• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ISIJ international >Arc Behaviour and Cathode Melting Process during VAR: an Experimental and Numerical Study
【24h】

Arc Behaviour and Cathode Melting Process during VAR: an Experimental and Numerical Study

机译：VAR期间的电弧行为和阴极熔化过程：实验和数值研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The present study aims to understand the melting of the consumable electrode in the VAR process and gain some insight into the influence of an ensemble arc motion on the melting behaviour. In a previous study, a 2D axisymmetric model of the heat transfer in the cathode had been developed. Using the operating parameters as model inputs, it enabled prediction of the melt rate and the evolution of the melting area. Model results were successfully compared to melt rate measurements in an industrial VAR furnace. In recent years, it has been claimed that the electric arc may not be considered as steady and axisymmetric. Our experimental investigation of the luminosity recorded during an actual VAR heat confirms that a transient 3D behaviour may take place. Therefore, a 3D version of the previous model was set up to predict the heat transfer and melting of the electrode, using the unknown ensemble arc motion as an input. The arc is assimilated to a transient distribution of energy flux density. Results evidence that the influence of the arc motion on the shape of the electrode tip can be very important. In industrial practice, the cathode tip usually remains relatively flat during melting. The shapes of the computed electrode tips enable us to propose some arc parameters which remain compatible with both the periodic behaviour of the light emitted and the flatness of the electrode.
机译：本研究旨在了解自耗电极在VAR过程中的熔化，并获得整体电弧运动对熔化行为的影响的一些见解。在先前的研究中，已经开发了阴极传热的二维轴对称模型。使用操作参数作为模型输入，可以预测熔解速率和熔解区域的演变。模型结果已成功与工业VAR炉中的熔体速率测量进行了比较。近年来，已经声称电弧可能不被认为是稳定且轴对称的。我们对实际VAR加热期间记录的光度的实验研究证实，可能会发生瞬时3D行为。因此，使用未知的整体电弧运动作为输入，建立了先前模型的3D版本以预测电极的传热和熔化。电弧被吸收为能量通量密度的瞬态分布。结果证明，电弧运动对电极头形状的影响可能非常重要。在工业实践中，阴极尖端在熔化期间通常保持相对平坦。计算出的电极尖端的形状使我们能够提出一些电弧参数，这些参数与发射的光的周期性行为和电极的平坦度保持兼容。

著录项

  • 来源
    《ISIJ international》 |2013年第2期|213-220|共8页
  • 作者

    Alain JARDY; Pierre CHAPELLE; Ashish MALIK; Jean-Pierre BELLOT; Herve COMBEAU; Bernard DUSSOUBS;

  • 作者单位

    Institut Jean Lamour - UMR 7198 CNRS/Universite de Lorraine, Departement SI2M Ecole des Mines, Pare de Saurupt, CS 14243, F-54042 Nancy Cedex, France;

    Institut Jean Lamour - UMR 7198 CNRS/Universite de Lorraine, Departement SI2M Ecole des Mines, Pare de Saurupt, CS 14243, F-54042 Nancy Cedex, France;

    Institut Jean Lamour - UMR 7198 CNRS/Universite de Lorraine, Departement SI2M Ecole des Mines, Pare de Saurupt, CS 14243, F-54042 Nancy Cedex, France;

    Institut Jean Lamour - UMR 7198 CNRS/Universite de Lorraine, Departement SI2M Ecole des Mines, Pare de Saurupt, CS 14243, F-54042 Nancy Cedex, France;

    Institut Jean Lamour - UMR 7198 CNRS/Universite de Lorraine, Departement SI2M Ecole des Mines, Pare de Saurupt, CS 14243, F-54042 Nancy Cedex, France;

    Institut Jean Lamour - UMR 7198 CNRS/Universite de Lorraine, Departement SI2M Ecole des Mines, Pare de Saurupt, CS 14243, F-54042 Nancy Cedex, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    vacuum arc remelting; cathode melting; ensemble arc motion; numerical simulation;

    机译：真空电弧重熔;阴极熔化合弧运动;数值模拟;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号