东北大学学报(自然科学版) ›› 2024, Vol. 45 ›› Issue (9): 1252-1257.DOI: 10.12068/j.issn.1005-3026.2024.09.005

• 材料与冶金 • 上一篇    

基于CFD的EIGA导流管伸出长度的优化研究

郭快快1,2, 李建中1, 刘常升3()   

  1. 1.东北大学 冶金学院,辽宁 沈阳 110819
    2.中国科学院 金属研究所,辽宁 沈阳 110016
    3.东北大学 材料科学与工程学院,辽宁 沈阳 110819
  • 收稿日期:2023-05-29 出版日期:2024-09-15 发布日期:2024-12-16
  • 通讯作者: 刘常升
  • 作者简介:郭快快(1989-),男,河南平顶山人,中国科学院金属研究所博士后研究人员
    刘常升(1963-),男,内蒙古奈曼旗人,东北大学教授,博士生导师.
  • 基金资助:
    常州市科技支撑计划(工业)(CE20220044)

Optimization Study on Protrusion Length of Delivery Tube in EIGA Based on CFD

Kuai-kuai GUO1,2, Jian-zhong LI1, Chang-sheng LIU3()   

  1. 1.School of Metallurgy,Northeastern University,Shenyang 110819,China
    2.Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China
    3.School of Material Science & Engineering,Northeastern University,Shenyang 110819,China. cn
  • Received:2023-05-29 Online:2024-09-15 Published:2024-12-16
  • Contact: Chang-sheng LIU
  • About author:LIU Chang-sheng,E-mail:csliu@mail.neu.edu.

摘要:

采用CFD(computational fluid dynamics)数值模拟的方法,对电极感应熔炼气雾化(electrode induction melting gas atomization, EIGA)导流管不同伸出长度进行模拟计算,分析了导流管伸出长度对流场结构和粉末粒径的影响规律.结果表明,导流管伸出长度为0 mm时,回流区内的速度最大值为335 m/s,气体出口处的膨胀波簇明显变大,会出现反喷现象.随着导流管伸出长度的增加(1~4 mm),回流区的长度逐渐增加,且所制备的合金粉末的平均粒径先减小后增大.导流管伸出长度为2和3 mm时,抽吸压力最大,利于液滴二次破碎.导流管伸出长度为2 mm时,粉末粒径分布均表现为单峰的正态分布形态,粉末的中位粒径d50为84 μm,粒径分布最均匀,粒径范围最窄.

关键词: 电极感应熔炼气雾化(EIGA), 导流管, 流场结构, 回流区, 粒径分布

Abstract:

A computational fluid dynamics (CFD) approach was developed to simulate the EIGA (electrode induction melting gas atomization) with different protrusion lengths of delivery tube. The effect of the protrusion length of delivery tube on the flow field structure and powder particle size was analyzed. The results show that when the protrusion length is 0 mm, the maximum velocity in the recirculation zone is 335 m/s, and the expansion wave cluster at the gas outlet increased significantly, resulting in backflow phenomenon. With the increase of the protrusion length (1~4 mm), the length of the recirculation zone gradually increases, and the average particle size of the alloy powder prepared first decreases and then increases. The maximum suction pressure is achieved at 2 and 3 mm of protrusion length of delivery tube, which is beneficial to the secondary fragmentation of liquid droplets. When the protrusion length is 2 mm, the particle size distribution of the powders shows a normal distribution, and the median diameter (d50) of the powders is 84 μm, which is the most uniform particle size distribution and the narrowest particle size range.

Key words: electrode induction melting gas atomization (EIGA), delivery tube, flow field structure, recirculation zone, particle size distribution

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