首页> 中文期刊> 《钢铁研究学报(英文版)》 >Simulation of Gas Flow Field in Laval Nozzle and Straight Nozzle for Powder Metallurgy and Spray Forming

Simulation of Gas Flow Field in Laval Nozzle and Straight Nozzle for Powder Metallurgy and Spray Forming

         

摘要

Gas flow field in nozzles and out of nozzles was calculated for Laval orifice and straight orifice nozzles.The results showed that the flow generated by the Laval nozzle had a higher exit velocity in the vicinity of the nozzle,in comparison with that of the straight nozzle,that is to say,a Laval nozzle was more efficient than a straight one in disintegrating the melt stream and was apt to produce finer powders.The flow generated by the Laval nozzle was less convergent and the velocity gradient along the radial direction was more moderate than that of a straight nozzle,which could contribute to a broad distribution of melt particles.According to their flow characteristics,the Laval nozzle was reckoned as a better choice of producing larger spray-formed billets.

著录项

  • 来源
    《钢铁研究学报(英文版)》 |2008年第6期|44-47|共4页
  • 作者单位

    National Key Laboratory of High Temperature Structural Materials,Beijing Institute of Aeronautical Materials,Beijing 100095,China;

    National Key Laboratory of High Temperature Structural Materials,Beijing Institute of Aeronautical Materials,Beijing 100095,China;

    National Key Laboratory of High Temperature Structural Materials,Beijing Institute of Aeronautical Materials,Beijing 100095,China;

    National Key Laboratory of High Temperature Structural Materials,Beijing Institute of Aeronautical Materials,Beijing 100095,China;

    National Key Laboratory of High Temperature Structural Materials,Beijing Institute of Aeronautical Materials,Beijing 100095,China;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 金属学与热处理;
  • 关键词

    numerical simulation; computational fluid dynamics; gas flow field; atomization nozzle;

    机译:数值模拟;计算流体力学;气流场;雾化喷嘴;
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