Investigation on the influence of electrode geometry on characteristics of coaxial dielectric barrier discharge reactor driven by an oscillating microsecond pulsed power supply

摘要: In this paper, an oscillating microsecond pulsed power supply with rise time of several tens nanosecond (ns) is used to excite a coaxial DBD double layer dielectric barriers. The effects various electrode geometries by changing the size inner quartz tube (different gaps) on discharge uniformity, deposition, energy efficiency, and operation temperature are investigated electrical, optical, diagnostics. electrical parameters obtained from measured applied voltage current using equivalent model. efficiency deposition in air gap also parameters, heat loss analyzed conduction It found that at same voltage, increasing gap, uniformity becomes worse decrease. At 2.5 mm 24 kV reaches maximum value 68.4%, 23.6 W best case. corresponding 64.3 °C after 900 s barrier 114.4 under thermal balance. experimental results provide important references optimize design performance reactor.