水下等离子体声源放电特性和声特性实测与分析  

Measurement and analysis of discharge and acoustic characteristics of underwater plasma sound source

作　　者：吕皓男 冯燕涛 刘振[1] 闫克平[1] LYU Haonan;FENG Yantao;LIU Zhen;YAN Keping(Institute of Industrial Ecology and Environment,Zhejiang University,Hangzhou 310027,Zhejiang,China)

机构地区：[1]浙江大学工业生态与环境研究所,浙江杭州310027

出　　处：《声学技术》2024年第1期1-10,共10页Technical Acoustics

基　　金：国家重点研发计划(2017YFC0307403)。

摘　　要：在小型消声水池中,同步测量水下等离子体脉冲声源的放电特性和声特性,实验分析研究了其在单电极和多电极下负载注入峰值功率和放电能量对声特性的影响。结果表明,在相同的电极数和间距下,直达波脉冲声源级仅与负载注入峰值功率有关,气泡脉冲声源级和气泡周期则主要受放电能量影响,多电极放电通过减小单根电极放的电能量来减小气泡脉冲声源级和气泡周期。此外,在相同的充电电压下,减小充电电容对电极数的比,可以增大直达波脉冲声源级并压制气泡脉冲;负载注入峰值功率对放电能量的比对声特性的影响也呈现出类似规律。实测及其分析结果可为进一步优化水下等离子体脉冲声源的声特性提供参考。The discharge characteristics and acoustic characteristics of underwater plasma sound source are measured synchronously in a small anechoic pool.The influence of its electric characteristics on acoustic characteristics under single-electrode and multi-electrode discharges is investigated.The results show that under the same number and spacing of electrodes,the sound source level of direct wave pulse is only related to the load-injected peak power,and the sound source level of bubble collapse pulse and the bubble oscillation period are only related to the discharge energy.By reducing the discharge energy of single electrode in multi-electrode discharge,the sound source level of bubble collapse pulse and the bubble oscillation period are reduced.In addition,under the same charging voltage,reducing the ratio of charging capacitance to the number of electrodes can increase the sound source level of direct wave pulse and suppress the bubble collapse pulse.The effect of the ratio of load-injected peak power to discharge energy on acoustic characteristics also shows similar regularity.The experimental and analytical results can be used for further optimizing acoustic characteristics of underwater plasma sound source.

关 键 词：水中放电 水下等离子体脉冲声源 声源级 电声特性 电声关系 

分 类 号：TN912[电子电信—通信与信息系统]