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激光熔凝温度场的数值计算
引用本文:刘振侠,黄卫东,等.激光熔凝温度场的数值计算[J].西北大学学报,2001,31(3):199-202.
作者姓名:刘振侠  黄卫东
作者单位:西北工业大学凝固技术国家点实验室,陕西西安710072
基金项目:国家自然科学基金资助项目(59771054);航空基金资助项目(97z53002)。
摘    要:利用激光圆形光斑对和性的特点,建立了激光表面快速熔凝条件下温度的二维数值模型,边界条件点源模型推导,同时采用SIMPLE算法进行计算,在保证精度的条件下简化了计算(相对于三维),计算结果与实验结果吻合良好,表明这种算法在一定条件下能够凝确的反映激光表面熔凝过程中,熔池纵截面的温度场信息及激光和理熔过程中生长界面的形态。

关 键 词:激光熔凝  熔池  温度场  点源法  数值计算  SIMPLE算法  凝固组织
文章编号:1000-274X(2001)04-0199-04
修稿时间:2000年6月9日

The numerical simulation of temperature fields of laser molten pool
LIU Zhen xia ,HUANG Wei dong,YANG Sen,LIU Jian rui.The numerical simulation of temperature fields of laser molten pool[J].Journal of Northwest University(Natural Science Edition),2001,31(3):199-202.
Authors:LIU Zhen xia  HUANG Wei dong  YANG Sen  LIU Jian rui
Institution:LIU Zhen xia 1,HUANG Wei dong,YANG Sen,LIU Jian rui
Abstract:Based on symmetry of the circular light spot of the laser, a two dimensional numerical simulation of temperature fields of laser molten pool has been developed.The point source model is used to deduce the boundary condition, and SIMPLE method is used to do the calculation.Under the condition that the precision is assured, the calculation has been simplified (compared with three dimensional model). The comparison between the calculation results and the experimental results indicates that the temperature fields information of the longitudinal section along the scanning trace of the laser molten pool got by this method is coincident with the experiment and useful to predict the microstructure.
Keywords:laser molten pool  temperature fields  point source model  boundary condition
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