摘要
An experimental device is used to study the characteristics of dielectric barrier discharge(DBD)plasma excited by high voltage sub-microsecond pulse power in atmospheric air.Glass,polytetrafluoroethene(PTFE)and plexiglass are used as dielectric barrier materials.Comparatively homogeneous discharge is obtained within 130 mm diameter area in atmospheric air using the three dielectric materials with gap distances of 4.5 mm,6.5 mm and 6.5 mm,respectively.There is no filamentary discharge observed by naked eyes or by camera with the exposure time of 0.25 s.Gas gap voltage,discharge current,discharge power density,etc.are calculated by using Liu’s equivalent circuit model for pulsed DBD.These parameters are used to study the DBD characteristics.Typically,current varies from tens of amperes to hundreds of amperes in atmospheric air DBD excited by sub-microsecond pulses.The peak power can reach to MW order of magnitude.The average power surface density of 1.0 W/cm2and the average electron density of 1011cm 3can also be obtained in the discharge.Rotational and vibrational temperatures,approximately 400 K and 2 650 K,respectively,are obtained by using the emission spectrum of the discharge.This is the basic work performed for a better understanding of the characteristics of atmospheric air DBD plasma excited by high voltage sub-microsecond pulsed power source.
An experimental device is used to study the characteristics of dielectric barrier discharge （DBD） plasma excited by high voltage sub-microsecond pulse power in atmospheric air. Glass, polytetrafluoroethene （PTFE） and plexiglass are used as dielectric barrier materials. Comparatively homogeneous discharge is obtained within 130 mm diameter area in atmospheric air using the three dielectric materials with gap distances of 4.5 mm, 6.5 mm and 6.5 ram, respectively. There is no filamentary discharge observed by naked eyes or by camera with the exposure time of 0.25 s. Gas gap voltage, discharge current, discharge power density, etc. are calculated by using Liu＇s equivalent circuit model for pulsed DBD. These parameters are used to study the DBD characteristics. Typically, current varies from tens of amperes to hun- dreds of amperes in atmospheric air DBD excited by sub-microsecond pulses. The peak power can reach to MW order of magnitude. The average power surface density of 1.0 W/cm2 and the average electron density of 1011 cm 3 carl also be obtained in the discharge. Rotational and vibrational temperatures, approximately 400 K and 2 650 K, respectively, are obtained by using the emission specmma of the discharge. This is the basic work performed for a better understanding of the characteristics of atmospheric air DBD plasma excited by high voltage sub-microsecond pulsed power source.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2013年第9期2280-2287,共8页
High Voltage Engineering
基金
Project supported by National Natural Science Foundation of China（11035004）, Double Hundred Talent Fotmdation of CAEP （ 2009R0102）, Key Laboratory of Pulsed Power of CAEP Science and Technology Development Foundation （2008B0402037）.
