电流参数变化对电弧温度场和速度场的影响  

Effect of current changes on velocity and temperature profiles of GTAW arc

作　　者：成满庆[1] 安艳丽[1] 杜华云[1] 卫英慧[1] 樊丁[2] 

机构地区：[1]太原理工大学材料科学与工程学院,太原030024 [2]兰州理工大学材料科学与工程学院,兰州730050

出　　处：《焊接学报》2010年第4期33-37,共5页Transactions of The China Welding Institution

基　　金：山西省自然科学基金资助项目(20051050);太原市科技计划资助项目(08121018);太原市创新人才计划资助项目(01922034)

摘　　要：基于自由燃烧的钨极氩弧焊电弧的传热和流体流动,建立了二维稳态的轴对称模型.在此基础上对电流参数改变所引起的电弧热物理过程进行了计算,得出了改变电流参数条件下电弧温度场和速度场的分布,并分析比较了计算结果.结果表明,电流的增加引起了电弧输入能量的增加,带来了电弧整体参数的提高,与经典电弧理论基本吻合.方程的求解采用的是以SAMPLE算法为基础编写的通用热流计算软件PHOE-NICS(parabolic hyperbolic or elliptic numerical integration code series).A steady two-dimensional axisymmetric model was developed in order to investigate heat and fluid flows in a free burning GTAW arc.The velocity and temperature profiles of the arc on the conditions of different currents were simulated,and the calculated results were compared.The conclusion is that with the increasing of the arc current,the energy transferred to the arc increases also,and all the parameters in the arc enhance,which are well consistent with classical arc theory.The control equations are solved by using a general thermo-fluid-mechanics computer program,PHOENICS（parabolic hyperbolic or elliptic numerical integration code series）code,which is based on the SAMPLE algorithm.

关 键 词：电弧 数值模拟 改变电流 

分 类 号：TG402[金属学及工艺—焊接]