水静压对脉冲放电及深拖等离子体震源的影响  

Effects of hydrostatic pressure on pulsed discharge and deep-towed seismic source

作　　者：张连成[1,2] 黄逸凡[1,2] 刘振[1,2] 闫克平[1,2] 

机构地区：[1]浙江大学生物质化工教育部重点实验室,浙江杭州310027 [2]浙江大学化学工程与生物工程学系,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2015年第7期1395-1400,共6页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(41476080;51377145)

摘　　要：为了满足未来深拖等离子体震源的应用需求,基于高压脉冲电晕放电技术,研究不同水静压力下高压脉冲放电的电声特性.结果表明:水静压力对高压脉冲放电没有明显抑制,电压电流峰值及脉宽基本一致,波形上升沿高度一致;随着水静压力的增大,脉冲声波幅值呈指数衰减,当深度达到400m时,声压大约下降一半,1200m后衰减趋于平缓,单脉冲能量越小,声压级随水静压力增大衰减越快.对深拖等离子体震源进行可行性论证发现,当单脉冲能量高于20J时,深拖的声压级损失比常规海面拖曳的传播损失小.The electro-acoustic properties under different hydrostatic pressure were investigated based on the technology of pulsed high voltage corona discharge in order to meet the requirements of future deeptowed plasma seismic source.Experimental results show that high-voltage pulse discharge is not significantly inhibited by hydrostatic pressure.Peak values of voltage and current and their pulse widths are almost consistent and wave fronts are highly coincident.As the hydrostatic pressure increases,the acoustic pressure of shock wave exponentially decays.When the depth reaches 400 m,acoustic pressure nearly drops half,and the decay rate slows down after 1200 m.As the hydrostatic pressure increases,the lower energy of single pulse,the faster is decay rate.The technical feasibility of deep-towed plasma seismic source was demonstrated.Results show that when the energy of single pulse is more than 20 J,the loss of acoustic pressure level of deep-tow is less than the transmission loss of conventional tow.

关 键 词：水静压力 液相放电 电晕放电 电声特性 深拖 等离子体震源 

分 类 号：TQ9[化学工程]