气流速度对大气压氦气介质阻挡放电特性的影响  

Influence of Gas Flow on the Characteristics of Dielectric Barrier Discharge in Helium at Atmospheric Pressure

作　　者：黄寅 孟永鹏[1] 梅磊 马延昊 吴锴[1] HUANG Yin;MENG Yongpeng;MEI Lei;MA Yanhao;WU Kai(State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,西安710049

出　　处：《高电压技术》2022年第7期2737-2746,共10页High Voltage Engineering

基　　金：国家自然科学基金(51677143,52130703)。

摘　　要：气体流动是介质阻挡放电工业应用中的影响因素之一,明晰气流与放电之间的相互作用机制有助于寻找更适合工业生产的实验条件。为此,通过建立高时间分辨率的大气压介质阻挡放电测量系统,探究了氦气流对放电形式演化以及电流脉冲幅值、放电量、放电相位延迟等放电特性的影响。研究发现:在外加电压从零开始增加时,在放电间隙中引入2 L/min(对应实际气流速度v=0.111 m/s)气流降低了放电发生的起始电压并促进放电形式由柱状放电向丝状放电演化。在固定的外加电压条件下,增加气流速度会改变放电气隙中带电粒子的分布,使得放电的均匀性提高,从而影响放电形式与放电特性。在5 L/min(v=0.278 m/s)气流体积流量下,放电产生的带电粒子将被带出放电间隙,放电形式由柱状放电演化为均匀放电。Gas flow is one of the influencing factors in the industrial application of dielectric barrier discharge.Clarifying the interaction mechanism between gas flow and discharge can help to find more suitable experimental conditions for industrial production.Consequently,a high temporal resolution dielectric barrier discharge measuring system is established to explore the influence of helium gas flow on the evolution of the discharge form,as well as the current pulse amplitude,discharge volume,discharge phase and other discharge characteristics.It is found that the introduction of 2 L/min(corresponding actual airflow velocity v=0.111 m/s)gas flow in the discharge gap will reduce the initial voltage of the discharge and promote the transformation of the discharge form from columnar discharge to filamentary discharge.Under the condition of a fixed applied voltage,the increase of gas flow velocity will change the distribution of charged particles in the discharge air gap and improve the uniformity of the discharge,thereby affecting the discharge form and discharge characteristics.At the gas flow velocity of 5 L/min(v=0.278 m/s),the charged particles produced by the discharge will be taken out of the discharge gap,and the discharge form will evolve from columnar discharge to uniform discharge at this time.

关 键 词：气流速度 介质阻挡放电 放电形式 大气压氦气 放电特性 

分 类 号：O461[理学—电子物理学]