A new type of time-varying resistance model for plasma channel
In order to accurately analyze the actual variation law of plasma channel resistance during underwater discharge process,and to more precisely calculate physical quantities such as channel de-position energy and electro-acoustic conversion efficiency,a time-varying resistance function was con-structed based on the"U"curve of the plasma channel resistance of underwater discharges,where the parameters were determined by data fitting.And then,the time-varying resistance function was sub-stituted into the second-order variable coefficient differential equation with the channel current as the variable,and the numerical solution of the channel current was obtained by Runge-Kutta numerical al-gorithm.Lastly,the improved cosine similarity was used as the evaluation index to measure the difference between the simulation current and the measured current.The results show that the simula-tion current and the measured current are highly consistent,which verifies the effectiveness of the time-varying resistance model.
万方数据
维普
