文档介绍：
金属桥箔电爆炸等离子体流场演化过程数
值模拟研究#
陈朗,伍俊英,闫卓,孙崔元,王飞**
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(北京理工大学爆炸科学技术国家重点实验室,北京 100081)
摘要:为了研究金属桥箔电爆炸等离子体流场特征,对电爆炸等离子体流场演化过程进行了
二维数值模拟计算。建立了描述铜桥箔在电爆炸过程中由固态-汽态相态变化过程的多相流
计算模型。根据 Saha 电离平衡方程计算了铜蒸汽的电离度,确定了高温高压等离子体的状
态方程。分析了等离子体流场的温度、等离子体射流速度等特征参量的变化规律。计算结果
表明:金属桥箔电爆炸产生的冲击波波阵面以球形形状向外传播,流场中最高温度集中在等
离子体射流区域,最高可达 24000K,在冲击波波阵面后和等离子体发光区域,流场内部存
在多个温度梯度。在电爆炸后初期,由于等离子体导电作用能够继续吸收电能,使得等离子
体射流速度继续增加。
关键词:金属桥箔;电爆炸;等离子体;多相流;数值模拟
中图分类号:
Numerical Simulation of the Flow Field Evolution of Metal
Bridge Foil Electric Exploding
CHEN Lang, WU Junying, YAN Zhuo, SUN Cuiyuan, WANG Fei
(State Key Laboratory of Explosion Science and Technology, Beijing Institute of
Technology,Beijing 100081, China)
Abstract: In order to study the plasma flow field characteristics of metal foil exploding, the
plasma flow field evolution process was simulated. The two-dimension multiphase flow calculated
model used to describe the phase change from solid to vapor of the copper foil explosion was
established. The degree of ionization of copper vapor during metal explosion process according to
the Soha ionization equilibrium equation was calculated. The equation of state of the plasma was
determined, which can be good used to describe the non-ideal characteristics of the high
temperature and pressure plasma. The important characteristic parameters of the plasma flow