液电脉冲激波特性分析  

Characteristics analysis of electrohydraulic shockwave

作　　者：吴敏干 刘毅 林福昌 刘思维 孙建军[1] Wu Min’gan;Liu Yi;Lin Fuchang;Liu Siwei;Sun Jianjun(School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China;State Key Laboratory of Advanced Electromagnetic and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science&Technology,Wuhan 430074,China)

机构地区：[1]武汉大学电气与自动化学院,武汉430072 [2]华中科技大学电气与电子工程学院强电磁工程与新技术国家重点实验室,武汉430074

出　　处：《强激光与粒子束》2020年第4期116-122,共7页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(51877095)

摘　　要：基于相应的数学模型来表征液电脉冲激波的产生和传播过程,搭建了液电式碎岩综合试验平台,分析了典型的激波特性的仿真和实测结果。给出了不同充电电压下液电脉冲激波特性的仿真结果,并分析了充电电压对激波特性的影响。结果表明:充电电压为11 kV时,激波的压力峰值为2.67 MPa,激波能量为27.30 J,波前时间为2.16μs,激波加载速率为1.24 MPa/μs,电能转化为激波能量的效率为13.35%;提高电容充电电压,激波压力峰值和激波能量增大,波前时间减少,激波加载速率增加,但电能转化为激波能量的效率降低。利用建模分析的方法,可以根据放电回路参数预测液电脉冲激波特性,从而为进一步研究激波破碎岩石的形态和效果提供理论依据。Characteristics of electrohydraulic shockwave are the keys to the application of electrohydraulic disintegration of rocks(EHDR). Mathematical models are used to characterize the generation and propagation of the shockwave, an integrated experimental platform is established, the measured and simulated results of typical shockwave characteristics are analyzed. The simulated results of characteristics of shockwaves under different charge voltage are given, and the influence of charge voltage on the shockwave characteristics are analyzed. The results show that the peak pressure and energy of shockwave is 2.67 MPa and 27.30 J respectively, the wave front time is 2.16 μs,the loading rate is 1.24 MPa/μs, when the charge voltage is 11 kV. The peak value and energy of shockwaves increase,the wave front time decreases, the loading rate of shockwaves increases, while the efficiency of electrical energy transfer into shockwave energy decreases, when the charge voltage of capacitor rises. Characteristics of shockwaves can be predicted from the parameters of discharge circuit via simulation, thus to provide theoretical basis for further study on the morphology and effect of EHDR.

关 键 词：液电式破碎 激波特性 等离子体通道 波前时间 加载速率 能量利用效率 

分 类 号：TM8[电气工程—高电压与绝缘技术]