爆磁压缩发生器的爆炸管动力学效应

 对爆磁压缩发生器中爆炸管2维动力学简化模型进行了模拟计算，分析表明：径向膨胀速度会随径向位置（或者时间）的变化而变化，因此膨胀角也会随径向位置（或者时间）发生变化。对各时间点（或位置点）处的膨胀速度进行了平均，求得理论上的平均膨胀速度，再将该平均膨胀速度与实验测量值进行了比较。模拟结果给出了径向膨胀速度受到端头效应影响的情况，这可为改进实验结果提供参考。由于径向速度与轴向速度的比值一般在5以上，用作爆炸管的物质质量越大，这一比值就越大，因此选择密度较大的金属材料作为爆炸管，可减少滑移。应用2D简化模型计算出的膨胀角数值，与Gurney模型以及1D模型进行了比较，它们之间的差别可能主要来自2D效应。

Dynamic effect of exploding tube in MFCG

By means of the 2-D simplified model,the dynamic process of the exploding tube of MFCG is simulated.The simulation results show that the expanding angle can be varied with the radial position(or different time) due to the radial velocity variation with the radial position(or different time).In order to compare the simulated expanding angle with the results of the experiments,the velocity should take an average over time(or position).The ending effect on the expanding velocity is given by simulation results and it may be useful to improve experimental results.The simulation results suggest that using high density metal material may reduce the sliding effect because the high density causes big ratio of radial velocity to axial velocity.The simulated expanding angles of 2-D model are compared with the 0-D model(Gurney) and 1-D model.The calculated difference between 2-D model and others may results from 2-D effect.