爆轰波对碰区产物驱动金属圆管的研究

Expansion of metallic tubes driven by detonation product behind two head-on colliding detonation waves

利用闪光X光照相、光学高速分幅照相实验,测得了金属圆管在两个爆轰波对碰后产物驱动外壳的膨胀、变形过程,该过程表明爆轰波对碰作用使得对碰处金属圆管相对贯穿断裂时间明显提前,对碰处金属圆管径向膨胀速度较非对碰处明显增加。利用拉格朗日二维流体动力学程序TTD2C,数值模拟了对碰驱动过程,计算结果与实验结果符合很好,且用Taylor断裂判据得到的金属圆管相对贯穿断裂时间也明显提前。

The data of expansion, deformation and fracture of metallic tube walls driven by detonation product behind two head-on colliding detonation waves have been obtained experimentally with flash X-ray cineradiography and high speed framing photography. It is shown that the head-on collision of two detonation waves greatly reduces the time needed for fracturing, and increases the radial expansion speed at the colliding positions of the tubes, and the fracturing time at colliding positions calculated from the Taylor criterion is indeed significantly reduced compared with that at non-colliding positions.