摘要
基于强爆轰效应,提出一种新的超高速弹丸发射装置。在二级轻气炮平台上,设计内置炸药柱的三级加速腔,将二级轻气炮发射的克质量弹丸由6～7km/s,再次加速至9～10km/s的超高速。通过数值模拟优化设计药柱与飞片的形状,以及弹丸的树脂封装,从而抑制强爆轰产生的中心射流对弹丸的破坏,并且在短脉冲强冲击过程中,避免在直径达厘米级的铝或钛合金弹丸内的层裂破坏。数值模拟结果表明,经过优化设计的三级加速腔可以将气炮出膛速度约6.0km/s的1.03g铝合金弹丸加速至9.6km/s,弹丸最终形状仍保持类球形,速度增益约1.6。
A new scheme of hypervelocity launcher was put forward in this paper by means of strong detonation. An explosive ring was fixed internally in a specially designed third-stage barrel in which the projectile launched by two-stage gas gun at velocity ranging from 6 to 7 km/s was able to be accelerated subsequently to a hypervelocity of 10 km/s or so. Based on hydrocode simulations, the shape of flyer and explosive ring was optimally designed. In addition, through the encapsulation of the sphere projectile by epoxy resin, the projectile damages resulted both from detonation-induced jet and spalling due to the characteristic of short pressure pulse imposed on centimeter-sized projectiles would he suppressed. The simulations illustrate that the optimized hypervelocity launcher has the capability of accelerating 1.03 g aluminum alloy projectile with a velocity of 6 km/s to 9.6 km/s, keeping the sphere-like shape withthe velocity amplification ratio of 1.6.
出处
《高压物理学报》
EI
CAS
CSCD
北大核心
2011年第6期557-564,共8页
Chinese Journal of High Pressure Physics
基金
国防科技重点实验室基金(914006701011001)
国防科工局空间碎片项目(08201)
