基于CFD的EIGA导流管伸出长度的优化研究  

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

作　　者：郭快快 李建中 刘常升 GUO Kuai-kuai;LI Jian-zhong;LIU Chang-sheng(School of Metallurgy,Northeastern University,Shenyang 110819,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Material Science&Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[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

出　　处：《东北大学学报（自然科学版）》2024年第9期1252-1257,共6页Journal of Northeastern University(Natural Science)

基　　金：常州市科技支撑计划(工业)(CE20220044).

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84μm,粒径分布最均匀,粒径范围最窄.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 84μm,which is the most uniform particle size distribution and the narrowest particle size range.

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 

分 类 号：TB126[理学—工程力学]