三维静态锥体热源穿孔等离子弧焊接熔池的数值模拟  

Numerical simulation of fluid flow field in plasma arc welding with 3-D static conical heat source

作　　者：刘望兰[1] 胡绳荪[1] 马立[1] 

机构地区：[1]天津大学材料科学与工程学院,天津300072

出　　处：《焊接学报》2006年第6期33-36,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(50275106)

摘　　要：采用三维静态锥体热源对穿孔等离子弧焊接过程进行数值模拟。研究了三维锥体热源作用下焊接熔池流体流场、熔池内金属的流动方式以及熔池流体运动速度的变化。并与高斯热源条件下的模拟结果做比较。最后进行PAW焊接工艺试验,通过测量尾焰信号及焊缝尺寸等判断焊接熔池特征,将理论计算结果与试验测量值进行比较。Presuming a 3-D static conical heat source, the process of plasma arc welding is simulated with a computer.Using ANSYS, the three dimensional flow of the welding pool,the temperature fields and their transient variation processes are calculated,and the flow style and velocity of molten metal are investigated. Simulation with Gauss heat source is also done for comparison. Corresponding welding experiments such as terminal voltage signal and the dimension of weld size are measured to prove the reliability of the model.

关 键 词：穿孔等离子弧焊接 三维锥体热源 熔池 数值模拟 

分 类 号：TG402[金属学及工艺—焊接]