中国物理B ›› 2012, Vol. 21 ›› Issue (7): 75201-075201.doi: 10.1088/1674-1056/21/7/075201
• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇 下一篇
刘兴华a, 何为a, 杨帆a, 王虹宇b, 廖瑞金a, 肖汉光a
Liu Xing-Hua(刘兴华)a)†, He Wei(何为)a), Yang Fan(杨帆)a), Wang Hong-Yu(王虹宇)b), Liao Rui-Jin(廖瑞金)a), and Xiao Han-Guang(肖汉光) a)
摘要: Air corona discharge is one of the critical problems associated with high-voltage equipment. Investigating the corona mechanism plays a key role in enhancing the electrical insulation performance. An improved self-consistent multi-component two-dimensional plasma hybrid model is presented for the simulation of a direct current atmospheric pressure corona discharge in air. The model is based on plasma hydrodynamic and chemical models, and includes 12 species and 26 reactions. In addition, the photoionization effect is introduced into the model. The simulation on a bar-plate electrode configuration with an inter-electrode gap of 5.0 mm is carried out. The discharge voltage– current characteristics and the current density distribution predicted by the hybrid model agree with the experimental measurements. In addition, the dynamics of volume charged species generation, discharge current waveform, current density distribution at an electrode, charge density, electron temperature, and electric field variations are investigated in detail based on the model. The results indicate that the model can contribute valuable insights into the physics of an air plasma discharge.
中图分类号: (Plasma kinetic equations)