摘要
为研究交流旋转滑动弧的滑动模式、伏安特性和发光强度,对大气压交流驱动下的旋转滑动弧放电进行了电信号测量与图像采集。研究结果表明：旋转滑动弧在整个放电的过程中存在两种滑动模式,分别为击穿伴随滑动（B-G）模式和稳定滑动（A-G）模式,B-G模式的电流峰值在1～40 A之间变化,为安培量级,A-G模式的电流峰值在-900～900 mA之间变化,为毫安量级,并且电弧的滑动模式受电压与气流量的影响;交流旋转滑动弧放电过程中电弧从产生到熄灭满足交流电弧零休、燃弧、熄弧的整个物理过程,采用分段拟合的数学方法对伏安特性曲线进行描述,发现在放电的正半周期,电弧的零休阶段U与I满足阶跃函数特征;电弧稳定燃烧阶段中,电弧电流增加的过程U与I满足反比例函数特征;电弧电流减小的过程U与I满足一次函数特征。放电的负半周期U与I满足的数学函数特征与正半周期类似,但伏安特性曲线关于原点并不对称;电弧发光强度分布不均匀,最强的区域始终位于阴极电弧根部。
In order to study the electrical characteristics and arc gliding modes of AC rotating gliding arc discharge, we measured the electrical signal and took discharge images of rotating gliding arc discharge by AC powered under atmospheric pressure. The results show that there are two kinds of gliding modes in the whole discharge process, namely, the Steady Arc Gliding（A-G） mode and Breakdown Gliding（B-G） mode. The current peak in the B-G mode varies between 1 and 40 A, belonging to the ampere-class, and the current peak in A-G mode varies between negative 900 mA and positive 900 mA, belonging to the milliampere-class. The sliding mode of the arc is affected by the voltage and air flow. The process from arc generation to extinguishment is consistent with the physical process of arc approaching ‘zero＇ duration, arc burning, and arc extinction. In addition, after describing the voltage-current characteristics by segmentation fitting, we find that the U-I curve in the zero-off phase of the arc in the positive half-cycle of the discharge satisfies the step function. During the process of increasing arc current in the arc stabilized combustion stage, the U-I curve satisfies the inverse proportional function. In the process of reducing arc current, the U-I curve satisfies the linear function. The U-I curve of the negative half cycle of the discharge satisfies the mathematical function characteristic similar to the positive half cycle, but the voltammetric characteristic curve is not symmetrical about the origin. Finally, the discharge images show that the region of the strongest arc emission intensity is always located at the cathode of the root arc.
作者
鲁娜
孙丹凤
王冰
李杰
吴彦
LU Na;SUN Danfeng;WANG Bing;LI Jie;WU Van(School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China;Communications Research Institute of Liaoning Province, Shenyang 110015, China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2018年第6期1930-1937,共8页
High Voltage Engineering
基金
国家自然科学基金(U1462105)
辽宁省自然科学基金(2015020610)~~
关键词
交流旋转滑动弧
滑动模式
A-G模式
B-G模式
伏安特性
发光强度
AC rotating gliding arc
gliding modes
A-G mode
B-G mode
voltage-current characteristics
emission in-tensity
作者简介
鲁娜（通信作者）1979-，女，博士，副教授，博导研究方向为环境等离子体催化技术E-mail：lima@dlut．edu．cn
