Study on pulsed breakdown characteristics in high pressurized nitrogen gas including supercritical state
Study on pulsed breakdown characteristics in high pressurized nitrogen gas including supercritical state
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超临界态高压氮气脉冲击穿特性研究
DOI：
10.1109/ppc.2015.7296951
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Tsuyoshi Kiyan
中科院分区：
文献类型：
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作者：
Yuta Iwasaki;Takashi Ishikawa;Tomihiro Mori;Tsuyoshi Kiyan
本文对纳秒脉冲放电在高压介质（包括超临界态氮气）中的击穿特性和击穿后现象进行了实验研究。在298 K温度和0.1 ~ 13.0 MPa压力范围内，对两种间隙电极结构的材料进行了介电性能、击穿电压等一系列实验。为了研究击穿后的现象，脉冲放电的可视化进行了使用Nd：YAG激光系统作为纹影诊断。实验结果表明：1）在实验条件下，从气相到超临界相，测量的击穿电压随压力的增加几乎呈线性增加，2）SCN_2相的介电恢复在1 kHz以内几乎完全，电压色散除外; 3）在P = 4 MPa，T = 298 K时，对应于SCN_2相的冲击波速度约为400 m/s。
In this study, the experimental studies of the breakdown characteristics and post-breakdown phenomena of nanosecond pulse electric discharge in high pressure fluids including supercritical state of nitrogen have reported. A series of experiments of dielectric property, breakdown voltage were measured in the conditions of the pressure range of 0.1 to 13.0 MPa with the temperature of 298 K by applied to two type gap electrode configurations. For study of post-breakdown phenomena, the visualizations of pulse discharges were conducted using a Nd:YAG laser system as Schlieren diagnostics. The experimental results show as follow: 1) the measured breakdown voltage increase with increasing almost linearly pressure against at the experimental condition in which the phase variation changes from a gas to supercritical phases; 2) the dielectric recovery of SCN2phase was recognized up to 1 kHz at nearly-complete except voltage dispersion; 3) shock wave velocity was estimated to about 400 m/s at the condition of P = 4 MPa, T = 298 K corresponding to SCN2phase.