双层桨搅拌浸出槽固液两相流场的数值仿真  

Numerical Simulation for Solid–Liquid Two-Phase Flow in Stirred Leaching Tank of Double Blade

作　　者：吴宗武[1] 孔建益[1] 侯宇[1] 王兴东[1] 

机构地区：[1]武汉科技大学机械自动化学院,湖北武汉430081

出　　处：《计算机仿真》2014年第9期247-251,共5页Computer Simulation

基　　金：国家十二五科技支撑计划项目(2011BAB05B02)

摘　　要：在石煤提钒搅拌浸出槽的研究中,针对双层桨搅拌浸出槽固液悬浮特性以及混合浸出效果进行了研究。由于实验成本大、操作困难,提出了数值仿真的方法。运用计算流体力学(CFD)软件FLUENT对石煤提钒搅拌浸出槽进行流场仿真,用GAMBIT建立流场实体模型,采用k-ε湍流模型以及多重参考系法(MRF)处理搅拌桨区。探讨了双层桨同向旋转和双层桨异向旋转两种情况下的搅拌效果,结果表明在相同的情况下,双层桨异向旋转时湍动能分布更为合理,并且能够缓解底部沉积,搅拌混合效果更好。仿真结果对于研究搅拌反应容器内部流场规律,进而对搅拌反应容器的结构优化和浸出率的提高具有一定参考价值。The study was focused on the solid-liquid suspension characteristics and mixing and leaching effect of the stirred leaching tank in the research of the stone coal vanadium leaching tank of double blade. Because the leaching experiment operation is difficult and the cost is high, the Numerical Simulation was put forward. GAMBIT was used to establish flow field physical model, the k-e turbulence model and multiple reference frame method to process the agitating area and simulate the flow field in the leaching tank for the stone coal V extraction in the Computational Fluid Dynamics （CFD） Software-Fluent. We also discussed the mixing effect under the two conditions, double im- peller rotate in the same direction and in different directions. The result shows that the mixing effect of the double blade rotate in different directions is better under the same condition, the distribution of the turbulent kinetic energy under the double blade rotate in different directions is more uniform and reasonable, and can ease the sediment at the bottom. The simulation results have certain reference value for the research on the law of the internal flow field so as to optimize its structure in the stirred reaction vessel.

关 键 词：浸出槽 固液两相流 湍流 湍动能 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]