等离子体点火条件下火药燃速的实验研究

利用改进的密闭爆发器对等离子体增强火药燃速的特性进行了实验研究.基于几何燃烧定律的假设,提出了等离子体作用下火药燃速的计算模型.针对等离子体是由外部电能以设定的波形和能量加在等离子体发生器上而产生的,模型重点考虑了脉冲放电波形和能量的影响.对单基药进行的密闭爆发器实验表明,火药燃速在等离子体注入期间显著增强,在放电功率达80 MW时燃速可增加2～3倍.该文提出的燃速实验方法对寻找与等离子体作用匹配的火药从而发挥电热化学发射技术的潜在优势具有重要意义.

Experimental Study on Propellant Burning Rate Under the Conditions of Plasma Ignition

A modified closed bomb was used to study burning rate characteristic of propellant enhanced by plasma. Based on the assumption of geometric burning law, a computational model of propellant burning rate under the effect of plasma was presented. Aiming at the problem that plasma is produced by addition of electrical energy to plasma generator, the effect of discharge pulse and energy was emphasized in the computational model. Experimental results of single base propellant indicate that enhancement of propellant burning rate during the injection of plasma is marked. Burning rate increases 2-3 times when discharge power reaches 80 MW. The method is of great importance in looking for compatible propellant with plasma, and it augments the potential advantage of electrothermal chemical launch technology.