Hydrodynamic chemical non-equilibrium model of a pulsed arc discharge in dry air at atmospheric pressure
Hydrodynamic chemical non-equilibrium model of a pulsed arc discharge in dry air at atmospheric pressure
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DOI：
10.1088/0963-0252/14/1/016
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发表时间：
2005-02
影响因子：
3.8
通讯作者：
Yasunori Tanaka;T. Michishita;Y. Uesugi
中科院分区：
文献类型：
--
作者：
Yasunori Tanaka;T. Michishita;Y. Uesugi
本文建立了一个含时流体动力学化学非平衡模型，用于模拟大气压下干燥空气中脉冲电弧放电的瞬态行为。该模型结合欧姆定律、安培定律和状态方程，同时求解各组分的动量、能量守恒方程和质量守恒方程。在这项研究中考虑了76个基元反应在干空气等离子体。这些计算介绍了化学非平衡成分对干空气等离子体热力学和输运性质的影响。导出了放电中粒子数密度、温度和压力径向分布随时间的变化规律。计算结果表明，在数密度分布、激波阵面扩展速度和压力演化方面与实验结果吻合较好。
We developed a time-dependent hydrodynamic chemical non-equilibrium model to simulate the transient behaviour of a pulsed arc discharge in dry air at atmospheric pressure. This model simultaneously solves the momentum and energy conservation equations and the mass conservation equation of each species, combining Ohm's and Ampere's laws and the state equation. Seventy-six elementary reactions in dry-air plasmas were considered in this study. These calculations introduced the influence of chemical non-equilibrium composition on thermodynamic and transport properties of dry-air plasmas. Time evolutions in the radial distributions of the number density, the temperature and the pressure in the discharge were derived. Calculation results indicated good agreement with experimental ones in terms of the number density distribution, the expanding velocity of the shock-wave front and the pressure evolution.