Numerical study on characteristics of nitrogen discharge at high pressure with induced plasma |
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| Authors: | Wang Yi-Nan Liu Yue Zheng Shu Lin Guo-Qiang |
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| Affiliation: | Key Laboratory of Materials Modification by Laser Ion and Electron Beams, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | Based on the fluid theory of plasma, a model is built to study the characteristics of nitrogen discharge at high pressure with induced argon plasma. In the model, the spices such as electron, N2+, N4+, Ar+, and two metastable states (N2 (A3∑u+), N2 (a1∑u-)) are taken into account. The model includes particle's continuity equations, electron's energy balance equation, and Poisson equation. The model is solved with a finite difference method. The numerical results are obtained and used to investigate the effect of time taken to add nitrogen gas and initially-induced argon plasma pressure. It is found that lower speeds of adding the nitrogen gas and varying the gas pressure can induce higher plasma density, and inversely lower electron temperature. At high-pressure discharge, the electron density increases when the proportion of nitrogen component is below 40%, while the electron density will keep constant as the nitrogen component further increases. It is also shown that with the increase of initially-induced argon plasma pressure, the density of charged particles increases, and the electron temperature as well as the electric field decrease. |
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| Keywords: | induced plasma nitrogen discharge numerical simulation |
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