圆盘浇铸机动态浇铸过程数值模拟

摘要

基于圆盘浇铸过程浇铸工具(中间包和浇铸包)的最优定量浇铸曲线的获取是决定浇铸质量的关键,而定量浇铸现场环境十分恶劣,无法通过现场反复实验来获得浇铸工具的最优定量浇铸曲线,应用Fluent软件对圆盘浇铸机的动态浇铸过程进行数值模拟,建立定量浇铸过程的数值仿真模型,编制UDF(用户自定义函数)设置浇铸工具的运动曲线,应用动网格模拟浇铸工具的刚体运动过程,并对浇铸过程进行气-液两相速度场计算.研究结果表明:数值仿真模型准确可靠;所获取的圆盘浇铸过程最优定量浇铸曲线直观地反映了中间包和浇铸包内铜液的速度场、气-液两相变化和浇铸工具刚体的运动,从而可对工业现场浇铸工具最优定量浇铸曲线的设置以及参数的优化提供参考.%Considering the fact that it is essential to obtain the most available casting motion curve of casting tools for casting, but it is difficult to verify the optimal casting motion curve by repeating field experiments because of the harsh industrial environments, CFD (computational fluid dynamics) software, i.e. Fluent, was used for three-dimension numerical simulation of the casting tools quantitative casting process to obtain numerical model which simulated the dynamic casting process. UDF (user-defined-function) was programed to set the motion curve for the casting tools, and dynamic mesh was used to simulate the casting tools dynamic casting process and Fluent software was used to study the gas-liquid two-phase flow of the casting tools. The results show that numerical simulation model is basically reliable, which can be used to obtain the best working curve of casting tools and to intuitively represent the distributions of the flow field in casting tools, and the change of gas-liquid two phase as well as the movement of casting tools can be investigated. Therefore, the technical guidance can be provided for the operation of setting casting motion curve and the parameter optimization.