Plasma model of discharge along a dielectric surface in N{sub 2}/O{sub 2} mixtures

Journal Article · Wed Jun 15 00:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4949767· OSTI ID:22600148

Sima, Wenxia; Liu, Chunxiang; Yang, Ming; Shao, Qianqiu; Xu, Hang; Liu, Sanwei ^[1]

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1. State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing 400044 (China)

Surface discharge phenomena often occur across the insulator in power systems, damaging the electrical equipment, but the mechanism of the electron multiplication stage during surface discharge is not yet fully understood. As such, it is necessary to investigate the mechanism of discharge along a dielectric surface. In this paper, we develop a numerical fluid model, analyzing the dynamic characteristics of discharge including the electron density, electron temperature, surface charge density, and electric field. Our results show that the electron density peaks in the head of the streamer channel, at which time the electron temperature also reaches its maximum. A thin layer of plasma can be formed, filled with a mix of positive and negative charges, so the space normal electric field in the streamer channel can be positive or negative. In addition, the surface tangential electric field and electric potential are closely related, and the potential steadily increases because there is a steady tangential electric field in the streamer channel.

• OSTI ID: 22600148
• Journal Information: Physics of Plasmas, Vol. 23, Issue 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHARGE DENSITY
DIELECTRIC MATERIALS
ELECTRIC FIELDS
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ELECTRON DENSITY
ELECTRON TEMPERATURE
ELECTRONS
FLUIDS
MIXTURES
NITROGEN
OXYGEN
PLASMA
POWER SYSTEMS
SURFACES
THIN FILMS