摘要
对真空弧放电过程金属液滴进行测量,提出一种基于Mie散射理论在线测量方法。以650 nm红光激光器为光源,并搭配相机同步控制装置,搭建真空弧金属液滴在线测量系统,利用非独立模式差分进化算法反演出颗粒粒径分布。通过4种聚苯乙烯乳胶球标准颗粒实验对测量系统准确性进行验证,测量误差在5%以内;在不同放电电流、放电脉宽条件下对4种阴极金属材料的金属液滴进行在线测量。测量结果表明:对于同种金属,放电脉宽或放电电流的增大对金属液滴粒径大小影响不明显;相同放电电流和放电脉宽下,阴极金属的材料对粒径分布具有明显影响,同一工况下铝、铁、钛、钼液滴中位径分别为1.55μm、1.25μm、1.15μm、0.75μm。实验结果可为研究真空弧阴极放电过程提供参考。
The study presents a method for online measurement of metal droplets during vacuum arc discharge,based on Mie scattering theory.A vacuum arc metal droplet online measurement system is constructed using a 650-nm red laser as the light source and a camera-synchronous control device.The particle size distribution is inverted using a nonindependent mode differential evolution algorithm.The accuracy of the measurement system was validated through experiments with four types of polystyrene latex ball standard particles,showcasing a measurement error within 5%.Further,online measurements of metal droplets were conducted using four different cathode metal materials under varying discharge currents and pulse widths.The findings suggest that for a given metal,alterations in discharge pulse width or discharge current do not remarkably affect the size of the metal droplets.Conversely,under identical discharge current and pulse width conditions,the material of the cathode metal markedly influences the particle size distribution.Specifically,under the same operational conditions,the median sizes of aluminum,iron,titanium,and molybdenum droplets are 1.55,1.25,1.15,and 0.75μm,respectively.These experimental results serve as a valuable reference for further study of the vacuum arc cathode discharge process.
作者
孙存金
苏格毅
于海涛
田昌
董攀
苏明旭
Sun Cunjin;Su Geyi;Yu Haitao;Tian Chang;Dong Pan;Su Mingxu(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai KeyLaboratory of Multiphase Flow and Heat Transfer in Power Engineering,Shanghai 200093,China;College of Science,University of Shanghai for Science and Technology,Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,Shanghai 200093,China;Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621900,Sichuan,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2024年第15期148-154,共7页
Laser & Optoelectronics Progress
基金
国家自然科学基金(51776129,11735012,11975217,52376162)。
关键词
真空弧阴极
MIE散射
金属颗粒
粒径分布
在线测量
vacuum arc cathode
Mie scattering
metal particles
particle size distribution
on-line measurement
