Electrodes Erosion Characteristics of Pulse Discharge in Water

被引：0
|
作者：
Nie Y. [1 ]
Kang Z. [1 ]
Wang C. [1 ]
Zhai G. [2 ]
Gong D. [3 ]
Wang Y. [2 ]
机构：
[1] Department of New Energy, China University of Petroleum, Qingdao
[2] Oil and Gas Survey Center, Ministry of Natural Resources and Environment, Beijing
[3] Guizhou Tongren Zhongneng Co., Ltd., Tongren
来源：
Kang, Zhongjian (kangzjzh@163.com) | 1600年 / Science Press卷 / 47期
关键词：
Character of temperature; Erosion of electrodes; Plasma; Pulse discharge in water; Shale reservoir improvement device;
D O I：
10.13336/j.1003-6520.hve.20200682
中图分类号：
学科分类号：
摘要：
To study the electrodes erosion characteristics of pulse discharge in water, a shale reservoir improvement device based on the theory of electrohydraulic effect, pulse power and spectrum resonance was developed. The highest pulse voltage and maximum pulse frequency of the device are 30 kV and 50 Hz, respectively, which satisfy the conditions of resonance. The distribution of temperature between electrodes and the temperature of electrodes surface were obtained by simulating the two-dimensional axisymmetric discharge model in water using COMSOL. The simulation results show that the anode temperature is higher at the initial stage of discharge and develops rapidly from anode to cathode. The temperature near the cathode is higher at the end of discharge. After the discharge, the highest temperature of electrode surface presents a ring shape with the same center as the electrode, and, the electrode surface temperature will increase when being close to the ring. The radius and depth of anode melting pool are higher than those of cathode, so the erosion of anode is more serious than that of cathode, which is consistent with the experimental results. The influence of different electrode gaps and different water pressure conditions on the electrode erosion is obtained by simulation. © 2021, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：2607 / 2614
页数：7
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