数值模拟在金属基废弃物复合材料工艺优化中的应用  

Application of Numerical Simulation to Process Optimization of Metal-Based Composites

作　　者：姚瑰妮 孙可伟[2] 张被刚[2] 张雷[2] 

机构地区：[1]云南大学化学科学与工程学院,云南昆明650051 [2]固体废弃物资源化国家工程中心,云南昆明650093

出　　处：《铸造》2010年第4期367-370,共4页Foundry

基　　金：国家自然科学基金资助项目(50774039)

摘　　要：针对搅拌工艺制备玻璃/铝基废弃物复合材料时,在不同的搅拌转速下使用计算流体力学(CFD)软件FLUENT对搅拌槽内两相流进行了CFD数值模拟。搅拌桨为三层。两相物系采用玻璃-铝体系,固体体积分数为15%。文中使用标准k-ε模型计算了固液两相的流场,考察了槽内流场的速度和压力分布规律,同时考察了不同转速下流场速度的分布。计算结果表明:流体在槽体内三个区域形成较大的循环流动,各个循环区域之间有一定的连接性。速度的最大值主要集中在桨叶外沿附近,有利于充分混合。转速越大,沿径向的速度变化幅度越大。从槽壁到轴心方向上的压力分布是不断减少的,越靠近搅拌轴,槽内的压力越低。Waste glass particles were successfully introduced into aluminum-based alloy （ZL105） melts as reinforcement to fabricate glass particle reinforced Al composites by stir. It was found that the choice of the stirred parameters influences the mechanical properties of the material directly. In this paper, the commercial software FLUENT was used with the standard k-ε turbulence model to simulate the flow field in stirred tank with multiple impellers. The result shows that there are bigger circular flows in three areas, and the circular areas join in each other. The biggest flow velocity concentrates on the outside of blade. The higher impeller rotating speed, the bigger velocity changing range along the radial direction. The distribution of pressure decreases continually from the wall of tank to axes.

关 键 词：复合材料 流场 多层桨 计算流体力学(CFD) 固-液搅拌槽 

分 类 号：TG24[金属学及工艺—铸造]