侧向稀疏波对非均质凝聚炸药冲击波起爆过程的影响

Lateral rarefaction wave effects on shock initiation of heterogeneous condensed explosives

以压装TNT为例,开展二维拉氏实验,利用二维锰铜-康铜组合拉氏量计测量了轴对称位置和径向位置的压力时程曲线和径向位移曲线。同时利用二维拉格朗日分析计算程序RFLA对压装TNT的冲击波起爆过程进行了计算,分别得到了在2个不同径向位置上各个Lagrange位置上的质点速度、相对比容、比内能等时程曲线。研究结果展现了侧向稀疏波对非均质炸药冲击起爆过程中各个流场物理量的影响。

Pressed TNT explosive was chosen to carry out 2-D Lagrangian experiments.There lied two 2-D composite manganin-constantan（CMC） Lagrangian gauges at the same Lagrangian position.And the two gauges were placed on and off the axis,respectively.The pressure and radial displacement were measured by the CMC Lagrangian gauges embedded between individual discs of explosives.And the shock initiation process of the pressed TNT was analyzed by using the 2-D reactive flow Lagrangian analysis.At the different Lagrangian positions,some variables were gained,such as particle velocity,relative specific volume,specific internal energy,reaction rate and frozen sound speed.Results reveal the effects of lateral rarefaction waves on explosive variables during shock initiation.