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摘要详情

ID / 提交时间

250 / 2024-07-05 20:22:19

标题

Discharge Behaviors of SCN2 at the Temperature 127K and Pressure 4 MPa under DC Voltage

关键字

SCN2, discharge behavior, avalanche, streamer, charged particle clusters

主题及专题

7)Fundamental physics in Switchgear

状态

终稿

作者

Zheng Qiuping / China；Instrumentation technology and Economy Institute； Beijing 100055

Chen Ting / Harbin University of Science and Technology

Wang Yingli / China； Harbin 150080；Harbin University of Science &Technology

Hu Haitao / China； Harbin 150080；Harbin University of Science &Technology

dongyue cao / Harbin University of Science and Technology

zheng Dianchun / harbin University of science and technology

摘要

The precise mathematical method was adopted to simulation the breakdown process of the 5mm gap of the rod-plate electrode system being filled supercritical nitrogen at the condition of 127K, 4MPa and seed electron density1×10⁶m^-3 under 29kV DC voltage. The results showed that the discharge process was completed in 11.8 ns from seed electron triggering, avalanche bulking to streamer extending until gap eventually breakdown. The entire gap breakdown process was divided into three discharge stages, namely, the initial discharge triggered in 0~4ns, 4ns~7ns avalanche and 7ns~11.8ns streamer phase. At the same time, the facts were also revealed that the discharge evolution, electric field distribution, and electron density had different values, and also showed different temporal and spatial distribution characteristics along the axis of discharge gap. The research results obtained in this paper could be helpful to understand the discharge mechanism of supercritical nitrogen and provide theoretical basis for its application.