Development of a dimensionless parameter for characterization of dielectric barrier discharge devices with respect to geometrical features

• Published in: Plasma science & technology 2017-09, Vol.19 (9), p.56-65
• Main Author: 林木森 Ahmad Zulazlan SHAH ZULKIFLI Kanesh Kumar JAYAPALAN Oihoong CHIN
• Format: Article
• Language: English
• Subjects: dielectric barrier discharge; dimensionless parameter; discharge power; energy ratio; geometrical effects; low temperature plasma; scaling factor; 介质阻挡放电; 几何特征; 几何特性; 放电能量; 放电装置; 无量纲参数; 表征; 非热等离子体
• ISSN: 1009-0630; 1009-0630
• DOI: 10.1088/2058-6272/aa7382

Non-thermal plasma（NTP） devices produce excited and radical species that have higher energy levels than their ground state and are utilized for various applications. There are various types of NTP devices, with dielectric barrier discharge（DBD） reactors being widely used. These DBD devices vary in geometrical configuration and operating parameters, making a comparison of their performance in terms of discharge power characteristics difficult. Therefore, this study proposes a dimensionless parameter that is related to the geometrical features, and is a function of the discharge power with respect to the frequency, voltage, and capacitance of a DBD. The dimensionless parameter, in the form of a ratio of the discharge energy per cycle to the gap capacitive energy, will be useful for engineers and designers to compare the energy characteristics of devices systematically, and could also be used for scaling up DBD devices.From the results in this experiment and from the literature, different DBD devices are categorized into three separate groups according to different levels of the energy ratio. The larger DBD devices have lower energy ratios due to their lower estimated surface discharge areas and capacitive reactance. Therefore, the devices can be categorized according to the energy ratio due to the effects of the geometrical features of the DBD devices, since it affects the surface discharge area and capacitance of the DBD. The DBD devices are also categorized into three separate groups using the Kriegseis factor, but the categorization is different from that of the energy ratio.