基于FLUENT的TIG焊瞬态熔池三维形态的数值模拟  

Numerical simulation of transient three-dimensional shape of TIG weld pools based on FLUENT

作　　者：袁尤智[1] 刘南生[1] 汪岩峰[1] 

机构地区：[1]南昌大学理学院,南昌330031

出　　处：《焊接学报》2009年第12期53-56,60,共5页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(50565003);江西省科技厅重大科技攻关资助项目(Z03388)

摘　　要：根据流体力学和传热学原理,建立了TIG焊瞬态熔池三维数值分析模型.电弧热源模型采用典型的高斯热源分布模型,模型考虑熔池液态金属对流传热、熔池外工件的固态导热、焊接过程中的相变潜热、熔池流体的紊流特性、材料的热物理性能参数随温度变化等因素.用enthalpy-porosity方法处理工件熔化/凝固过程中的问题,FLUENTRNGk-ε湍流模型对TIG焊熔池模型进行求解.给出了熔池形状的可视化图形结果,熔池形状特征参数随时间的动态变化.结果表明,计算值与实测值吻合良好.Based on theories of fluid dynamics and heat transfer,a transient three-dimensional model of TIG weld pools is established,in which Gaussian distribution is used to describe the heat flux source of arc.Many factors are considered in the model including the convective heat transfer of liquid metal and the heat conduction of solid metal,latent heat in welding process,the turbulence characteristics of welding pool fluid,material thermo physical properties as the function of temperature and so on.The enthalpy-porosity technology is adopted to solve the problem with workpiece phase transformation.The graphics results of weld pools and the variation of shape parameters with time are given by using FLUENT RNG k-ε model to calculate the TIG wielding pool.The experiments show that the calculated results agree well with measured value.

关 键 词：熔池温度场 熔池形态 湍流 数值模拟 

分 类 号：TG402[金属学及工艺—焊接]