钨极高压微电弧温度模型的建立与验证
Temperature Modeling and Verification of High-voltage Micro-arc with a Tungsten Electrode
李瑞君 1赵亮 1姚攀 1王勇俊 1杨晓婷 1夏果 1程真英1
作者信息
- 1. 合肥工业大学仪器科学与光电工程学院,合肥,230009
- 折叠
摘要
为提高一体式微球形钨探针的制备成功率,对制备过程中高压微电弧进行了研究.建立了钨极高压微电弧的多物理场耦合仿真模型以计算电极间距在0.5～2.0 mm、电压在1～12 kV时的电弧温度分布;然后对仿真结果进行最小二乘拟合,进而得到了电弧温度与放电参数之间的数学模型;最后,基于Boltzmann作图法搭建了光谱测温系统,并对数学模型进行了验证.研究结果表明:电弧呈椭球形分布,近阳极区存在高温屏障,阳极温度远低于阴极温度;电弧温度与电压、电极间距之间均为类抛物线性关系;模型计算结果与实验结果的平均相对误差为3.3％.该模型可用于计算电弧温度,从而实现钨探针的可控制备.
Abstract
In order to improve the success rate of the preparation of monolithic micro tungsten ball tips,the high-voltage micro-arc was studied during the preparation processes.A multi-physics field coupled simulation model of tungsten-pole high-voltage micro-arc was established to calculate the arc temperature distribution at electrode spacing of 0.5～2.0 mm and voltage of 1～12 kV.The simulation results were then subjected to least-squares fitting,and a mathematical model between the arc tem-perature and the discharge parameters was obtained.Finally,the mathematical model was validated by building a spectral temperature measurement system based on the Boltzmann graphing method.The results show that the arc is elliptically distributed,and there is a high temperature barrier in the near-anode region,and the anode temperature is much lower than that of the cathode temperature.The arc temperature has a parabolic relationship with the voltage and electrode spacing.The average relative error between the model calculation results and the experimental results is as 3.3％.The model may be used to calculate the arc temperature for controlled preparation of the tungsten ball tips.
关键词
电弧温度/磁流体动力学/Boltzmann作图法/微球形钨探针Key words
arc temperature/magnetogas dynamics/Boltzmann graphing method/micro tungsten ball tip引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据