某型真空出铝抬包引射器的流场模拟及优化

Flow Field Simulation and Structure Optimization of Ejector in a Vacuum Ladle

为了了解某型号真空吸铝抬包的引射器中流体流动情况,使用Fluent软件对其进行了数值模拟,分析了其压力及流速分布情况。在此基础上,分析了该型号引射器为单吸入口的不足之处。通过优化结构,将其修改为对称双入口结构的引射器,并再次模拟计算了抬包吸入口的负压值,获得了吸铝所需较科学的最低引射气流压力值。并进一步运用VOF两相流模型模拟了真空抬包的瞬态吸铝过程,获得了不同时刻铝水在抬包中的流动及体积分数分布情况,为设备的升级改造的提供了理论依据。

In order to understand the fluid flow in the ejector of a certain type of vacuum ladle for pumping aluminum liquid,Fluent software is used for numerical simulation,and the distribution of pressure and velocity are analyzed.On this basis,the shortcomings of the ejector with a single suction inlet are analyzed.We then optimize the structure of the ejector and modify it as a double inlet ejector.We simulate and calculate the negative pressure of suction inlet in vacuum ladle,and obtain the lowest injection pressure value required for pumping aluminum liquid.We further use the VOF two-phase flow model to simulate the process of pumping aluminum liquid in the vacuum ladle.The flow and volume fraction of aluminum liquid at different times are obtained.The study provides some theoretical basis for the upgrading of the equipment.