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气体流量和耦合度对GPCA-TIG焊电弧特性影响的数值模拟

黄勇, 陆肃中, 王新鑫, 李慧

黄勇, 陆肃中, 王新鑫, 李慧. 气体流量和耦合度对GPCA-TIG焊电弧特性影响的数值模拟[J]. 焊接学报, 2016, 37(6): 69-74.
引用本文: 黄勇, 陆肃中, 王新鑫, 李慧. 气体流量和耦合度对GPCA-TIG焊电弧特性影响的数值模拟[J]. 焊接学报, 2016, 37(6): 69-74.
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HUANG Yong, LU Suzhong, WANG Xinxin, LI Hui. Numerical simulation on effect of outer layer gas flow rate and coupling degree on arc characteristics of GPCA-TIG welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(6): 69-74.
Citation: HUANG Yong, LU Suzhong, WANG Xinxin, LI Hui. Numerical simulation on effect of outer layer gas flow rate and coupling degree on arc characteristics of GPCA-TIG welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(6): 69-74.
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气体流量和耦合度对GPCA-TIG焊电弧特性影响的数值模拟

  • 兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室, 兰州 730050

基金项目: 国家自然科学基金资助项目（51265029）

Numerical simulation on effect of outer layer gas flow rate and coupling degree on arc characteristics of GPCA-TIG welding

  • State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China

摘要

    摘要
  • 摘要: 根据磁流体动力学理论和组分守恒建立气体熔池耦合活性TIG焊电弧二维数学模型，采用简化阴极边界层模型将阴极与电弧耦合求解，计算得到了不同外层氧气流量与耦合度下电弧等离子的温度、氧气分布、阳极表面电流密度和热流密度等特征参数。结果表明，与TIG电弧相比，气体熔池耦合活性TIG电弧收缩，流速增大，阳极表面电弧压力升高；增大外层氧气流量或增大耦合度，电弧最高温度均上升，氧气向电弧区域扩散趋势更明显，电弧形貌略有收缩，阳极表面电流密度与热流峰值均略有增大。
    Abstract: A two-dimensional axisymmetric model for Gas Pool Coupled Activating TIG welding is established based on the MHD theory and species conservation. Arc plasma coupled with cathode is numerically simulated by simplified cathode sheath model. By solving this model, the distributions of temperature, oxygen, current density and heat flux at anode surface under different outer layer gas flow and coupling degree are obtained. The results show that the arc of gas pool coupled activating TIG welding constricts, the velocity of plasma and arc pressure at anode surface increase compared with TIG arc under the same conditions. Increasing the flow rate of oxygen or the coupling degree, the maximum temperature of arc rises, the trend of oxygen diffuses into arc is more obvious, the welding arc constricts slightly, the peak values of current density and heat flux at anode surface all increase.
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    • 参考文献(14)
  • [1] 黄 勇, 刘瑞琳, 樊 丁, 等. 气体熔池耦合活性TIG焊方法[J]. 焊接学报, 2012, 33(9): 13-16. Huang Yong, Liu Ruilin, Fan Ding, et al. Gas pool coupled activating welding method [J]. Transactions of the China Welding Institution, 2012, 33(9): 13-16.
    [2] 黄 勇, 王艳磊, 张治国. 氮氧元素联合过渡对气体熔池耦合活性TIG焊电弧的影响[J]. 焊接学报, 2015, 36(3): 31-34. Huang Yong, Wang Yanlei, Zhang Zhiguo. The effect of introduction of nitrogen in conjunction with oxygen on the welding arc of Gas Pool Coupled Activating TIG[J]. Transactions of the China Welding Institution, 2015, 36(3): 31-34.
    [3] 黄 勇, 王艳磊, 张治国. 氮氧元素联合过渡对GPCA-TIG焊焊缝的影响[J]. 焊接学报, 2015, 36(4): 1-4. Huang Yong, Wang Yanlei, Zhang Zhiguo. Effect of nitrogen in conjunction with oxygen on GPCA-TIG weld[J]. Transactions of the China Welding Institution, 2015, 36(4): 1-4.
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    [13] 黄 勇, 王艳磊, 张治国. 氧引入对气体熔池耦合活性TIG焊电弧的影响[J]. 光谱学与光谱分析, 2014, 34(5): 1168-1171. Huang Yong, Wang Yanlei, Zhang Zhiguo. Impact of induction of O2 on the welding arc of gas pool coupled activating TIG [J]. Spectroscopy and Spectral Analysis, 2014, 34(5): 1168-1171.
    [14] 董文超. 高效率TIG焊数值模拟与熔池形貌演变研究[D]. 中国科学院金属研究所, 2009.
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  • 收稿日期:  2014-09-15

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