真空弧阴极放电液滴光散射测量
On-Line Measurement of Vacuum Arc Cathode Discharge Droplet
孙存金 1苏格毅 1于海涛 2田昌 1董攀 3苏明旭1
作者信息
- 1. 上海理工大学能源与动力工程学院上海市动力工程多相流动与传热重点实验室,上海 200093
- 2. 上海理工大学理学院,上海 200093
- 3. 中国工程物理研究院流体物理研究所,四川 绵阳 621900
- 折叠
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1.55 μm、1.25 μm、1.15 μm、0.75 μm.实验结果可为研究真空弧阴极放电过程提供参考.
Abstract
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 0.75 μm,respectively.These experimental results serve as a valuable reference for further study of the vacuum arc cathode discharge process.
关键词
真空弧阴极/Mie散射/金属颗粒/粒径分布/在线测量Key words
vacuum arc cathode/Mie scattering/metal particles/particle size distribution/on-line measurement引用本文复制引用
基金项目
国家自然科学基金(51776129)
国家自然科学基金(11735012)
国家自然科学基金(11975217)
国家自然科学基金(52376162)
出版年
2024
NETL
NSTL
万方数据