汇聚型超高速发射装置的发射腔计算设计

Computational Design of the Cavity in the Enhanced Hypervelocity Launcher

使用多介质流体高精度计算程序(MFPPM,Multi-Fluid Piecewise Parabolic Method)对汇聚型超高速发射装置的发射腔进行了计算设计。根据发射腔角度的不同,提出了3种改进的发射腔结构,计算研究了发射腔角度和TPX厚度对二级飞片速度、速度差异和击靶位置平面性的影响。计算结果表明:在3种TPX厚度以及击靶位置下,使用第2种发射腔结构发射出的二级飞片的平面性最好、速度最高、汇聚效果最强,但平面性范围最小,且二级飞片自由面速度差异变大,其平面性难以得到维持。

Computational design of the cavity in the enhanced hypervelocity launcher was carried out using Eulerian code Multi-Fluid Piecewise Parabolic Method（ MFPPM）. Three kinds of improved configurations of the cavity were presented with varied angles of the cavity. We numerically investigated the effects of the angle and the thickness of the TPX on the velocity,the velocity difference and the planarity of the flier. Our results show that with the given thicknesses and position of the target,the planarity and the velocity of the flier launched by the second kind of the improved configuration are significantly improved,but the range of the planarity is reduced and the velocity differences of the flier surface are increased so that the desirable planarity cannot be maintained.