螺旋针-环结构等离子体射流放电过程分析
发布时间：2018-09-01 06:42
【摘要】：为降低气体的击穿和维持电压,设计一种螺旋针-环电极结构的等离子体射流装置,研究不同电压下的放电电压、电流波形。研究表明,氦气等离子体射流放电可以分为电晕放电、介质阻挡放电和射流放电三个阶段,并且可以通过放电电压、电流波形的特征进行区分。分析可知,射流管管径较大时,采用螺旋针状内电极结构可以减小电极间的平均气体间隙距离,从而降低气体的击穿和维持电压,使放电更加容易进行;电压反向过程中残留电荷使得合成电场得到加强,气体将"提前"发生放电;由于电极结构的不对称,气体在正半周期更容易发生放电,放电产生的电流脉冲数目更多,电流值更大;随着外加电压增大至14k V,放电最终过渡到丝状放电状态。
[Abstract]:In order to reduce the breakdown and maintain voltage of gas, a plasma jet device with helical needle and ring electrode structure was designed to study the discharge voltage and current waveform at different voltages. The results show that the discharge of helium plasma jet can be divided into three stages: corona discharge dielectric barrier discharge and jet discharge and can be distinguished by the characteristics of discharge voltage and current waveform. The analysis shows that when the diameter of the jet tube is large, the average gas gap distance between electrodes can be reduced by using the spiral needle internal electrode structure, thus the breakdown and maintenance voltage of the gas can be reduced, and the discharge can be more easily carried out. The residual charge in the voltage reverse process strengthens the synthetic electric field, and the gas will discharge "ahead". Because of the asymmetry of the electrode structure, the gas will discharge more easily in the positive half cycle, and the discharge will produce more current pulses. With the increase of applied voltage to 14kV, the discharge will transition to filamentous discharge state.
【作者单位】： 清华大学深圳研究生院;国网山东省电力公司电力科学研究院;
【基金】：国家自然科学基金资助项目(51677105)
【分类号】：O53
，
本文编号：2216426
[Abstract]:In order to reduce the breakdown and maintain voltage of gas, a plasma jet device with helical needle and ring electrode structure was designed to study the discharge voltage and current waveform at different voltages. The results show that the discharge of helium plasma jet can be divided into three stages: corona discharge dielectric barrier discharge and jet discharge and can be distinguished by the characteristics of discharge voltage and current waveform. The analysis shows that when the diameter of the jet tube is large, the average gas gap distance between electrodes can be reduced by using the spiral needle internal electrode structure, thus the breakdown and maintenance voltage of the gas can be reduced, and the discharge can be more easily carried out. The residual charge in the voltage reverse process strengthens the synthetic electric field, and the gas will discharge "ahead". Because of the asymmetry of the electrode structure, the gas will discharge more easily in the positive half cycle, and the discharge will produce more current pulses. With the increase of applied voltage to 14kV, the discharge will transition to filamentous discharge state.
【作者单位】： 清华大学深圳研究生院;国网山东省电力公司电力科学研究院;
【基金】：国家自然科学基金资助项目(51677105)
【分类号】：O53
，
本文编号：2216426
本文链接：https://www.wllwen.com/kejilunwen/wulilw/2216426.html
