电压幅值对大气压氩气介质阻挡放电模式影响的数值模拟
Numerical simulation of influence of voltage amplitude on atmospheric pressure argon dielectric barrier discharge mode
摘要
Abstract
Dielectric barrier discharge(DBD),as a popular low-temperature plasma source,has drawn significant attention due to its extensive application fields including surface modification,material synthesis,and sterilization.The DBD has presented different modes under varying experimental conditions.In order to address the formation mechanisms of the different modes,a two-dimensional axis-symmetric fluid model is employed to simulate the characteristics of DBD in atmospheric pressure argon.The results indicate that the DBD undergoes a scenario from a discretely-filamentary mode,a diffuse mode,a complementarily-filamentary mode,to a columnar mode with the increase of voltage amplitude(Va)or discharge power(Pdis).The waveforms of applied voltage and discharge current indicate that for each discharge mode,the discharge current waveforms are always symmetrical for positive and negative discharge half-cycles.The discharge current exhibits single-pulse characteristics per half-cycle with low Va(or Pdis),and turns into double-pulse,triple-pulse,or multi-pulse characteristics per half-cycle as Va(or Pdis)increases.Spatial-temporal evolutions of electron density and electric field reveal that residual electrons play an important role in the discharge mode.Electric field(E)is mainly composed of its axial component,and its radial component only appears at the edge of the electrode in the diffuse mode.In the complementarily-filamentary mode,the locations of the strong-MDs and those of the weak-MDs alternately appear in the consecutive half-cycles.The strong-MD channels are stationary at fixed locations in the consecutive half-cycles for the columnar mode.In addition,the channel diameter of residual electrons in the columnar mode is larger than that in the filamentary mode.Moreover,as Va(or Pdis)increases,the generation rate of Ar*increases,while the energy efficiency of the discharge decreases.These results are of great significance for in-depth understanding discharge mode and improving DBD performance.关键词
介质阻挡放电/丝状模式/弥散模式/柱状模式Key words
dielectric barrier discharge/filamentary mode/diffuse mode/columnar mode引用本文复制引用
李雪辰,贾鹏英,葛禹琦,杨晨曦,刘晓倩,任晨华,冉俊霞,苏彤,张雪雪,杨歆垚..电压幅值对大气压氩气介质阻挡放电模式影响的数值模拟[J].物理学报,2026,75(6):32-42,11.基金项目
国家自然科学基金(批准号:12375250,11875121,51977057,11805013)、河北省自然科学基金(批准号:A2022201036,A2023201012)、河北省光电信息材料实验室科研成果补贴基金(批准号:22567634H)、河北省杰出青年基金(批准号:A2012201045)、河北大学自然科学跨学科研究计划(批准号:DXK201908,DXK202011)和河北大学研究生创新基金(批准号:HBU2022bs004)资助的课题. Project supported by the National Natural Science Foundation of China(Grant Nos.12375250,11875121,51977057,11805013),the Natural Science Foundation of Hebei Province,China(Grant Nos.A2022201036,A2023201012),the Optoelectronic Information Materials Laboratory Performance Subsidy Fund Program of Hebei Province,China(Grant No.22567634H),the Funds for Distinguished Young Scientists of Hebei province,China(Grant No.A2012201045),the Natural Science Interdisciplinary Research Program of Hebei University,China(Grant Nos.DXK201908,DXK202011),and the Post-graduate's Innovation Fund Project of Hebei University,China(Grant No.HBU2022bs004). （批准号:12375250,11875121,51977057,11805013）
