冲压加速器预混推进剂爆轰速度研究

INVESTIGATION OF DETONATION VELOCITY OF PROPELLANT MIXTURE IN RAM ACCELERATOR

冲压加速器是利用推进剂气体混合物的化学能将弹丸加速到超过２ｋｍ／ｓ初速的新发射技术，根据弹丸的速度和气体混合物的爆轰速度可将它分为三种运动模式．简述了冲压加速器的基本原理，对冲压加速器中常用的甲烷、氧和氮混合物的爆轰速度进行了实验测量，并用爆轰理论对爆轰参数进行了计算．结果表明，改变气体混合物中稀释剂氮的含量，就可以调节它的爆轰速度，在甲烷当量比不变时，混合物的爆轰速度随氮的含量增多而下降．

Ram accelerator is a new propulsion technology for accelerating projectile to velocity over 2 km/s by using chemical energy of propellant gaseous mixture. Depending on the velocity of the projectiles and the Chapman Jouget (C J) detonation velocity of gaseous mixture, the ram accelerator operation modes can be divided into three regimes. The principle of ram accelerator is introduced, the detonation velocity of methane/oxygen/nitrogen propellant mixture has been measured in experiments, and the detonation parameters are calculated using detonation theory. It is shown that detonation velocity can be tailored through changing the amount of nitrogen dilution in gaseous mixture, when methane equivalence ratio is fixed, detonation velocity decreases with the along increases of nitrogen.