阀体孔板
喷嘴
堵塞
材料科学
联轴节(管道)
流体体积法
体积热力学
粒子(生态学)
机械
喷嘴
流量(数学)
冶金
机械工程
热力学
物理
工程类
海洋学
考古
历史
地质学
作者
Junfeng Wang,Min Xia,Jialun Wu,Changchun Ge
标识
DOI:10.1080/00325899.2023.2189083
摘要
The clogging problem of close-coupled nozzles in the vacuum induction melting gas atomisation (VIGA) process is studied by numerical simulation and industrial experiments. To understand the factors affecting lick back on the nozzle, volume of fluid (VOF) multiphase flow model simulation was adopted to visualise the motion of alloy melt around the outer wall of the delivery tube in the primary atomisation process. When the melt orifice diameter is 4 mm and the atomisation pressure is close to 3.5 MPa, the atomisation process is continuous, the powder particle size is fine, and the atomiser can be reused. When the orifice diameter is 5 mm, and the atomisation pressure is greater than 2.5 MPa, the risk of nozzle clogging is avoided, the powder size is relatively coarse. In the case of using the same atomiser structure, this study explains the mechanism of lick-back and the resulting nozzle damage in VIGA units.
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