CAJ | 학술논문

进行了单脉冲和多脉冲辉光放电试验,通过拍摄放电空间的ICCD短时曝光图像,研究了大气压多脉冲辉光放电的模式;通过测量外加电压和回路电流,计算了气隙的放电电压、放电电流、介质表面电荷和气隙放电的伏安特性曲线,探讨了多脉冲辉光放电的物理过程,研究了伏安特性曲线诊断大气压介质阻挡放电模式的可行性。结果表明：外加电压及其造成的放电积聚在介质的表面电荷,使辉光放电具有多脉冲的电流波形,外加电压升高促进放电,表面电荷积累抑制放电,但是起主导作用的是外加电压升高抑制作用不会超过促进作用造成放电熄灭,脉冲之间辉光放电并未熄灭;伏安特性曲线只能诊断多脉冲辉光放电的第一个脉冲的放电模式,即具有正特性时为汤森放电,具有负特性时为辉光放电,对后续脉冲伏安特性曲线不能用来诊断放电模式。
진행료단맥충화다맥충휘광방전시험,통과박섭방전공간적ICCD단시폭광도상,연구료대기압다맥충휘광방전적모식;통과측량외가전압화회로전류,계산료기극적방전전압、방전전류、개질표면전하화기극방전적복안특성곡선,탐토료다맥충휘광방전적물리과정,연구료복안특성곡선진단대기압개질조당방전모식적가행성。결과표명：외가전압급기조성적방전적취재개질적표면전하,사휘광방전구유다맥충적전류파형,외가전압승고촉진방전,표면전하적루억제방전,단시기주도작용적시외가전압승고억제작용불회초과촉진작용조성방전식멸,맥충지간휘광방전병미식멸;복안특성곡선지능진단다맥충휘광방전적제일개맥충적방전모식,즉구유정특성시위탕삼방전,구유부특성시위휘광방전,대후속맥충복안특성곡선불능용래진단방전모식。
Single pulse and multi-pulse glow discharges in helium at atmospheric pressure are carried out with dielectric barrier electrodes. By taking fast images of the discharges using an intensified charge couple device, the modes of discharges are investigated. Based on the measured current and the applied voltage, the discharge voltage across the gas gap, discharge current, accumulated charges on dielectric surface and the voltage-current characteristics are calculated. The application of voltage-current characteristics to discharge mode diagnosis is investigated, and physical mechanisms of discharges are discussed. The results show that the applied voltage and accumulated charges on dielectric surface due to discharge result in multiple current pulses, and the increase of applied voltage contributes to discharge, while accumulation of surface charges restrains to discharge. The contribution action of increasing applied voltage plays a master role, the restrain action of the accumulated charges can not surpass the contribution action, and thus the discharge does not extinguish among the pulses. The current-voltage characteristic, which is positive means the discharge is a Townsend discharge and negative means a glow one, can only diagnose the discharge mode of the first pulse. In the case of subsequent pulses, the characteristic can not diagnose the discharge mode.