金属箔电爆炸驱动飞片模型的设计及应用  

Design and Application of Flyer Velocity Model Accelerated by Electric Exploding Foil

作　　者：曾庆轩[1,2] 赵彦[1,2] 梁琦[1,2] 袁士伟[2] 

机构地区：[1]北京理工大学宇航科学技术学院,北京100081 [2]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《火炸药学报》2008年第6期50-53,共4页Chinese Journal of Explosives & Propellants

摘　　要：在研究电爆炸过程中桥箔非线性电阻变化的基础上,得到了一种描述桥箔电功率变化的理论计算模型。根据LLNL测量飞片速度的部分实验结果,估算出桥箔用于驱动飞片做功能量占桥箔吸收总能量的比率,即爆发前β1≈9.9×10-3,爆发后β2≈8.6×10-3。把带有能量转换系数的电功率计算模型应用到流体动力学程序,并对电爆炸驱动小尺寸飞片的飞行历程进行了一维数值模拟,模拟结果与LLNL实验值的偏差在±8%以内,与国内用VISAR测量的飞片速度历程吻合得较好。Based on the non-linear resistance model of foils in the process of explosion, a theoretical model for the electric-power of exploding foils was given. According to some of LLNL experimental velocities of flyers, the ratio of energy for accelerating flyers to that absorbed by foils was estimated, i.e. pre-burst β1≈9.9× 10^-3, and postburst β2≈8. 6 × 10^-3. The model of electric-power with energy conversion coefficient was applied to the one- dimension hydrodynamic code. And the position and velocity histories of flyers driven by exploding foils were simulated by this code. The calculated deviations of the flyer velocity lie in ±8% for LLNL experimental data. The simulated curves of flyer velocity history coincide well with those of VISAR measurement.

关 键 词：爆炸力学 爆炸箔起爆器 电导率 飞片速度 功率曲线 数值模拟 

分 类 号：O351.2[理学—流体力学] TD235.374[理学—力学]