流动氩气介质阻挡放电特性及振动温度研究

采用双水电极介质阻挡放电装置，在流动氩气中通过改变气隙间距、驱动电源频率和气体流量等研究放电电学特性和振动温度的变化。电学测量结果发现如果固定其他实验条件而只改变某一参数，小气隙间距放电的电流峰值和功率比大气隙间距的高。同样，增大驱动电源频率也能够使放电的电流峰值和功率增加，而增加气体流量使得放电电流峰值和功率减小。最后利用光谱学方法，通过对放电发射光谱中氮分子振动带系的分析，发现振动温度随着放电气隙间距、电源频率和气体流量的变化关系与放电的电流峰值和功率的变化关系基本一致。这些结果对流动气体中大气压介质阻挡放电的应用具有重要意义。

Experimental Investigation of Electrical Characteristics and Vibrational Temperature of Barrier Discharge in Flowing Argon

The electrical characteristics and vibrational temperature were investigated as functions of gas gap width, driving frequency and gas flow rate in flowing argon by using a dielectric barrier discharge device with transparent water electrodes. Electrical measurement results show that the discharge with a smaller gas gap width has a higher value of peak current and consumes more power than that with a larger gap width. Both the peak value of discharge current and consumed power increase monotonically with increasing the driving frequency, and decrease with increasing the gas flow rate. Through analyzing the vibrational systems of nitrogen molecule by optical emission spectroscopy, it was found that the vibrational temperature has a similar trend with the peak value of discharge current and consumed power by changing the driving frequency, gas gap width and gas flow rate. These results are important to the industrial applications of atmospheric pressure barrier discharge in flowing gas.