| 穿孔等离子弧焊接热场和流场的数值模拟 |
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| 引用本文： | 张涛,武传松.穿孔等离子弧焊接热场和流场的数值模拟[J].焊接学报,2011,32(7):87-90. |
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| 作者姓名： | 张涛 武传松 |
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| 作者单位： | 山东大学材料液固结构演变与加工教育部重点实验室, 济南 250061,山东大学材料液固结构演变与加工教育部重点实验室, 济南 250061 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 考虑熔池和小孔的耦合作用,建立了穿孔等离子弧焊接热过程的三维瞬态模型.采用焓孔隙度法处理了凝固熔化过程中相变潜热以及动量损耗问题.基于流体体积函数法（VOF）对小孔界面实施追踪.对等离子弧焊从小孔形成到穿孔的瞬态演变行为、熔池流场的动态变化过程进行了数值模拟.开展了穿孔等离子弧焊接试验,对数值模拟结果进行了试验验证.结...
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| 关 键 词： | 穿孔等离子弧焊接 小孔 流体流动 数值模拟 |
| 收稿时间： | 2011/2/7 0:00:00 |
Numerical simulation of temperature field and fluid flow in keyhole plasma arc welding |
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| ZHANG Tao and WU Chuansong.Numerical simulation of temperature field and fluid flow in keyhole plasma arc welding[J].Transactions of The China Welding Institution,2011,32(7):87-90. |
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| Authors: | ZHANG Tao and WU Chuansong |
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| Abstract: | With considering the coupled behaviors of weld pool and keyhole, a three-dimensional transient model of thermal process in keyhole plasma arc welding is established. The enthalphy-porosity technique is used to deal with latent heat and momentum loss during melting and solidification. The keyhole boundary is tracked by VOF method. The transient evolution of keyhole geometry from its establishment to its open status, and dynamic variation process of fluid velocity field in weld pool are computed. Keyhole plasma arc welding experiments were conducted to validate the predicted results. The results show that the magnitude of the simulated velocity corresponds to reality and the trend of the fusion line is close to the experiment. |
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| Keywords: | K-PAW keyhole fluid flow simulation |
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