摘要
应用于等离子体风洞、固废处理的电弧等离子体炬需要具备高功率、宽范围变功率、使用空气作为气体工质和电极寿命长的特点,针对基于这种需求设计的一种磁控双弧室空气等离子体炬展开实验研究,通过电特性实验和数据归纳获得了气流、电流和气流量分配比等参数对弧电压变化的影响规律与高精度的定量关系式。通过烧蚀实验研究了在不同的气流、电流和气流分配比条件下,弧斑在轴线上的运动规律,实验结果表明气体的流动状态决定了弧斑的轴向位置,改变流量分配系数能够明显改变内电极上弧斑在轴线上的位置。利用超高速相机拍摄了电弧周向运动过程,获得了电弧的周向转速,并通过图像分析获得了电弧稳定工作状态下存在的脉动和微小尺度分流过程和规律。
Direct-current arc plasma which is applied in plasma wind tunnel and solid waste disposal is required to possess the characteristics of high power, wide-range variable power, and long-life electrodes in air. To meet these requirements, we experimentally researched and designed a magnetic double-chamber air plasma torch.Based on electrical characteristic experiments and data, the influences of parameters such as current, gas flow rate and distribution ratio on arc voltage and the quantitative expression were acquired. The axial motion characteristic of the arc spot was investigated through the ablation traces on the internal face of electrodes under different currents, gas flow rates and distribution ratios. Results show that the flow condition can decide the arc root axial position, and the flow rate distribution can influence the arc root axial position of the inner electrode. Moreover, the circumferential motion of the arc was investigated by a high-speed camera. The circumferential rotation speed of certain condition was calculated and the rules of micro/small arc distributaries were captured and analyzed from images.
作者
曹亚文
韩先伟
谭畅
张志豪
李斌
CAO Yawen;HAN Xianwei;TAN Chang;ZHANG Zhihao;LI Bin(Science and Technology on Liquid Rocket Engine Laboratory,Xi’an Aerospace Propulsion Institute,Xi’an 710100,China;Shaanxi Key Laboratory of Plasma Physics and Applied Technology,Xi’an 710100,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2021年第3期832-839,共8页
High Voltage Engineering
基金
国家重点研发计划项目(2019YFC1907000)。
关键词
磁控双弧室
电弧等离子体
量纲分析
气动力
电弧分流
magnetic double-chamber
arc plasma
dimensional analysis
aerodynamic force
arc distributaries
