Uniform of Unipolar Nanosecond Pulse DBD in Atmospheric Air
Zhang Cheng1, 2, Shao Tao1, 3, Long Kaihua1, 2, Yu Yang1, 2, Yan Ping1, Zhou Yuanxiang3
1. Institute of Electrical Engineering of Chinese Academy of Sciences Beijing 100190 China 2. Graduate University of Chinese Academy of Sciences Beijing 100039 China 3. State Key Laboratory of Control and Simulation of Power System and Generation Equipment Tsinghua University Beijing 100084 China
Abstract：In order to obtain homogenous dielectric barrier discharge (DBD) in atmospheric air, the uniform of nanosecond pulse DBD is studied in the paper. The DBD is excited by positive unipolar nanosecond pulse with a rise time of about 15 ns and a full width at half maximum of 30～40ns, and the conditions and characteristics of homogenous DBD are analyzed by the measurement of their electrical discharge parameters and images. The experimental results show that the discharge current exhibits bipolar and the electrical parameters in unipolar nanosecond-pulse DBD are significantly higher than that in the DBD using ac or microsecond-pulse excitation. It is found that homogenous DBD can be obtained under certain condition. Furthermore, the effects of pulse repetition frequency (PRF) and air gap spacing on the uniform of DBD show that the PRF affects less on the uniform of DBD when both electrodes are covered by dielectrics and the air gap spacing is fixed at 2mm, but the discharge significantly transits from homogenous to filamentary mode when the air gap spacing increases from 2mm to 8mm. In addition, the relation ship between the uniformity of DBD and rise time of applied pulse is discussed.
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2010, Vol. 25 
