Numerical investigation of co-axial DBD: Influence of relative permittivity of the dielectric barrier, applied voltage amplitude, and frequency
Numerical investigation of co-axial DBD: Influence of relative permittivity of the dielectric barrier, applied voltage amplitude, and frequency
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DOI：
10.1063/1.4982657
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发表时间：
2017-05
影响因子：
2.2
通讯作者：
Siddharth Gadkari;S. Gu
中科院分区：
文献类型：
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作者：
Siddharth Gadkari;S. Gu
本文建立了纯氦同轴介质阻挡放电的一维流体模型，并进行了参数研究，系统地研究了介质阻挡层相对介电常数、外加电压幅值和频率对放电性能的影响。放电电流，间隙电压，和空间平均电子密度分布的相对介电常数和电压参数的函数。对于所考虑的几何形状，所施加的电压参数示出的放电电流峰值的最大幅度增加到一定的阈值，高于该阈值，它稳定或缓慢下降。空间平均的电子密度分布遵循类似的趋势，放电电流。相对介电常数的介质阻挡层预测有一个积极的影响，放电电流。在较低的频率下，它也被证明导致从汤森辉光放电的过渡。
In this work, a one-dimensional numerical fluid model is developed for co-axial dielectric barrier discharge in pure helium and a parametric study is performed to systematically study the influence of relative permittivity of the dielectric barrier and the applied voltage amplitude and frequency on the discharge performance. Discharge current, gap voltage, and spatially averaged electron density profiles are presented as a function of relative permittivity and voltage parameters. For the geometry under consideration, both the applied voltage parameters are shown to increase the maximum amplitude of the discharge current peak up to a certain threshold value, above which it stabilized or decreased slowly. The spatially averaged electron density profiles follow a similar trend to the discharge current. Relative permittivity of the dielectric barrier is predicted to have a positive influence on the discharge current. At lower frequency, it is also shown to lead to a transition from Townsend to glow discharge ...