局部阻燃火药在模块装药中的作用

Study on the Mechanism of Ablation Effect of Plasma upon Gun Propellant

通过定容燃烧实验比较了含局部阻燃火药的模块装药中各装药组分及其混合装药的燃烧性能。结果表明,定容燃烧实验中局部阻燃火药的混合装药p-t曲线拐点处的相对已燃烧部分Ψe值随装填密度的变化而变化。通过不同装填密度的混合装药中止实验,分析了Ψe值变化的原因。由势平衡理论结合实验数据分析表明,Ψe值变化与实际模块装药火炮内弹道p-t曲线上势平衡点的相对已燃烧部分ΨE值变化相对应。在模块装药中,局部阻燃火药能起到调节膛压的作用。

In order to study the interaction mechanisms of plasma and gun propellant,the physical and mathematical model describing the ablation effect of plasma upon propellant were put forward based on the double layer dynamic model which was founded by Professor Keidar.The ablation effect of SF-3 propellant,GR5 propellant and ETPE propellant was studied and their ablation mass was simulated with the arc plasma characteristic and the propellant characteristic in the model.The computed values and the experimental at ones are matched well under the ablation action of lower plasma energy.The model can describe the ablation process of gun propellant under the plasma.With increasing of plasma energy the deviation between computed and experimental results becomes larger.The reaction influence increases with the enhancement of plasma energy.With regards to the sensitivity of these propellants under the action of arc plasma,the double-base propellant is the strongest,and ETPE propellant is the weakest.