介质阻挡放电三层放电气隙放电丝的光谱特性研究

发布时间：2018-04-21 21:18

本文选题：介质阻挡放电 + 分子振动温度　；参考：《光谱学与光谱分析》2017年02期

【摘要】：在空气与氩气组成的混合气体的介质阻挡放电实验中,采用发射光谱法,首次研究了放电气隙分别为:1,4和2mm三层放电气隙中的放电丝的光谱特性。这与以往的单层放电气隙或者是双层放电气隙中的放电丝在光谱特性方面有很大的不同。实验通过采集氮分子第二正带系(C~3Π_u→B~3Π_g)谱线,计算出不同放电气隙中的放电丝的分子振动温度。利用氮分子离子391.4nm谱线强度与氮分子394.1nm谱线的强度之比得到不同放电气隙中放电丝的电子平均能量。增加氩气在混合气体中的比例,得到分子振动温度及电子平均能量随着氩气含量增加的变化趋势。实验结果表明:在同一氩气含量下,分子振动温度从小到大的顺序为:2mm放电气隙,1mm放电气隙,4mm放电气隙。电子平均能量从小到大的顺序为:4mm放电气隙,2mm放电气隙,1mm放电气隙。三层放电气隙中放电丝的分子振动温度及电子平均能量均随着氩气含量的增加而减小。
[Abstract]:In the experiment of dielectric barrier discharge (DBD) of mixed gases composed of air and argon, the spectral characteristics of the discharge wires in the three-layer discharge gap of 1: 1C and 2mm were studied for the first time by means of emission spectroscopy. It is very different from the single layer discharge gas gap or the discharge wire in the double layer discharge air gap in terms of spectral characteristics. The molecular vibrational temperature of the discharge wire in different discharge air gap is calculated by collecting the second positive band system of nitrogen (C _ (3)) ~ (3) ~ (-1) C _ (3) Pi _ (3) C _ (3) S _ (-1) spectrum line. The average electron energy of the discharge wire in different discharge gap was obtained by using the ratio of the intensity of nitrogen molecular ion 391.4nm line to that of nitrogen molecule 394.1nm line. The variation trend of molecular vibration temperature and electron average energy with the increase of argon content is obtained by increasing the proportion of argon in the mixture gas. The experimental results show that at the same argon content, the order of molecular vibration temperature from small to large is: 1 mm discharge air gap and 1 mm discharge air gap and 4 mm discharge air gap. The order of the average electron energy from small to large is as follows: 1 mm / 2 mm / 2 mm / 2 mm / 2 mm / 2 mm / 1 mm / 2 / 1 mm / g. The molecular vibration temperature and the average electron energy of the discharge wire in the three-layer discharge gap decrease with the increase of argon content.
【作者单位】：河北大学物理科学与技术学院;河北省光电信息材料重点实验室;
【基金】：国家自然科学基金项目(11375051) 河北省教育厅项目(LJRC011)资助
【分类号】：O461.2

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