常压空气中大间隙介质阻挡放电特性  

Characteristics of Dielectric Barrier Discharge in Large Air Gap at Atmospheric Pressure

作　　者：李雪辰[1] 赵欢欢[1] 贾鹏英[1] 常媛媛[1] 

机构地区：[1]河北大学物理科学与技术学院,保定071002

出　　处：《高电压技术》2013年第4期876-882,共7页High Voltage Engineering

基　　金：河北省杰出青年基金(A2012201045);河北省自然科学基金(A2011201132A2009000149);河北省教育厅优秀青年项目(Y2011120)~~

摘　　要：常压空气中大间隙介质阻挡放电是一种低成本的等离子体产生方法。为此,研究了采用针-板介质阻挡放电(DBD)装置和光电倍增管对常压空气中大间隙介质阻挡放电的特性。结果表明,随着外加电压的变化,存在电晕放电和等离子体羽放电2种放电模式。电晕放电发生在针尖处很小的区域,而等离子体羽放电发生在针-板电极间的较大区域,且等离子体羽长度随外加电压呈阶段性变化。对等离子体羽不同位置的发光信号进行了空间分辨测量,发现针尖附近为连续放电,而远离针尖处为等离子体子弹放电。每次放电等离子体长度随电压峰值的增长关系与每个脉冲的起始电压随外加电压峰值的变化关系一致。Dielectric barrier discharge（DBDI in large air gap at atmospheric pressure is a kind of cheap method to produce plasma. Therefore, we investigated the discharge characteristics of DBD in a large air gap at atmospheric pressure by using a needle-plate device and photomultiplier tubes. Results showed that, there were two discharge modes with different peak values of applied voltages, i.e. corona discharge and plasma plume discharge. The corona discharge only appeared in the vicinity of needle tip, while the plasma plume discharge occupied a larger volume between the needle and plate electrodes, and its length varied as a function of applied voltage. Moreover, the light emission signals in different locations of plasma plume discharge were detected by spatial-resolved measurement, and it was found that the discharge near needle tip was continuous, whereas the discharge away from needle tip corresponded to the propagation of a luminous layer, behaving like a plasma bullet. It is concluded that relationship between increasing discharge length and the peak value of every discharge is the same as that between inception voltage and the peak value of applied voltage.

关 键 词：介质阻挡放电 电晕放电 等离子体羽 连续放电 等离子体子弹 大间隙 

分 类 号：O531[理学—等离子体物理]