大气压氩气/空气介质阻挡放电中分子振动温度

Measurement of Molecular Vibrational Temperature in Dielectric Barrier Discharge in Argon/Air at Atmospheric Pressure

使用水电极介质阻挡放电装置,在氩气和空气混合气体放电中,利用光谱方法测量了氮分子（C^3Πu）的振动温度及其随空气含量的变化关系.计算中采用的是氮分子第二正带系（C^3Πu→B^3Πg）的发射谱线,顺序带组有：△v=-1,△v=-2和△v=-3.结果表明：大气压介质阻挡放电中氮分子振动温度范围为1 938～2 720 K,振动温度随空气含量的增加几乎是线性增加的.该工作对研究介质阻挡放电中等离子体的动力学过程具有重要意义.

Vibrational temperature of N2 （C^3Πu ） molecules in dielectric barrier discharge （DBD） in argon/air at atmospheric pressure, in which the water electrodes were employed, was measured by using a method of spectrum diagnosis. Emission spectral lines of the Nz second positive band system（C^3Πu→B^3Πg ） and the sequences of vibrational bands with △v=- 1, △v=- 2 and △v= -3 were used in the calculation. The experiment results show that the molecular vibrational temperature of Nz is in the range from 1 938 K to 2 720 K, and it increases almost linearly with increasing the air content in gas mixtttre. These results are of great importance to the study of plasma dynamics of DBD.