大气压下气液两相介质阻挡放电的放电特性

Discharge Characteristics of Gas-liquid Two-phase Dielectric Barrier Discharge Under Atmospheric Pressure

丝网辅助气液两相介质阻挡放电(DBD)的研究目前主要集中在开放环境下废水治理应用方面,并且研究集中在放电电学特性方面,对于光谱分析研究较少,对于丝网网孔尺寸和大气相对湿度的影响规律研究比较少。为此以废气治理为目的,在封闭的大气环境下研究丝网网孔尺寸和空气相对湿度对气液两相DBD放电特性的影响,以及比较驱动电压频率对气液两相DBD和传统板板DBD放电特性的不同影响。实验结果发现,丝网网孔尺寸对放电功率有重要影响,空气相对湿度为85%时放电功率达到最大值,各自峰值频率下,气液两相DBD放电功率、电子激发温度等参数数值明显高于传统平板电极DBD。

Researches on screen auxiliary gas-liquid two-phase dielectric barrier discharge（DBD） currently focus on waste treatment applications in an open environment, and on the electrical characteristics of discharge. However, there is few analyses for spectrum and the impact of the screen mesh size and atmospheric relative humidity are found in literatures. Consequently, for the purpose of exhaust gas treatment, we studied the effects of the screen mesh size and the relative humidity on discharge characteristics of gas-liquid two-phase DBD, and compared the different effects of the driving voltage frequency on gas-liquid two-phase and traditional plate-plate DBD. It is found that a screen mesh size has a significant impact on the discharge power. The discharge power reaches a maximum peak when air relative humidity is 85%. At each peak frequency, the gas-liquid two-phase DBD discharge power, electronic excitation temperature, and other parameters are significantly higher than those of traditional plate-plate DBD.