交流和纳秒脉冲激励氦气中等离子体射流阵列放电特性比较
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摘要
为获得大气压下均匀稳定的大尺度低温等离子体射流,用交流(AC)和纳秒(ns)脉冲电源激励在氦气中产生一维射流阵列放电,比较两种电源激励射流阵列的放电均匀性、瞬时功率、平均功率和发射光谱强度等放电特性和参量,并通过拍摄气流通道的纹影图像和估算射流单元之间的库仑力作用,研究和分析射流阵列的射流单元之间的流场和电场相互作用。结果表明,采用ns脉冲电源可以有效地提高射流阵的均匀性,增加等离子体羽长度、瞬时功率和粒子谱线强度,降低平均功率。不同于AC激励射流阵列,ns脉冲激励的射流阵列中两侧的射流单元几乎不发生偏转。采用ns脉冲激励可以同时减少气体加热作用和库仑力的排斥作用,从而有效地抑制射流单元之间的流场和电学相互作用,是提高射流阵列均匀性的主要原因。
To obtain the stable atmospheric pressure low-temperature plasma jet with large scale and good uniformity, a one-dimensional plasma jet array discharge in He was generated excited by alternating-current(AC) and nanosecond(ns) pulse voltage. Discharge characteristics and parameters of the jet arrays were compared, including the uniformity, instantaneous power, averaged power and intensities of optical emission spectrum. The hydrodynamic and electrical interactions among jets were analyzed by capturing the Schlieren images of gas channels and estimating the effect of Coulomb force among jets. The results show that the jet array excited by ns-pulse voltage can improve the downstream uniformity, increase plasma plume length, instantaneous power and intensity of optical emission spectrum, and reduce averaged power consumption. Different from the case in AC excitation, the jet array excited by ns pulse voltage has nearly no divergence in the lateral plumes. The ns pulse power source can also reduce the effects of gas heating and Coulomb repulsion force, thereby suppressing the hydrodynamic and electrical interaction among jets, which is the main reason for improving the uniformity of downstream plume.
To obtain the stable atmospheric pressure low-temperature plasma jet with large scale and good uniformity, a one-dimensional plasma jet array discharge in He was generated excited by alternating-current(AC) and nanosecond(ns) pulse voltage. Discharge characteristics and parameters of the jet arrays were compared, including the uniformity, instantaneous power, averaged power and intensities of optical emission spectrum. The hydrodynamic and electrical interactions among jets were analyzed by capturing the Schlieren images of gas channels and estimating the effect of Coulomb force among jets. The results show that the jet array excited by ns-pulse voltage can improve the downstream uniformity, increase plasma plume length, instantaneous power and intensity of optical emission spectrum, and reduce averaged power consumption. Different from the case in AC excitation, the jet array excited by ns pulse voltage has nearly no divergence in the lateral plumes. The ns pulse power source can also reduce the effects of gas heating and Coulomb repulsion force, thereby suppressing the hydrodynamic and electrical interaction among jets, which is the main reason for improving the uniformity of downstream plume.
引文
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[22]Sun P P,Cho J H,Park C H,et al.Close-packed arrays of plasma jets emanating from microchannels in a transparent polymer[J].IEEE Transactions on Plasma Science,2012,40(11):2946-2950.
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[24]Zhang Cheng,Shao Tao,Wang Ruixue,et al.Acomparison between characteristics of atmosphericpressure plasma jets sustained by nanosecond-and microsecond-pulse generators in helium[J].Physics of Plasmas,2014,21(10):123.
[25]Xiong Qing,Nikiforov A Y,Gonza′lez M A,et al.Characterization of an atmospheric helium plasma jet by relative and absolute optical emission spectroscopy[J].Plasma Sources Science and Technology,2013,22(1):015011.
[26]Karakas E,Koklu M,Laroussi M.Correlation between helium mole fraction and plasma bullet propagation in low temperature plasma jets[J].Journal of Physics D:Applied Physics,2010,43(5):155202.
[27]Shashurin A,Keidar M.Experimental approaches for studying non-equilibrium atmospheric plasma jets[J].Physics of Plasmas,2015,22(12):122002.
[28]王立军,郑雅霜,王丹,等.N2含量对大气压He等离子射流特性影响的数值模拟研究[J].中国电机工程学报,2017,37(10):2816-2823.Wang Lijun,Zheng Yashuang,Wang Dan,et al.Numerical modeling of a helium atmospheric pressure jet with various amounts of N2 admixture[J].Proceedings of the CSEE,2017,37(10):2816-2823.
[29]Wang Yong,Li Cong,Shi Jielin,et al.Measurement of electron density and electron temperature of a cascaded arc plasma using laser Thomson scattering compared to an optical emission spectroscopic approach[J].Plasma Science and Technology,2017,19(11):115403.
[2]林浩凡,王瑞雪,谢庆,等.等离子体射流快速改性促进表面电荷衰减[J].电工技术学报,2017,32(16):256-264.Lin Haofan,Wang Ruixue,Xie Qing,et al.Rapid surface modification by plasma jet to promote surface charge decaying[J].Transactions of China Electrotechnical Society,2017,32(16):256-264.
[3]方志,钱晨,姚正秋.大气压环环电极结构射流放电模型建立及仿真[J].电工技术学报,2016,31(4):218-228.Fang Zhi,Qian Chen,Yao Zhengqiu.The model and simulation studies for ring-ring electrode structure jet discharge at atmospheric pressure[J].Transactions of China Electrotechnical Society,2016,31(4):218-228.
[4]张若兵,韩倩婷,李爽,等.螺旋针-环结构等离子体射流放电过程分析[J].电工技术学报,2017,32(20):90-96.Zhang Ruobing,Han Qianting,Li Shuang,et al.Discharge process analysis of plasma jet with spiral needle-ring electrode[J].Transactions of China Electrotechnical Society,2017,32(20):90-96.
[5]吴阳阳,贾敏,王蔚龙,等.新型介质阻挡放电等离子体激励器的放电与诱导流动特性实验[J].电工技术学报,2016,31(24):45-53.Wu Yangyang,Jia Min,Wang Weilong,et al.Experimental research on the discharge and induced flow characteristics of a new dielectric barrier discharge plasma actuator[J].Transactions of China Electrotechnical Society,2016,31(24):45-53.
[6]方志,张波,周若瑜,等.HMDSO添加对大气压Ar等离子体射流阵列放电特性的影响[J].高电压技术,2017,43(6):1775-1783.Fang Zhi,Zhang Bo,Zhou Ruoyu,et al.Effect of HMDSO addition on discharge characteristics of atmospheric pressure plasma jet array in Ar[J].High Voltage Engineering,2017,43(6):1775-1783.
[7]邵涛,章程,王瑞雪,等.大气压脉冲气体放电与等离子体应用[J].高电压技术,2016,42(3):685-705.Shao Tao,Zhang Cheng,Wang Ruixue,et al.Atmospheric-pressure pulsed gas discharge and pulsed plasma application[J].High Voltage Engineering,2016,42(3):685-705.
[8]Walsh J L,Kong M G.Contrasting characteristics of linear-field and cross-field atmospheric plasma jets[J]Journal of Physics D:Applied Physics,2008,93(4):111501.
[9]任富强,汲胜昌,祝令瑜,等.基于同轴直管和倒置锥形管的氩大气压等离子体射流放电形态的实验和仿真[J].电工技术学报,2017,32(8):95-102.Ren Fuqiang,Ji Shengchang,Zhu Lingyu,et al.Experiment and simulation on the discharge modality of atmospheric pressure plasma jets in argon based on coaxial straight tube and inverted tapered tube[J].Transactions of China Electrotechnical Society,2017,32(8):95-102.
[10]Oh J S,Olabanji O T,Hale C,et al.Imaging gas and plasma interactions in the surface-chemical modification of polymers using micro-plasma jets[J].Journal of Physics D:Applied Physics,2011,44(15):155206.
[11]吴淑群,董熙,裴学凯,等.基于激光诱导荧光法诊断大气压低温等离子体射流中OH自由基和O原子的时空分布[J].电工技术学报,2017,32(8):82-94.Wu Shuqun,Dong Xi,Pei Xuekai,et al.Laser induced fluorescence diagnostics of the temporal and spatial distribution of OH radicals and O atom in a low temperature plasma jet at atmospheric pressure[J]Transactions of China Electrotechnical Society,2017,32(8):82-94.
[12]Qian Chen,Fang Zhi,Yang Jingru,et al.Investigation on atmospheric pressure plasma jet array in Ar[J].IEEE Transactions on Plasma Science,2014,42(10):2438-2439.
[13]Fan Qianqian,Qian Muyang,Ren Chunsheng,et al.Discharge characteristics of a cold-atmosphericplasma jet array generated with single-electrode configuration[J].IEEE Transactions on Plasma Science,2012,40(6):1724-1729.
[14]方志,康洺睿,周耀东,等.Ar气中1维等离子体射流阵列的实验研究[J].高电压技术,2015,41(6):2015-2021.Fang Zhi,Kang Mingrui,Zhou Yaodong,et al.Experimental study of a one-dimensional plasma jet array in Ar[J].High Voltage Engineering,2015,41(6):2015-2021.
[15]Ghasemi M,Olszewski P,Bradley J W,et al.Interaction of multiple plasma plumes in an atmospheric pressure plasma jet array[J].Journal of Physics D:Applied Physics,2013,46(5):052001.
[16]Wan Meng,Liu Feng,Fang Zhi,et al.Influence of gas flow and applied voltage on interaction of jets in a cross-field helium plasma jet array[J].Physics of Plasmas,2017,24(9):093514.
[17]Kim J Y,Ballato J,Kim S O.Intense and energetic atmospheric pressure plasma jet arrays[J].Plasma Processes and Polymers,2012,9(3):253-260.
[18]Fang Zhi,Ruan Chen,Shao Tao,et al.Two discharge modes in atmospheric pressure plasma jet array in argon[J].Plasma Sources Science and Technology,2016,26(1):01LT01.
[19]Liu Feng,Zhang Bo,Fang Zhi,et al.Jet-to-jet interactions in atmospheric-pressure plasma jet arrays for surface processing[J].Plasma Processes&Polymers,2018,15(1):e1700114.
[20]Zhang Cheng,Shao Tao,Zhou Yixiao,et al.Effect of O2 additive on spatial uniformity of atmosphericpressure helium plasma jet array driven by microsecond-duration pulses[J].Applied Physics Letters,2014,105(22):044102.
[21]方志,张波,阮陈.大气压He中2维射流阵列放电特性的影响因素[J].高电压技术,2016,42(4):1151-1158.Fang Zhi,Zhang Bo,Ruan Chen.Factor influencing on discharge characteristics of two-dimensional jet array in He at atmosphere pressure[J].High Voltage Engineering,2016,42(4):1151-1158.
[22]Sun P P,Cho J H,Park C H,et al.Close-packed arrays of plasma jets emanating from microchannels in a transparent polymer[J].IEEE Transactions on Plasma Science,2012,40(11):2946-2950.
[23]商克峰,王浩,岳帅,等.结构及供电电源对沿面介质阻挡放电装置放电特性及臭氧生成的影响[J].电工技术学报,2017,32(2):53-60.Shang Kefeng,Wang Hao,Yue Shuai,et al.Effect of configuration and power supply on the discharge characteristics and ozone generation of a surface dielectric barrier discharge device[J].Transactions of China Electrotechnical Society,2017,32(2):53-60.
[24]Zhang Cheng,Shao Tao,Wang Ruixue,et al.Acomparison between characteristics of atmosphericpressure plasma jets sustained by nanosecond-and microsecond-pulse generators in helium[J].Physics of Plasmas,2014,21(10):123.
[25]Xiong Qing,Nikiforov A Y,Gonza′lez M A,et al.Characterization of an atmospheric helium plasma jet by relative and absolute optical emission spectroscopy[J].Plasma Sources Science and Technology,2013,22(1):015011.
[26]Karakas E,Koklu M,Laroussi M.Correlation between helium mole fraction and plasma bullet propagation in low temperature plasma jets[J].Journal of Physics D:Applied Physics,2010,43(5):155202.
[27]Shashurin A,Keidar M.Experimental approaches for studying non-equilibrium atmospheric plasma jets[J].Physics of Plasmas,2015,22(12):122002.
[28]王立军,郑雅霜,王丹,等.N2含量对大气压He等离子射流特性影响的数值模拟研究[J].中国电机工程学报,2017,37(10):2816-2823.Wang Lijun,Zheng Yashuang,Wang Dan,et al.Numerical modeling of a helium atmospheric pressure jet with various amounts of N2 admixture[J].Proceedings of the CSEE,2017,37(10):2816-2823.
[29]Wang Yong,Li Cong,Shi Jielin,et al.Measurement of electron density and electron temperature of a cascaded arc plasma using laser Thomson scattering compared to an optical emission spectroscopic approach[J].Plasma Science and Technology,2017,19(11):115403.