金属桥箔电爆炸驱动飞片过程数值模拟研究

In order to study the performance characteristics and influence laws of the flyer driven by metal bridge foil electric explosion plasmas, a numerical calculation model of multiphase flow in the whole process of the flyer driven by metal bridge foil electric explosion plasmas was established, and numerical simulation was carried out. The phase transition from solid phase to plasma phase was described by phase transition fraction. The formation and motion behavior of electric explosion plasma was described by the state equation of high temperature and pressure plasma which took into account particle number and coulomb interaction between particles. The motion of flyer was described by dynamic grid model. The calculated results were compared with the experimental results, and the error between the calculated and experimental values was less than 5%, indicating that the accuracy of the calculation model is good. Based on this model, numerical simulations were carried out on the process of the electric explosion plasma driving flyer of the double-body array bridge foil and the single bridge foil with the same total area. Calculation results show that the superposition and convergence of plasma and shock wave in the electric explosion process of the double-body array bridge foil improves energy conversion efficiency, which increases the driving force of plasma and shock wave flow field on the flyer, thus increasing the speed of flyer. The ablation thickness of the surface of flyer is about 0.1 μm, and the integrity of flyer is good.