

 $e = \frac{p}{{k - 1}}\left( {\frac{1}{\rho } - {a_{\rm{r}}}} \right)$ (5)

 图 3 实验弹速与计算弹速比较(插图为二者的相对误差) Fig.3 Calculated velocity vs.experimental velocity (The inset shows the relative error)

3 结论

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Experiment and Numerical Calculation on Launching Performance of Two-Stage Light Gas Gun Driven by Gas Reaction
DONG Shi , MENG Chuanmin , GU Wei , PENG Xusheng , ZHANG Botao , XIAO Yuanlu , FANG Maolin , XIANG Yaomin , WANG Xiang
( National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621999, China )
Abstract: In this paper, the launching performance of a developed 20/57 mm two-stage light gas gun was studied, of which the driving energy is supplied by the gaseous chemical reaction.The experimental results show that the relationship between the chemical energy and the kinetic energy of the projectile can be properly fitted with quadratic polynomials.The tests conducted under controlled repeatable conditions indicate good repeatability of system, thus verifying that the system satisfies the requirement of the loading experiments.In addition, we developed a ballistic model of the two-stage light gas gun driven by gas reaction, and calculated the velocities of projectiles, which are in good agreement with the experimental data.
Keywords: gas reaction    two-stage light gas gun    launching performance