水中脉冲放电的电特性与声辐射特性研究

对水中脉冲放电等离子体通道电阻与放电参数之间的关系作了研究,得到了等离子体通道电阻与电容量、初始电压、电极间距离的关系,以及通道电阻随时间的变化规律.还对冲击波的峰值压力与放电参数间的关系作了研究,并对冲击波压力的功率谱作了分析,结果表明水中脉冲放电所产生的冲击波的声辐射频率在几十赫兹到几万赫兹之间,覆盖了所有水声设备的工作频率,且在低频段具有很强的声功率,是一种理想的水下声源 关键词： 水中脉冲放电 等离子体

The electrical and acoustical characteristics of pulsed discharge in water

The relations between the resistance of the plasma channel of pulsed discharge in water and the circuit parameters are discussed; the laws of the channel resistance changed with capacitance, initial voltage and electrode gap width are presented. On the other hand, the relations between the peak pressure of shock wave and the circuit parameters are investigated, and the power spectrum of the shock wave is analysed. The results show that the frequency of the bandwidth of the acoustic radiation ranges from scores of hertz to scores of kilohertz, it covers all the frequencies of underwater sound equipment, and has high acoustic radiation power in low frequency band. Hence it is an ideal underwater sound source.