微孔电极中微孔参数对电声特性的影响  

Effect of pore characteristics on electro-acoustic characteristics in micro-porous electrode

作　　者：周贺[1] 管显涛 张允 张连成[1] 刘振[1] 闫克平[1] ZHOU He;GUAN Xian-tao;ZHANG Yun;ZHANG Lian-cheng;LIU Zhen;YAN Ke-ping(Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310028, Zhejiang, China)

机构地区：[1]浙江大学工业生态与环境研究所

出　　处：《声学技术》2019年第5期537-544,共8页Technical Acoustics

基　　金：国家重点研发项目(2017YFC0307403、2016YFC0303901)资助项目

摘　　要：为研究等离子体震源的电声特性随孔特性的变化,采用微孔电极放电,通过电压和电流探头测量负载电特性,阴影成像法和高速相机记录气泡脉动特征,水听器测量声脉冲,主要研究了不同微孔间距和数目下的电特性、气泡脉动和声特性。结果表明,随着微孔间距的增加,负载电压和能量不变,而负载电流和功率却在增加。另外,声脉冲幅值随着间距的增加出现了先上升再下降的趋势,最大可达到148.8kPa;当孔数增加时,负载的峰值电压和电流虽然减少,但气泡声脉冲数增加,致使直达波的峰值增大。因此,增加孔数对提高微孔电极放电声脉冲的峰值是有利的。In order to study the variation of electro-acoustic characteristics of the plasma source with the pore characteristics, the discharge of micro-porous electrode is adopted. In this study, the electrical characteristics of the load is measured by voltage probe and current probe, the bubble dynamics is recorded by high-speed camera and shadow method, and the acoustic pulse is measured by hydrophone respectively. The electro-acoustic characteristics of multi-bubble discharge of micro-porous electrode with different pore spacing and numbers are investigated. The results show that with the increase of pore spacing, the load voltage and load energy change a little, whereas the load current and load power increase, and the peak of acoustic pulse increases first and then reduces, the maximum peak can reach 148.8 kPa. Besides, when the pore number increases, the peak voltage and current of the load decrease, bur the number of bubble purse increases, which increases the peak value of the direct acoustic pulse. Therefore, for the micro-porous electrode, the pore spacing has a best value and the increase of pore number is beneficial to the peak value of the acoustic pulse.

关 键 词：等离子体震源 微孔电极 多气泡 电声特性 

分 类 号：TN912[电子电信—通信与信息系统]