等离子体对发射药烧蚀作用的机理研究(英文)

为了研究等离子体对发射药的点火燃烧作用机理,在Keidar教授处理烧蚀问题的双层动力学模型基础上,建立了用于描述等离子体对发射药烧蚀作用的物理模型和数学模型。研究了等离子体对SF-3发射药、GR5发射药及新型ETPE发射药的烧蚀作用,利用所获得的电弧等离子体特性参数与发射药的特性参数对烧蚀质量进行了数值模拟。结果表明,在较低的电弧等离子体能量作用下,理论计算结果与实验结果具有较好的一致性,所建立的模型能够反映等离子体对发射药的烧蚀作用过程。随着等离子体能量的升高,理论计算结果与实验结果之间的偏差逐渐加大,反应作用因素影响增强。3种类型发射药中,ETPE发射药对电弧等离子体的敏感程度最弱,SF-3发射药对电弧等离子体的敏感程度最强。

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

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.