摘要
为了研究不同形状暴露电极下平板介质阻挡放电(surface dielectric barrier discharge,SDBD)优化结果,基于光强度与放电强度和电荷密度是正相关的原理,采用图像处理当中像素点灰度值处理办法,拟合了阶梯形、细丝形、锯齿形及长条形共4种电极形状暴露电极的平板上的光强分布。结果表明:4种暴露电极形状的放电光强均符合Gaussian分布,且电荷分布与之类似。暴露电极形状的改变对放电影响较大。相比正常的长条形电极,细丝电极放电更加剧烈,阶梯电极放电却有所减弱,锯齿电极在展向明显为非均匀放电,存在最强和最弱光强交替出现现象,且间距较为均匀。研究表明锯齿状电极和普通电极的最大不同之处在于可以诱导出三维方向上的射流;改变暴露电极形状,以弦向、展向形成尖端放电,或者电场叠加方式增加电场强度能够对SDBD起到一定的优化作用。
To obtain optimized results of SDBD（surface dielectric barrier discharge） exposed electrode with four shapes of ladder, thread, zigzag, and steamer, we studied the distribution of light intensity by using the pixel gray value approach in image processing and the principle that the light intensity is positively related with the discharge intensity and charge density. The results show that the discharge intensity distribution is consistent with the Gaussian distribution, and the charge distribution is similar too. Changing the shape of the electrode has a remarkable influence on discharge distribution. Elongated electrode will discharge more fiercely compared to the normal discharge electrode, but ladder electrode will discharge weakly. Zigzag electrode will distinctly non-uniformly discharge in span-wise direction, and there is a phenomenon that the strongest and lowest light intensity occurs alternately with uniformly spacing. It is revealed that jagged electrodes significantly has a dimensional effect. Therefore, it is shown that changing the shape of exposed electrode to form point discharge or superposing E-field to enhance electric intensity can optimize SDBD.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2016年第3期843-848,共6页
High Voltage Engineering
基金
国家自然科学基金(11205244)
高分专项青年创新基金(GFZX04060103)~~
关键词
光强分布
电极形状
灰度
表面介质阻挡放电
等离子体
高压放电
distribution of light intensity
shape of electrode
gray value
surface dielectric barrier discharge
plasma
discharge of high voltage
