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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (8): 085401.doi: 10.1088/2058-6272/aab3d2

• Low Temperature Plasma • Previous Articles     Next Articles

Numerical study on an atmospheric pressure helium discharge propagating in a dielectric tube: influence of tube diameter

Zhoutao SUN (孙洲涛), Wen YAN (晏雯), Longfei JI (季龙飞), Zhenhua BI (毕振华), Ying SONG (宋颖) and Dongping LIU (刘东平)   

  

  1. School of Physics and Materials Engineering, Dalian Nationalities University, Dalian 116600, People’s Republic of China
  • Received:2018-01-09 Published:2018-03-02
  • Supported by:

    This work was supported by National Natural Science Foundation of China (Nos.11705022, 11505025, 11705023), Innovation and Entrepreneurship Plan of Dalian Nationalities University (school-level A?+?Nos. 201712026380).

Abstract:

In this work, a two-dimensional numerical simulation of the discharge characteristics of helium plasma propagating inside a dielectric tube was performed. A trapezoidal +9 kV pulse lasting 400 ns was applied on a needle electrode set inside the dielectric tube to ignite the discharge. The discharges generated in the tubes with a variable or a constant inner diameter were investigated. The focus of this study was on clarifying the effect of the tube diameter on the discharge structure and dynamics. The comparison of the discharge characteristics generated in dielectric tubes with different diameters was carried out. It was shown that the tube diameter plays a significant role in discharge behavior of plasma propagating in the dielectric tube.

Key words: atmospheric pressure, helium discharges, discharge front, numerical simulation