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首页> 外文期刊>Journal of spectroscopy >Effects of Working Medium Gases on Emission Spectral and Temperature Characteristics of a Plasma Igniter
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Effects of Working Medium Gases on Emission Spectral and Temperature Characteristics of a Plasma Igniter

机译：工作介质气体对等离子体点火器发射光谱和温度特性的影响

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摘要

Ar, N2, O2, and N2-O2 mixture under different O2 components were separately used as the working medium gas of a plasma igniter to study the influence of working-medium-gas type and O2 concentration on emission spectral and temperature characteristics of a direct-current arc plasma igniter. The emission spectra of the plasma jet were also analyzed using the optical emission spectroscopy method, and the influence rule of working medium gas and O2 concentration on electron temperature and vibrational temperature of the plasma jet was calculated and analyzed. The experimental results show that the emission spectra of the plasma jet had significant differences when diverse working gases were used as the working medium of the igniter. With increasing O2 concentration in the working medium gas, the spectral line intensity of oxygen-containing particles in emission spectra of the plasma jet was significantly enhanced, and the spectral intensities of nitrogen-containing particles, NO molecular bands, the second positive system of N2C3∏u?B3∏g, and the first negative system of N2+B2∑u+?X2∑u+ were also enhanced obviously. Both electron and vibrational temperature of the plasma jet increased gradually with increasing O2 concentration in the working medium gas, and first increased and then decreased with increasing axial distance from the plasma jet.
机译：在不同O 2组分下的Ar，N 2，O 2和N2-O2混合物被单独用作等离子体点火器的工作介质气体，以研究工作中气型和O2浓度对直接发射光谱和温度特性的影响 - 电流弧等离子体点火器。还使用光学发射光谱法分析等离子体射流的发射光谱，计算并分析了等离子体射流电子温度和振动温度对工作介质气体和O2浓度的影响。实验结果表明，当使用不同的工作气体作为点火器的工作介质时，等离子体射流的发射光谱具有显着差异。随着工作介质气体中的浓度增加，等离子体射流发射光谱中的含氧颗粒的光谱线强度得到显着提高，含氮颗粒的光谱强度，没有分子带，N2C3的第二正系统ΠU？B3πg，N2 +b2σu+x2σu+的第一负系统也明显增强。等离子体射流的电子和振动温度均随工作介质气体中的浓度增加而增加，并且首先增加，然后随着距离等离子体射流的轴向距离而降低。

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