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纵向磁场下GTAW电弧传热与流动数值模拟

刘政军 李宇航 苏允海

刘政军, 李宇航, 苏允海. 纵向磁场下GTAW电弧传热与流动数值模拟[J]. 焊接学报, 2019, 40(5): 120-125. doi: 10.12073/j.hjxb.2019400138
引用本文: 刘政军, 李宇航, 苏允海. 纵向磁场下GTAW电弧传热与流动数值模拟[J]. 焊接学报, 2019, 40(5): 120-125. doi: 10.12073/j.hjxb.2019400138
LIU Zhengjun, LI Yuhang, SU Yunhai. Numerical simulation of heat transfer and fluid flow for arc plasma in gas tungsten arc welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(5): 120-125. doi: 10.12073/j.hjxb.2019400138
Citation: LIU Zhengjun, LI Yuhang, SU Yunhai. Numerical simulation of heat transfer and fluid flow for arc plasma in gas tungsten arc welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(5): 120-125. doi: 10.12073/j.hjxb.2019400138

纵向磁场下GTAW电弧传热与流动数值模拟

doi: 10.12073/j.hjxb.2019400138
基金项目: 辽宁省自然科学基金资助项目(20072041);辽宁省教育厅基金资助项目(201124125)

Numerical simulation of heat transfer and fluid flow for arc plasma in gas tungsten arc welding

  • 摘要: 针对外加纵向磁场(LMF)下的焊接电弧的传热与流动特性,建立基于磁流体动力学的二维轴对称数学模型,将流体动力学理论与麦克斯韦方程组进行耦合对电弧的温度场、电势场、电弧压力以及电流密度等进行求解,又分别对磁感应强度为0与0.06 T下的阳极热进行定量分析与对比. 结果表明,外加LMF驱动带电粒子旋转并使电弧扩张,其中心出现负压并形成反重力流将阳极热汇聚于阴极附近,同时电弧因高速旋转增大热对流损失,降低焊接热效率.当磁感应强度为0.06 T时,阳极表面的电流密度、热流密度以及电弧压力等由中心分布转化为双峰分布模式.
  • [1] 罗键,贾昌申,王雅生,等.外加纵向磁场GTAW焊接机理I.电弧特性[J].金属学报, 2001, 37(2):212-216 Luo Jian, Jia Changshen, Wang Yasheng, et al. Mechanism of the gas tungsten-arc welding in longitudinal magnetic field controlling-I. Property of the arc[J]. Acta Metallurgica Sinica, 2001, 37(2):212-216
    [2] Tanaka M, Terasaki H, Ushio M, et al. A unified numerical modeling of stationary tungsten-inert-gas welding process[J]. Metallurgical and Materials Transactions A, 2001, 33(7):2043-2052.
    [3] Luo Jian, Yao Zongxiang, Xue Keliang. Anti-gravity gradient unique arc behavior in the longitudinal electric magnetic field hybrid tungsten inert gas arc welding[J]. International Journal of Advanced Manufacturing Technology, 2016, 84(1-4):647-661.
    [4] Yin Xianqing, Gou Jianjun, Zhang Jianxun, et al. Numerical study of arc plasmas and weld pools for GTAW with applied axial magnetic[J]. Journal of Physics D:Applied Physics, 2012, 45(28):5203-5300.
    [5] Chen Tang, Zhang Xiaoming, Bing Bai, et al. Numerical study of DC argon arc with axial magnetic fields[J]. Plasma Chemistry and Plasma Processing, 2015, 35(1):61-74.
    [6] Lu Shanping, Dong Wenchao, Li Dianzhong, et al. Numerical study and comparisons of gas tungsten arc properties between argon and nitrogen[J]. Computational Materials Science, 2009, 45(2):327-335.
    [7] Pan Jiajing, Yang Lijun, Hu Shengsun. Simulation and analysis of heat transfer and fluid flow characteristics of variable GTAW process based on a tungsten-arc-specimen couples model[J]. International Journal of Heat and Mass Transfer, 2016, 96:346-352.
    [8] 安滕宏平.焊接电弧现象[M].北京:机械工业出版社, 1985.
    [9] Boulos M I, Fauchais P, Pfender E. Thermal plasmas-fundamentals and applications[M]. New York:Springer, 1994.
    [10] Savas A, Ceyhun V. Finite element analysis of GTAW arc under different shielding gases[J]. Computational Materials Science, 2011, 51(1):53-71.
    [11] Zhou X, Heberlein J. An experimental investigation of factors affecting arc-cathode erosion[J]. Journal of Physics D:Applied Physics, 1998, 31(19):2577-2590.
    [12] Tanaka M, Lowke J J. Predictions of weld pool profiles using plasma physics[J]. Journal of Physics D:Applied Physics, 2007, 40(1):R1-R23.
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  • 收稿日期:  2018-01-21

纵向磁场下GTAW电弧传热与流动数值模拟

doi: 10.12073/j.hjxb.2019400138
    基金项目:  辽宁省自然科学基金资助项目(20072041);辽宁省教育厅基金资助项目(201124125)

摘要: 针对外加纵向磁场(LMF)下的焊接电弧的传热与流动特性,建立基于磁流体动力学的二维轴对称数学模型,将流体动力学理论与麦克斯韦方程组进行耦合对电弧的温度场、电势场、电弧压力以及电流密度等进行求解,又分别对磁感应强度为0与0.06 T下的阳极热进行定量分析与对比. 结果表明,外加LMF驱动带电粒子旋转并使电弧扩张,其中心出现负压并形成反重力流将阳极热汇聚于阴极附近,同时电弧因高速旋转增大热对流损失,降低焊接热效率.当磁感应强度为0.06 T时,阳极表面的电流密度、热流密度以及电弧压力等由中心分布转化为双峰分布模式.

English Abstract

刘政军, 李宇航, 苏允海. 纵向磁场下GTAW电弧传热与流动数值模拟[J]. 焊接学报, 2019, 40(5): 120-125. doi: 10.12073/j.hjxb.2019400138
引用本文: 刘政军, 李宇航, 苏允海. 纵向磁场下GTAW电弧传热与流动数值模拟[J]. 焊接学报, 2019, 40(5): 120-125. doi: 10.12073/j.hjxb.2019400138
LIU Zhengjun, LI Yuhang, SU Yunhai. Numerical simulation of heat transfer and fluid flow for arc plasma in gas tungsten arc welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(5): 120-125. doi: 10.12073/j.hjxb.2019400138
Citation: LIU Zhengjun, LI Yuhang, SU Yunhai. Numerical simulation of heat transfer and fluid flow for arc plasma in gas tungsten arc welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(5): 120-125. doi: 10.12073/j.hjxb.2019400138
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