飞片材料对电爆驱动飞片速度的影响

Influence of Flyer Materials on Flyer Velocity Driven by Electric Explosion

采用任意反射面激光位移干涉测试技术(Displacement Interferometer System for Any Reflector,DISAR)分别获得了聚酯薄膜飞片、铝/聚酯薄膜飞片及铜/聚酯薄膜飞片在金属箔电爆驱动下的速度历程。结果表明,在充电电压为25.4 kV时,聚酯薄膜飞片在加速腔中的有效加速时间为1.6μs,最高速度约4.4 km·s-1;铝/聚酯薄膜飞片和铜/聚酯薄膜飞片在加速腔中的有效加速时间均大于3.0μs,最高速度均小于4.0 km·s-1。电爆驱动时,飞片材料对其运动特性有较大影响。金属/聚酯薄膜飞片相对于聚酯薄膜飞片更利于保持飞片的运行姿态,但飞行同样距离时其速度要低。

T he velocity histories of the M ylar flyer,Al/M ylar double-layer and C u /M ylar double-layer driven by electric explosion of metallic foil w ere recorded by displacement interferometer system for any reflector（ DISAR）. R esults show that at the charging voltage of 25. 4kV,the effective driven time and maximum flyer velocity in acceleration cavity is 1. 6 μs and 4. 4 km·s^-1for the M ylar flyer,and longer than 3. 0 μs and low er than 4. 0 km ·s^-1for the Al/ M ylar double-layer and C u / M ylar double-layer,respectively. T he materials of flyers play significant roles in their movement w hen it is driven by electric explosion. In comparison w ith the M ylar flyer,the metal/ M ylar doublelayer flyer is more conducive to keep running posture of flyer,but its speed is low er w hen flying the same distance.