DBD中表相放电对电荷及能量传递的影响
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摘要
通过两组电极结构多针—板和板—板以及微腔—薄板和薄板—薄板的对比实验,研究了小曲率半径电极在DBD中产生表相放电效应的特点,对DBD的应用和推广具有重要意义。文中首先利用U-Q Lissajous图形,分析了第一组实验中气隙电压和传输电荷的不同,计算出相同功率消耗下多针—板的传输电荷约为板—板的1.5倍,并在第二组中得到验证,即微腔沿面放电的表相效应也产生较多的传输电荷;然后利用约化场强,分析电子平均能量的变化及分子振动温度的差异,讨论尖极电晕的表相效应对电荷及能量传递的影响。研究结果表明:在不均匀电场DBD中,小曲率半径电极尖端的局部约化场强可达750 Td,但大部分气隙中约化场强远低于板—板结构;受此影响,尖端电极附近的电子平均能量约为13 eV,更易在空气中发生有效碰撞电离并产生大量电荷;但此时对应分子振动温度较低,其放电过程中产生的激发态粒子少于板—板结构。
To study characteristics of surface discharge effect in DBD,two sets of comparative experiments were con-ducted on plate-plate and multi-needle-plate electrode structures and microcavity-plate and thin plate-thin plate elec-trode structures. U-Q Lissajous figures were employed to analyze the air-gap voltage and charge transport in the firstset of experiment,and the result showed that the transferred charge of the multi-needle-plate electrode structure wasabout 1.5 times that of the plate-plate structure under the same power consumption. The second set of experiment ver-ified the above result,that is,the surface discharge effect of the microcavity produced more transferred charge.Then,reduced electric field was adopted to analyze the variation of average electron energy and the difference of mo-lecular vibration temperature,and the surface discharge effect of the needle electrode corona on transfer of chargeand energy was discussed. It was revealed that,in the non-uniform electric field of DBD,the local reduced electricfield of the electrode tip with small radius of curvature was up to 750 Td,but the reduced electric fields in most of theair gaps were far lower than that of the plate-plate structure. Therefore,the average electron energy around the elec-trode tip was about 13 eV,which facilitates collision and ionization of the electrons in air and production of a largeamount of charge. However,in this case,the temperature of molecular vibration was lower,and the excited particlesgenerated in the discharge process were less than that generated by the plate-plate structure.
To study characteristics of surface discharge effect in DBD,two sets of comparative experiments were con-ducted on plate-plate and multi-needle-plate electrode structures and microcavity-plate and thin plate-thin plate elec-trode structures. U-Q Lissajous figures were employed to analyze the air-gap voltage and charge transport in the firstset of experiment,and the result showed that the transferred charge of the multi-needle-plate electrode structure wasabout 1.5 times that of the plate-plate structure under the same power consumption. The second set of experiment ver-ified the above result,that is,the surface discharge effect of the microcavity produced more transferred charge.Then,reduced electric field was adopted to analyze the variation of average electron energy and the difference of mo-lecular vibration temperature,and the surface discharge effect of the needle electrode corona on transfer of chargeand energy was discussed. It was revealed that,in the non-uniform electric field of DBD,the local reduced electricfield of the electrode tip with small radius of curvature was up to 750 Td,but the reduced electric fields in most of theair gaps were far lower than that of the plate-plate structure. Therefore,the average electron energy around the elec-trode tip was about 13 eV,which facilitates collision and ionization of the electrons in air and production of a largeamount of charge. However,in this case,the temperature of molecular vibration was lower,and the excited particlesgenerated in the discharge process were less than that generated by the plate-plate structure.
引文
[1]武占成,张希军,胡有志.气体放电[M].北京:国防工业出版社2012:147-153.WU Zhancheng,ZHANG Xijun,HU Youzhi.Gas discharge[M].Beijing:National Defense Industry Press,2012:147-153.
[2]林海丹,马云飞,梁义明,等.聚合物绝缘材料表面电荷衰减特性研究进展[J].高压电器,2015,51(8):35-42.LIN Haidan,MA Yunfei,LIANG Yiming,et al.Research progress in dynamic behaviors of surface charge on polymer materials[J].High Voltage Apparatus,2015,51(8):35-42.
[3]KOGELSCHAT U.Dielectric-barrier discharge:Their history,discharge physics,and industrial application[J].Plasma Chemistry and Plasma Processing,2003,23(1):1-46.
[4]李清泉,房新振,许光可,等.沿面型介质阻挡放电的电气特性[J].电工电能新技术,2012,31(1):26-29.LI Qingquan,FANG Xinzhen,XU Guangke,et al.Electrical characteristics of surface dielectric barrier discharge[J].Advanced Technology of Electrical Engineering and Energy,2012,31(1):26-29.
[5]孙岩洲,孙念念,巩银苗.微腔结构介质阻挡放电的电气特性[J].高电压技术,2015,41(12):4008-4013.SUN Yanzhou,SUN Niannian,GONG Yinmiao.Electrical characteristics of microcavity structure dielectric barrier discharge[J].High Voltage Engineering,2015,41(12):4008-4013.
[6]王辉,孙岩洲,方志,等.不同电极结构下介质阻挡放电的特性研究[J].高压电器,2006,42(1):25-27.WANG Hui,SUN Yanzhou,FANG Zhi,et al.Study on the characteristics of dielectric barrier discharge of different electrode configuration[J].High Voltage Apparatus,2006,42(1):25-27.
[7]VOETEN S J,BECKERS F J C M,VAN HEESCH E J M,et al.Optical characterization of surface dielectric barrier discharges[J].IEEE Transactions on Plasma Science,2011,39(11):2142-2143.
[8]HONG D,RABAT H,PU Y K,et al.Measurement of the surface charging of a plasma actuator using surface DBD[J].Journal of Electrostatics,2013,71(3):547-550.
[9]严金云,方志,钱晨.不同电极结构介质阻挡特性比较[J].绝缘材料,2014,47(5):110-115.YAN Jinyun,FANG Zhi,QIAN Chen.Discharge characteristics comparison of dielectric barrier discharge with different electrode structures[J].Insulating Materials,2014,47(5):110-115.
[10]董丽芳,赵龙虎,王永杰,等.介质阻挡放电中体放电和沿面放电的光谱线形研究[J].光谱学与光谱分析,2014,34(2):308-311.DONG Lifang,ZHAO Longhu,WANG Yongjie,et al.Study on spectral line profile of volume discharge and surface discharge in dielectric barrier discharge[J].Spectroscopy and Spectral Analysis,2014,34(2):308-311.
[11]丁伟,何立明,宋振兴.常压空气介质阻挡放电的能量传递过程[J].高电压技术,2010,36(3):745-751.DING Wei,HE Liming,SONG Zhenxing.Energy transfer processes in atmospheric dielectric barrier discharge in air[J].High Voltage Engineering,2010,36(3):745-751.
[12]杜宏亮,何立明,兰宇丹,等.约化场强对氮-氧混合气放电等离子体演化特性的影响[J].物理学报,2011,60(11):449-454.DU Hongliang,HE Liming,LAN Yudan,et al.Influence of reduced electric field on the evolvement characteristics of plasma under conditions of N2/O2 discharge[J].Acta Physica Sinica,2011,60(11):449-454.
[13]朱益飞,贾敏,崔巍,等.大气压N2-O2混合气纳秒脉冲表面介质阻挡放电建模仿真[J].高电压技术,2013,39(7):1716-1723.ZHU Yifei,JIA Min,CUI Wei,et al.Modeling of nanosecond pulsed surface dielectric barrier discharge of N2-O2 mixture at atmosphere presuure[J].High Voltage Engineering,2013,39(7):1716-1723.
[14]SUN Y Z,ZENG M,CUI Z Y.Research on electrical characteristics of dielectric barrier discharge and dielectric barrier corona discharge[J].Japanese Journal of Applied Physics,2012,51(9):539-545.
[15]孙岩洲,巩银苗,孙念念.线筒结构电极介质阻挡放电的数值仿真[J].绝缘材料,2015,48(7):29-33.SUN Yanzhou,GONG Yinmiao,SUN Niannian.Numerical simulation of dielectric barrier discharge for line-cylinder structure electrodes[J].Insulating Materials,2015,48(7):29-33.
[16]孙岩洲,吴媛琦,孔亮.微腔结构DBD放电功率的研究[J].河南理工大学报(自然科学版),2016,35(1):136-140.SUN Yanzhou,WU Yuanqi,KONG Liang.Researches on discharge power of microcavity structure DBD[J].Journal of Henan Polytechnic University(Natural Science),2016,35(1):136-140.
[17]高军伟,孙岩洲,孙念念.不同尺寸微腔介质阻挡放电的对比研究[J].科学技术与工程,2016,16(13):63-67.GAO Junwei,SUN Yanzhou,SUN Niannian.Comparative study on microcavity dielectric barrier discharge of different dimensions[J].Science Technology and Engineering,2016,16(13):63-67.
[18]马爱清,肖兴恩,李峰.基于不均匀系数的气体冲击击穿电压计算方法研究[J].高电电器,2015,51(4):36-39.MA Aiqing,XIAO Xing’en,LI Feng.Calculation method research of gas breakdown voltage based on un-uniform factor[J].High Voltage Apparatus,2015,51(4):36-39.
[19]丁伟,于向财,唐岩辉.介质阻挡放电等离子体中的电子碰撞能量转换过程[J].高电电器,2011,47(6):43-47.DING Wei,YU Xiangcai,TANG Yanhui.Electron collision energy conversion processes in dielectric barrier discharge plasma[J].High Voltage Apparatus,2011,47(6):43-47.
[20]周前红,董志伟.弱电离大气等离子体电子碰撞能量损失的理论研究[J].物理学报,2013,62(20):205201.ZHOU Qianhong,DONG Zhiwei.Theoretical study on the energy loss induced by electron collisions in weakly ionized air plasma[J].Acta Physica Sinica,2013,62(20):205201.
[21]董丽芳,刘峰,李树锋,等.大气压氩气-空气介质阻挡放电中分子振动温度[J].光谱学与光谱分析,2006,26(5):802-804.DONG Lifang,LIU Feng,LI Shufeng,et al.Measurement of molecular vibrational temperature in dielectric barrier discharge in argon/air at atmospheric pressure[J].Spectroscopy and Spectral Analysis,2006,26(5):802-804.
[2]林海丹,马云飞,梁义明,等.聚合物绝缘材料表面电荷衰减特性研究进展[J].高压电器,2015,51(8):35-42.LIN Haidan,MA Yunfei,LIANG Yiming,et al.Research progress in dynamic behaviors of surface charge on polymer materials[J].High Voltage Apparatus,2015,51(8):35-42.
[3]KOGELSCHAT U.Dielectric-barrier discharge:Their history,discharge physics,and industrial application[J].Plasma Chemistry and Plasma Processing,2003,23(1):1-46.
[4]李清泉,房新振,许光可,等.沿面型介质阻挡放电的电气特性[J].电工电能新技术,2012,31(1):26-29.LI Qingquan,FANG Xinzhen,XU Guangke,et al.Electrical characteristics of surface dielectric barrier discharge[J].Advanced Technology of Electrical Engineering and Energy,2012,31(1):26-29.
[5]孙岩洲,孙念念,巩银苗.微腔结构介质阻挡放电的电气特性[J].高电压技术,2015,41(12):4008-4013.SUN Yanzhou,SUN Niannian,GONG Yinmiao.Electrical characteristics of microcavity structure dielectric barrier discharge[J].High Voltage Engineering,2015,41(12):4008-4013.
[6]王辉,孙岩洲,方志,等.不同电极结构下介质阻挡放电的特性研究[J].高压电器,2006,42(1):25-27.WANG Hui,SUN Yanzhou,FANG Zhi,et al.Study on the characteristics of dielectric barrier discharge of different electrode configuration[J].High Voltage Apparatus,2006,42(1):25-27.
[7]VOETEN S J,BECKERS F J C M,VAN HEESCH E J M,et al.Optical characterization of surface dielectric barrier discharges[J].IEEE Transactions on Plasma Science,2011,39(11):2142-2143.
[8]HONG D,RABAT H,PU Y K,et al.Measurement of the surface charging of a plasma actuator using surface DBD[J].Journal of Electrostatics,2013,71(3):547-550.
[9]严金云,方志,钱晨.不同电极结构介质阻挡特性比较[J].绝缘材料,2014,47(5):110-115.YAN Jinyun,FANG Zhi,QIAN Chen.Discharge characteristics comparison of dielectric barrier discharge with different electrode structures[J].Insulating Materials,2014,47(5):110-115.
[10]董丽芳,赵龙虎,王永杰,等.介质阻挡放电中体放电和沿面放电的光谱线形研究[J].光谱学与光谱分析,2014,34(2):308-311.DONG Lifang,ZHAO Longhu,WANG Yongjie,et al.Study on spectral line profile of volume discharge and surface discharge in dielectric barrier discharge[J].Spectroscopy and Spectral Analysis,2014,34(2):308-311.
[11]丁伟,何立明,宋振兴.常压空气介质阻挡放电的能量传递过程[J].高电压技术,2010,36(3):745-751.DING Wei,HE Liming,SONG Zhenxing.Energy transfer processes in atmospheric dielectric barrier discharge in air[J].High Voltage Engineering,2010,36(3):745-751.
[12]杜宏亮,何立明,兰宇丹,等.约化场强对氮-氧混合气放电等离子体演化特性的影响[J].物理学报,2011,60(11):449-454.DU Hongliang,HE Liming,LAN Yudan,et al.Influence of reduced electric field on the evolvement characteristics of plasma under conditions of N2/O2 discharge[J].Acta Physica Sinica,2011,60(11):449-454.
[13]朱益飞,贾敏,崔巍,等.大气压N2-O2混合气纳秒脉冲表面介质阻挡放电建模仿真[J].高电压技术,2013,39(7):1716-1723.ZHU Yifei,JIA Min,CUI Wei,et al.Modeling of nanosecond pulsed surface dielectric barrier discharge of N2-O2 mixture at atmosphere presuure[J].High Voltage Engineering,2013,39(7):1716-1723.
[14]SUN Y Z,ZENG M,CUI Z Y.Research on electrical characteristics of dielectric barrier discharge and dielectric barrier corona discharge[J].Japanese Journal of Applied Physics,2012,51(9):539-545.
[15]孙岩洲,巩银苗,孙念念.线筒结构电极介质阻挡放电的数值仿真[J].绝缘材料,2015,48(7):29-33.SUN Yanzhou,GONG Yinmiao,SUN Niannian.Numerical simulation of dielectric barrier discharge for line-cylinder structure electrodes[J].Insulating Materials,2015,48(7):29-33.
[16]孙岩洲,吴媛琦,孔亮.微腔结构DBD放电功率的研究[J].河南理工大学报(自然科学版),2016,35(1):136-140.SUN Yanzhou,WU Yuanqi,KONG Liang.Researches on discharge power of microcavity structure DBD[J].Journal of Henan Polytechnic University(Natural Science),2016,35(1):136-140.
[17]高军伟,孙岩洲,孙念念.不同尺寸微腔介质阻挡放电的对比研究[J].科学技术与工程,2016,16(13):63-67.GAO Junwei,SUN Yanzhou,SUN Niannian.Comparative study on microcavity dielectric barrier discharge of different dimensions[J].Science Technology and Engineering,2016,16(13):63-67.
[18]马爱清,肖兴恩,李峰.基于不均匀系数的气体冲击击穿电压计算方法研究[J].高电电器,2015,51(4):36-39.MA Aiqing,XIAO Xing’en,LI Feng.Calculation method research of gas breakdown voltage based on un-uniform factor[J].High Voltage Apparatus,2015,51(4):36-39.
[19]丁伟,于向财,唐岩辉.介质阻挡放电等离子体中的电子碰撞能量转换过程[J].高电电器,2011,47(6):43-47.DING Wei,YU Xiangcai,TANG Yanhui.Electron collision energy conversion processes in dielectric barrier discharge plasma[J].High Voltage Apparatus,2011,47(6):43-47.
[20]周前红,董志伟.弱电离大气等离子体电子碰撞能量损失的理论研究[J].物理学报,2013,62(20):205201.ZHOU Qianhong,DONG Zhiwei.Theoretical study on the energy loss induced by electron collisions in weakly ionized air plasma[J].Acta Physica Sinica,2013,62(20):205201.
[21]董丽芳,刘峰,李树锋,等.大气压氩气-空气介质阻挡放电中分子振动温度[J].光谱学与光谱分析,2006,26(5):802-804.DONG Lifang,LIU Feng,LI Shufeng,et al.Measurement of molecular vibrational temperature in dielectric barrier discharge in argon/air at atmospheric pressure[J].Spectroscopy and Spectral Analysis,2006,26(5):802-804.