【作者】 王春艳； 孙晶； 孟建兵； 徐文骥；

【Author】 Wang Chunyan,Sun Jing,Meng Jianbing,Xu Wenji

【机构】 大连理工大学机械工程学院；

【摘要】 借助光学透镜、中性密度滤光片、窄带干涉滤光片和CCD构建等离子体弧图像采集系统,并获得外加横向交变磁场作用前后的等离子体弧图像。在对上述两种图像进行去除噪声和形态特征增强处理的基础上,对比分析横向交变磁场作用前后的等离子体弧射流特性。结果表明,横向交变磁场可有效控制等离子体弧的形态和位置,等离子体弧在横向交变磁场作用下,产生摆动、分布范围增大、热流密度梯度减小。更多还原

【Abstract】 An image collection system is designed with a lens,a neutral filter,an interference filter and a CCD camera to obtain the images of plasma arc with and without external transverse alternating magnetic field.On the basis of removing noise and enhancing morphological characteristics of above images,the characteristics of plasma arc with and without external transverse alternating magnetic field are analyzed comparatively.The results show that it is feasible to control the shape and heat flux density of plasma arc.The external transverse alternating magnetic field leads to the plasma arc swing,which can expand the area of plasma arc thermal treatment and flatten the heat flux density upon the workpiece.更多还原