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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (1): 14021-014021.doi: 10.1088/2058-6272/aa9325

• 18届全国等离子体科学和技术会议 • 上一篇    下一篇

Influence of arc current and pressure on non-chemical equilibrium air arc behavior

Yi WU (吴翊), Yufei CUI (崔彧菲), Jiawei DUAN (段嘉炜), Hao SUN (孙昊), Chunlin WANG (王春林) and Chunping NIU (纽春萍)   

  1. State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
  • 出版日期:2017-12-04 发布日期:2017-12-07

Influence of arc current and pressure on non-chemical equilibrium air arc behavior

Yi WU (吴翊), Yufei CUI (崔彧菲), Jiawei DUAN (段嘉炜), Hao SUN (孙昊), Chunlin WANG (王春林) and Chunping NIU (纽春萍)   

  1. State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
  • Online:2017-12-04 Published:2017-12-07
  • Supported by:

    This work was supported by the National Key Basic Research Program of China (973 Program) (No. 2015CB251002), National Natural Science Foundation of China under grant Nos. 51521065, 51577145 and 51707144, and the State Key Laboratory of Electrical Insulation and Power Equipment (No. EIPE17305).

Abstract:

The influence of arc current and pressure on the non-chemical equilibrium (non-CE) air arc behavior of a nozzle structure was investigated based on the self-consistent non-chemical equilibrium model. The arc behavior during both the arc burning and arc decay phases were discussed at different currents and different pressures. We also devised the concept of a nonequilibrium parameter for a better understanding of non-CE effects. During the arc burning phase, the increasing current leads to a decrease of the non-equilibrium parameter of the particles in the arc core, while the increasing pressure leads to an increase of the non-equilibrium parameter of the particles in the arc core. During the arc decay phase, the non-CE effect will decrease by increasing the arc burning current and the nozzle pressure. Three factors together—convection, diffusion and chemical reactions—influence non-CE behavior.

Key words: arc burning phase, arc decay phase, chemical reaction, arc current, pressure

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