物理学报2012，Vol.61Issue(24)：392-402,11.
大气压Ar／NH3介质阻挡辉光放电的仿真研究
Modelling study of dielectric barrier glow discharge in Ar/NH3 mixture at atmospheric pressure
摘要
Abstract
In order to investigate the mechanism of dielectric barrier glow discharge in Ar/NH3 mixture at atmospheric pressure, a multiple particles self-consistent coupled fluid model is proposed. And the finite-element method is used in the numerical calculation model, so the periodically varying waveforms of gas voltage, dielectric surface charge density and discharge current density are investigated. The spatial and temporal distributions of charged and neutral particles density and space electrical field strength are also obtained. The simulation results show that the periodic breakdown process of the gas gap is controlled by the gas voltage, and affected by dielectric surface charges. The spatiotemporal distributions of charged particle density and electrical field strength show that the discharge under conditions considered in this model is a typical atmospheric pressure glow discharge, and that in the discharge process there exist an obvious cathode fall region, a negative glow region, a Faraday dark space, and a positive column region. In the Ar/NH3 plasma, the dominant positive ions are NH+, and the next ions are Ar+; the dominant negative ions are NH2-; the main radical molecule products of ammonia decomposition are NH, NH2, and N2H3, but the main final stable products are N2 and H2.关键词
介质阻挡放电/大气压辉光放电/低温等离子体/流体模型Key words
dielectric barrier discharge/atmospheric pressure glow discharge/low temperature plasma/fluid model分类
数理科学引用本文复制引用
张增辉,张冠军,邵先军,常正实,彭兆裕,许昊..大气压Ar／NH3介质阻挡辉光放电的仿真研究[J].物理学报,2012,61(24):392-402,11.基金项目
国家杰出青年科学基金（批准号：51125029）资助的课题. （）
