摘要
为深入理解氦气氛围电介质材料对介质阻挡放电(dielectric barrier discharge,DBD)的电气特性影响,建立单介质覆盖高压电极的1-D流体模型,通过有限元分析法进行数值模拟,采用频率10.0 k Hz、幅值2.0 kV的正弦交流激励,研究了亚稳态氦原子数密度、电子密度、电场强度的时空变化特性,以及介质材料、放电间隙和介质厚度对介质阻挡放电特性的影响。仿真结果表明:随着介电常数增加,电子密度和氦离子数密度均增大,同时介质表面累积的电荷密度增加,放电强度增强,碰撞功率损失变大;随着介质厚度增加,介质表面累积的电荷密度和空间电荷密度降低,碰撞功率损失逐渐下降,同时电子温度降低;随着放电间隙增大电子密度降低,同时介质表面累积的电荷密度、碰撞功率损失降低,放电强度减弱。
In order to study the influence of dielectric materials on the characteristics of dielectric barrier discharge(DBD)in helium,a 1-D fluid model with a single dielectric covered high voltage electrode was established.The number density of metastable Helium,electron density and electric field intensity of metastable helium and the effects of dielectric materials,discharge gap and dielectric thickness on DBD characteristics are also studied by using finite element method(FEM)in the case of a frequency of 10.0 kHz and an amplitude of 2.0 kV sinusoidal voltage.The simulation results show that with the increase of the dielectric constant,the electron density and helium ion number density increase,the cumulative charge density on the dielectric surface increases and the discharge process becomes more intense and the collision power loss increases.With the increase of dielectric thickness,surface charge density and space charge density on the dielectric surface decrease,the collision power loss decreases,and the electron temperature decreases.With the increase of discharge gap,the electron density decreases,while surface charge density on the dielectric surface decreases the collision power loss and the discharge process decreases.
作者
李平
徐俊生
陈兆权
许桂敏
LI Ping;XU Junsheng;CHEN Zhaoquan;XU Guimin(School of Electrical and Information Engineering,Anhui University of Science and Technology,Anhui Huainan 232001,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China;School of Electrical and Information Engineering,Anhui University of Technology,Anhui Maanshan 243002,China)
出处
《高压电器》
CAS
CSCD
北大核心
2020年第11期173-180,共8页
High Voltage Apparatus
基金
国家自然科学基金(51607003,11575003)
安徽省高校自然科学基金重点项目(KJ2016A194)
安徽理工大学博士科研基金项目(13190006)。
关键词
介质阻挡放电
有限元分析
介质材料
放电特性
电荷密度
dielectric barrier discharge(DBD)
finite element method
dielectric materials
characteristics of DBD
charge density
