水中铜丝电爆炸放电通道模型及仿真

Model and Simulation Study of Discharge Channel During Underwater Cu Wire Explosion

为研究水中金属丝电爆炸放电过程,基于比作用量模型和无量纲相似参数模型,提出了能够准确描述水中金属丝电爆炸的物理模型。该模型考虑了金属丝汽化时对外做功和辐射、热传等能量损耗,对比作用量模型进行了改进;并在此基础上,考虑了金属蒸汽击穿前的加热过程与击穿后的等离子体放电过程。结果表明:欠阻尼振荡条件下,计算得到的放电电流和电压的峰值与实验数据的相对误差分别为5.4%和3.1%;临界阻尼时,该误差分别为11.3%和8.7%;因此该模型计算结果与实验数据相符,优于无量纲相似参数模型。

In order to research the underwater electrical wire explosion （UEWE） process, based on the specific action model and the dimensionless similarity parameter model, we proposed a modified model in order to give a more clear de- scription of the UEWE. This model considered energy consumption of DPC＇s expansion, radiation, heat transfer and so on, then improved the existed specific action model. Furthermore, nonlinear circuit simulation was adopted to simulate the whole discharge process, including the heating process before breakdown and the plasma discharge process after breakdown. The results showed that, the relative errors of currents and voltage amplitudes of calculated and measured data under under-damped condition were 5.4% and 3.1%, respectively; while the relative errors of those under critical-damped condition were 11.3% and 8.7%, respectively. Hence, the results calculated by this model is consistent with the experimental results, and the model is superior to the dimensionless similarity parameter model.