| 固体表面激光加工熔池特性的数值分析 |
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| 引用本文： | 杨立新,彭晓峰.固体表面激光加工熔池特性的数值分析[J].应用基础与工程科学学报,2001,9(2):215-221. |
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| 作者姓名： | 杨立新 彭晓峰 |
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| 作者单位： | 清华大学热能工程系.北京,100084 |
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| 基金项目： | 国家自然科学基金(No.59625612)和清华大学博士论文基金资助项目 |
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| 摘 要： | 通过引入液相分数标量描述界面熔融区，能量方程中将潜热转换为热焓源项，而动量方程则引入‘Darcy’源项，由此建立统一的液和固相控制方程，实现在固定网格下求解具有移动界面的熔化和凝固过程．应用该模型详细分析不锈钢表面激光加工过程热传导、Marangoni和热浮力三种换热机制对熔化过程和熔池形状的影响．
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| 关 键 词： | 激光加工技术 熔池 数值分析方法 控制方程 高能束流加工技术 |
| 文章编号： | 1005-0930(2001)-02-03-0215-07 |
| 修稿时间： | 2001年3月5日 |
Numerically Modeling and Characteristics of Molten Pool During Laser Processing |
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| YANG Lixin,PENG Xiaofeng.Numerically Modeling and Characteristics of Molten Pool During Laser Processing[J].Journal of Basic Science and Engineering,2001,9(2):215-221. |
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| Authors: | YANG Lixin PENG Xiaofeng |
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| Abstract: | The article illustrates melting processes i n fixed meshes, based on mixture Continuity Equations, Momentum Equations an d Energy Equations for both liquid and solid phases by introducing scalar of liq uid fraction and applying source-based method. The model was applied to laser p rocessing of AISI 304 stainless steel. The effects of heat conduction, Marangoni flow and thermal buoyancy on melting process and shape of molten pool were anal yzed and physical fundament of laser processing were evidenced. |
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| Keywords: | melting laser marangoni flow numerical analysis |
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