介质阻挡放电
电极
材料科学
模式(计算机接口)
流光放电
电介质
光电子学
化学
计算机科学
物理化学
操作系统
作者
Bangfa Peng,Nan Jiang,Yifei Zhu,Jie Li,Yan Wu
标识
DOI:10.1088/1361-6595/ad3a9e
摘要
Abstract The streamer dynamic evolution and discharge mode transition of a three-electrode surface dielectric barrier discharge (SDBD) driven by repetitive pulses are studied experimentally and numerically for better plasma-mode control and optimized application. Spatial-temporal plasma morphologic features together with electro-optical behavior are utilized to analyze the streamer dynamic evolution and streamer-to-spark transition. To gain a deep insight into the physical mechanism of the discharge mode transition in repetitive pulses, a 2D fluid model combined with a 0D kinetic model is built and studied. A good agreement between the experimental measurements and numerical simulation in the propagation dynamics and voltage–current characteristics is achieved. The results show that the surface-streamer discharge in the form of primary and transitional streamers can transform into a surface-spark discharge characterized by the primary streamer, transitional streamer and spark phase in repetitive pulses under the high applied electric field. A high gas temperature will result in a large reduced electric field after the transitional streamer, which exceeds the ionization threshold and thus promotes the discharge mode transition. A high number of electrons can be released from the negative charges by oxygen atoms during the inter-pulse period, which is favorable for the re-ignition and ionization process of the subsequent pulse discharge.
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