大气压下多脉冲均匀介质阻挡放电的研究  

Study on homogeneous multiple-pulse barrier discharge at atmospheric pressure

作　　者：王艳辉[1] 王德真[1] 

机构地区：[1]大连理工大学三束材料改性国家重点实验室物理系,大连116023

出　　处：《物理学报》2005年第3期1295-1300,共6页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :10 2 75 0 10 )资助的课题 .~~

摘　　要：基于一维流体力学模型 ,数值计算研究了大气压下氦气中多脉冲均匀介质阻挡放电的形成原因和性质 ,分析讨论了所加电压频率、幅值及介质板性质等对多脉冲均匀放电的影响 .模拟结果显示 ,当放电间隙较小时 ,由于介质表面积累电荷增加 ,感应电场增强 ,在外加电压的每半个周期内 ,可以形成多个放电脉冲 ,这些脉冲相应于等时间间隔的分立击穿 .放电间隙越窄 ,半个周期内形成的脉冲数目越多 .所加电压频率和幅值的变化不仅影响脉冲的幅度 ,同时也使放电脉冲的数目发生变化 ,而介质层厚度及介电常数的变化对放电脉冲数目没有明显的影响 .The homogeneous barrier discharge with multiple current pulses at atmospheric pressure in helium is numerically investigated on the basis of one-dimensional fluid model. The influence of the applied voltage amplitude, frequency, as well as dielectric layer characteristics on the multiple-pulse discharge is discussed and analyzed. The simulation results show that, in the case of smaller gap width, multiple current pulses can be formed in each half-cycle of the applied voltage due to the increase of surface density of the accumulation charges, leading to the enhancement of the induced electric field. Multiple pulses correspond to separate breakdowns in the same time interval. The smaller the gap width, the bigger the number of current pulses per half cycle. The applied voltage and frequency can also influence the number and the amplitude of current pulses. However, there is no obvious influence of the barrier thickness and the permittivity on the number of current pulses.

关 键 词：均匀介质 多脉冲 一维 周期 流体力学模型 电荷 感应电场 放电脉冲 电压 幅值 

分 类 号：O461.2[理学—电子物理学]