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金属学报  1999 

激光熔覆溶池二维准稳态流场及温度场的数值模拟

, PP. 604-610

Keywords: 激光熔覆,自由表面,温度场,温度场,速度场

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Abstract:

本文建立了二维准稳态激光熔覆熔池流场及温度场的数值模型,除考虑对流换热外,模型还考虑了局部大变形自由表面,在贴体正交曲线坐标系下采用了非正交错网格SIMPLE算法离散求解动量方程,计算出了激光熔覆熔池自由表面形状和温度场,速度场及局部特征凝固参数,数值结果表明,表面张力温度系数αγ/αT和扫描速率u0对熔池自由表面形状及熔池内温度分布,速度分布有重要影响.

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