中国物理B ›› 2009, Vol. 18 ›› Issue (2): 646-651.doi: 10.1088/1674-1056/18/2/042

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Characterizing uniform discharge in atmospheric helium by numerical modelling

王新新1, 罗海云1, 梁卓1, 吕博2   

  1. (1)Department of Electrical Engineering, Tsinghua University, Beijing 100084, China; (2)Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
  • 收稿日期:2008-08-13 修回日期:2008-08-25 出版日期:2009-02-20 发布日期:2009-02-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 50537020), and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No 2004003011).

Characterizing uniform discharge in atmospheric helium by numerical modelling

Lü Bo(吕博), Wang Xin-Xin(王新新)†, Luo Hai-Yun(罗海云), and Liang Zhuo(梁卓)   

  1. Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
  • Received:2008-08-13 Revised:2008-08-25 Online:2009-02-20 Published:2009-02-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 50537020), and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No 2004003011).

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摘要： One-dimensional fluid model of dielectric barrier discharge (DBD) in helium at atmospheric pressure was established and the discharge was numerically simulated. It was found that not only the spatial distributions of the internal parameters such as the electric field, the electron density and ion density are similar to those in a low-pressure glow discharge, but also the visually apparent attribute (light emission) is exactly the same as the observable feature of a low-pressure glow discharge. This confirms that the uniform DBD in atmospheric helium is a glow type discharge. The fact that the thickness of the cathode fall layer is about 0.5mm, much longer than that of a normal glow discharge in helium at atmospheric pressure, indicates the discharge being a sub-normal glow discharge close to normal one. The multipulse phenomenon was reproduced in the simulation and a much less complicated explanation for this phenomenon was given.

关键词: dielectric barrier discharge, atmospheric pressure glow discharge, glow discharge, numerical simulation

Abstract: One-dimensional fluid model of dielectric barrier discharge (DBD) in helium at atmospheric pressure was established and the discharge was numerically simulated. It was found that not only the spatial distributions of the internal parameters such as the electric field, the electron density and ion density are similar to those in a low-pressure glow discharge, but also the visually apparent attribute (light emission) is exactly the same as the observable feature of a low-pressure glow discharge. This confirms that the uniform DBD in atmospheric helium is a glow type discharge. The fact that the thickness of the cathode fall layer is about 0.5mm, much longer than that of a normal glow discharge in helium at atmospheric pressure, indicates the discharge being a sub-normal glow discharge close to normal one. The multipulse phenomenon was reproduced in the simulation and a much less complicated explanation for this phenomenon was given.

Key words: dielectric barrier discharge, atmospheric pressure glow discharge, glow discharge, numerical simulation

中图分类号:  (Glow; corona)

  • 52.80.Hc
52.65.-y (Plasma simulation) 52.25.Fi (Transport properties) 52.25.Tx (Emission, absorption, and scattering of particles)