【作者】 张琦； 郑志镇； 李建军；

【Author】 Zhang Qi;Zheng Zhi-zhen;Li Jian-jun;Huazhong University of Science and Technology;

【机构】 华中科技大学；

【摘要】 微束等离子弧具有弧柱温度高、稳定性好、热量集中、热能密度大,弧柱细长且挺直度好等特点,将其应用于模具表面改性将有很大的应用潜力。本文结合真实环境下的实验参数,采用商业仿真软件COMSOL对100mA小电流微束等离子弧进行数值模拟,通过施加边界条件,求解流动场、电磁场、传热场及其相互耦合下作用的控制方程组,获得微束等离子弧的温度场,速度场及电磁力的分布信息。使用光谱仪采集微束等离子弧的轴向光谱信息,通过Boltzmann作图法将光谱信息转化为温度场信息,与仿真结果进行比对,验证了模型的正确性。更多还原

【Abstract】 Micro-beamed plasma has good characteristics such as high beam temperature, good stability, concentrated heat flux, large heat density, long and thin outline with straight degree. So it has a bright future to be applied in surface modifacation of die steel. This paper combined with real experimental parameters and simulated the model under current of 100 mA with C O M S O L. Through solving flow field equation, heat transferred equation, electromagnetic equation and other boundary equations, the temperature field and velocity distribution of micro-beamed plasma were obtained. Axial spectrum information was collected by a spectrometer and turned into temperature field information through Boltzmann plot method. Experimental and simulation results were compared to verify the correctness of the numerical model.更多还原