大气压介质阻挡放电中气隙电压研究

In this paper, the relationship between the voltage across gas gap and applied voltage is firstly studied in argon/air dielectric barrier discharge at atmospheric pressure. With the increase of the applied voltage, filaments structure undergoes four stages: random filaments-small spot hexagon structure-large spot hexagon structure-chaos. It is found that the peak value of the voltage across the gas gap increases nearly linearly with the applied voltage. The relationship between the voltage across gas gap at discharge moment, which is determined by optical signal of any discharge unit, and the applied voltage is measured. When the applied voltage is low, the variation range of the voltage across gas gap increases a little while overall voltage keeps around 2kV with the increase of the applied voltage. With the applied voltage increasing, the voltage across gas gap starts to decrease due to self-organization of filaments. When the large spot hexagon structure is formed with the applied voltage increasing further, the curve of the voltage across gas gap becomes two branches. When the chaos state appears with the applied voltage increasing further, the value of the voltage across gas gap distributes continuously in a wide range.