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A Computational Study on the Discharge Characteristics of Atmospheric Dielectric Barrier Discharges at a Constant Power

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Plasma Science and Technology 2013年第10期15卷 1025-1030页

作者： SONG Xinxin TAN Zhenyu CHEN Bo ZHANG Yuantao School of Electrical Engineering Shandong University Jinan 250061 China State Gride of China Technology College Jinan 250002 China

The study on homogeneous DBDs at atmospheric pressure has attracted much attention for their advantages in applications. Tremendous work has been conducted both experimentally and numerically at a constant applied voltage or driving frequency. However the investigation of dielectric barrier discharges is still scarce for a constant power or power density. In this work, a new computational approach for DBDs is developed to explore atmospheric DBDs at a constant power based on a one-dimensional fluid model. The frequency and gap spacing effects on the atmospheric plasmas are systematically analyzed based on computational data. The computational results show that at a constant power both the current density and the amplitude of the applied voltage decrease, whereas the current pulse width increases, with increasing frequency. The simulation also indicates that as the gap spacing is raised with a fixed power and frequency, the current density and electron density increase initially, then reach their peak values, and then decrease, which means that there are maximum values for both of them. These results are significant for many industrial applications, as they can be used to optimize plasma devices of DBDs with the consideration of power consumption.

关键词： atmospheric dielectric barrier discharges simulation frequency gas spacing constant power

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