Numerical Simulation of the Chemical Combination and Dissociation Reactions of Neutral Particles in a Rarefied Plasma Arc Jet
Numerical Simulation of the Chemical Combination and Dissociation Reactions of Neutral Particles in a Rarefied Plasma Arc Jet
复制标题
稀薄等离子弧射流中中性粒子化学化合和解离反应的数值模拟
DOI：
10.1109/tps.2017.2659735
复制
发表时间：
2017-02
影响因子：
1.5
通讯作者：
Mohamed Pourkashanian
中科院分区：
文献类型：
--
作者：
Derek Ingham;Lin Ma;Ning Wang;Mohamed Pourkashanian
等离子弧射流中中性粒子的膨胀对于离子和电子的分布至关重要，特别是在发生化学反应的不稳定稀薄等离子弧射流中。基于内部直接模拟蒙特卡罗 (DSMC) 代码，对稀薄流中中性粒子的化学结合和解离反应进行 3D 非定常研究。介绍了真空筒中中性粒子流的演变，并研究了化学反应对中性粒子的影响。预测结果表明解离反应在中性粒子的膨胀过程中起着关键作用。为了研究中性粒子在电场中的膨胀，静电粒子单元（PIC）和DSMC相结合来模拟轴对称稀薄等离子体流的化学反应。考虑到两种方法对分子平均自由程和德拜长度的不同要求，DSMC/PIC方法采用了两组网格。详细分析了流场和电场的特性。研究发现，如果来自入口的离子的初速度足够大，则电势增大，相应地，流场中离子的数密度进一步增大。
The expansion of neutral particles in a plasma arc jet is crucial for the distribution of the ions and electrons, especially in an unsteady rarefied plasma arc jet with chemical reactions. A 3-D unsteady investigation of neutral particles in a rarefied flow with chemical combination and dissociation reactions is numerically simulated based on an in-house direct simulation Monte Carlo (DSMC) code. The evolution of the neutral particles flow in vacuum cylinders is presented, and the influence of the chemical reactions has been investigated for the neutral particles. The predicted results imply that the dissociation reaction plays a key role in the expansion of the neutral particles process. In order to study the expansion of the neutral particles in an electric field, an electrostatic particle-in-cell (PIC) and DSMC are combined to simulate the axisymmetric rarefied plasma flows with chemical reactions. Two sets of grids are employed for the DSMC/PIC method by considering the different requirements of both the methods based on the molecule mean free path and the Debye length. The properties of both the flow and electric fields are analyzed in detail. It is found that the electric potential increases if the initial velocity of the ions from the inlet is sufficiently large, and accordingly, the number density of the ions in the flow field increases further.
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DOI：
--
发表时间：
2013-07
期刊：
--
影响因子：
--
作者：
M. Hopkins;J. Boerner;C. Moore;E. Barnat;P. Crozier;S. Moore;M. Bettencourt;R. Campbell;L. Musson;Russell Hooper
通讯作者：
M. Hopkins;J. Boerner;C. Moore;E. Barnat;P. Crozier;S. Moore;M. Bettencourt;R. Campbell;L. Musson;Russell Hooper
影响因子：
1.5
作者：
Jin Seok Kim;M. Hur;I. Song;H. Lee;Hae June Lee
通讯作者：
Jin Seok Kim;M. Hur;I. Song;H. Lee;Hae June Lee
DOI：
10.1063/1.4769601
发表时间：
2012-11
期刊：
--
影响因子：
--
作者：
C. Moore;M. Hopkins;P. Crozier;J. Boerner;L. Musson;Russell Hooper;M. Bettencourt
通讯作者：
C. Moore;M. Hopkins;P. Crozier;J. Boerner;L. Musson;Russell Hooper;M. Bettencourt
DOI：
10.2514/6.2012-3736
发表时间：
2012-07
期刊：
--
影响因子：
--
作者：
P. Giuliano;I. Boyd
通讯作者：
P. Giuliano;I. Boyd
影响因子：
4
作者：
W. Steckelmacher
通讯作者：
W. Steckelmacher