反应气体驱动二级轻气炮发射特性实验及数值计算

Experiment and Numerical Calculation on Launching Performance of Two-Stage Light Gas Gun Driven by Gas Reaction

通过实验确定了20/57mm构型反应气体驱动二级轻气炮的气体装填参数与弹丸动能的关系。实验结果表明,反应气体驱动二级轻气炮的弹丸动能与气体反应化学能之间基本满足二次函数关系,系统发射稳定性满足加载实验要求。发展了基于气体爆轰模型的计算方法,通过数值计算获得了反应气体驱动二级轻气炮的发射特性,弹丸速度的计算结果与实测结果吻合较好。

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.