Generation of Electrohydraulic Shock Waves by Plasma-Ignited Energetic Materials: III. Shock Wave Characteristics With Three Discharge Loads
Generation of Electrohydraulic Shock Waves by Plasma-Ignited Energetic Materials: III. Shock Wave Characteristics With Three Discharge Loads
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DOI：
10.1109/tps.2015.2477357
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发表时间：
2015-09
影响因子：
1.5
通讯作者：
Haibin Zhou;Yongmin Zhang;Hengle Li;R. Han;Y. Jing;Qiaojue Liu;Jiawei Wu;Youzhi Zhao;A. Qiu
中科院分区：
文献类型：
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作者：
Haibin Zhou;Yongmin Zhang;Hengle Li;R. Han;Y. Jing;Qiaojue Liu;Jiawei Wu;Youzhi Zhao;A. Qiu
水下脉冲放电作为一种重要的等离子体辅助产生冲击波的技术，由于其复杂的物理过程，近年来受到了广泛的关注。基于3种放电负载，即水隙（WG）负载、电线（EW）负载和含能材料（EM）负载，简要介绍了放电过程，分析了相关SW的特性。首先，建立了实验装置，并给出了三种负载的典型结构。其次，研究和比较了三种载荷下的SW的固有特性，如峰值压力、冲量、正压持续时间和功率谱密度（PSD）。最后，进行了压裂效果实验，研究了SW压裂特性。结果表明，WG负载产生的SW具有最低的峰值压力、冲量和功率密度，EW负载产生的SW具有更好的能量转换效率和最大的峰值压力，EM负载产生的SW具有最大的冲量和功率密度。此外，SW断裂特征主要受其固有特性的影响。峰值压力和冲量决定了压裂的冲击次数，而裂缝形态受PSD的影响较大。
As an important plasma-assisted technology to generate shock waves (SWs), underwater pulsed discharge has drawn much attention in recent years for its complex physical process. Based on three discharge loads, the water gap (WG) load, the electrical wire (EW) load, and the energetic material (EM) load, the discharge processes are briefly introduced and the characteristics of the associated SWs are analyzed. First, the experimental setups were built and typical structures of the three loads were presented. Second, the inherent characteristics of SWs under the three loads, such as their peak pressure, impulse, and time duration of positive pressure and power spectral density (PSD), were studied and compared. Finally, a cracking effect experiment is carried out to study the SW fracturing characteristics. The results show that SWs generated with the WG load have the lowest peak pressure, impulse, and power density, SWs generated with the EW load have a better energy conversion efficiency and the largest peak pressure, and SWs generated with the EM load have the maximum impulse and power density. Furthermore, SW fracturing characteristics are mainly affected by its inherent characteristics. The peak pressure and impulse determine the shock number of fracturing, and the fracture pattern is significantly affected by the PSD.