表面电荷对介质阻挡放电发展的影响  

Influence of Surface Charge on Development of Dielectric Barrier Discharge

作　　者：黄寅 孟永鹏[1] 马鑫哲 吴锴[1] 成永红[1] HUANG Yin;MENG Yongpeng;MA Xinzhe;WU Kai;CHENG Yonghong(State Key Laboratory of Electrical Insulation and Power Equipment(Xi’an Jiaotong University),Xi’an 710049,Shaanxi Province,China)

机构地区：[1]电力设备电气绝缘国家重点实验室(西安交通大学),陕西省西安市710049

出　　处：《中国电机工程学报》2023年第8期3248-3259,共12页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51677143,52130703)。

摘　　要：大气压介质阻挡放电(dielectric barrier discharge,DBD)中介质表面电荷分布对放电特性和放电形态演变具有重要影响,该文通过建立基于Pockels效应的高速表面电荷测量系统,研究放电起始后连续周期内介质表面电荷动态发展过程,并分析表面电荷分布对放电形态演化过程的影响。研究表明:在起始放电后几个周期内表面电荷斑位置不固定,电荷斑直径变化范围为1.5~2.5mm,且首次放电的表面电荷量高于后续放电;随着放电的发展,正表面电荷密度降低,负表面电荷密度升高,在放电逐渐稳定的过程中,正负表面电荷相互中和,电荷分布逐渐集中,最终使得电荷斑的位置、大小与放电量维持在一种稳定状态,正负表面电荷位置固定且重合度高,即表面电荷的记忆效应对平板电极中放电丝的稳定起到了重要作用。研究结果有助于理解表面电荷在放电形态演化中的作用机制。The dielectric surface charge distribution in the atmospheric pressure dielectric barrier discharge(DBD)has an important influence on the discharge characteristics and morphology evolution.In this paper,a high-speed surface charge measurement system based on Pockels effect is established to study the dynamic development process of dielectric surface charge in continuous cycle after the initiation of discharge.And the effect of surface charge distribution on the formation process of discharge form is analyzed.The results show that the position of the surface charge spot is not fixed in several cycles after the initial discharge.The diameter of the charge spot varies from 1.5 to 2.5 mm,and the surface charge of the first discharge is higher than that of the subsequent discharge.As the discharge progresses,the positive surface charge density decreases and the negative surface charge density increases.In the process of gradually stabilizing the discharge,the positive and negative surface charges neutralize each other,and the charge distribution gradually concentrates.Finally,the position,size and discharge amount of the charge spot are maintained in a stable state.The positive and negative surface charges are fixed in position and have a high degree of coincidence.The memory effect of surface charge plays an important role in maintaining the stability of the discharge filament in the flat electrode.The results are helpful to understand the mechanism of surface charge in the evolution of discharge morphology.

关 键 词：表面电荷 介质阻挡放电 放电发展 大气压氦气 POCKELS效应 

分 类 号：O461[理学—电子物理学]