基于Fluent的锥形底泥浆储罐内腔流场数值模拟  

Fluent-based Numerical Simulation of Cavity Flow Field in Slurry Tank With Cone Bottom

作　　者：石亚超[1] 高健[1] 王鲁斐[1] 焦静[1] 

机构地区：[1]江苏省安全生产科学研究院

出　　处：《化工机械》2013年第5期634-638,共5页Chemical Engineering & Machinery

摘　　要：运用计算流体力学(CFD)软件Fluent,采用多重参考系法(MRF),对某锥形底泥浆储罐的内腔流场进行了三维数值模拟,分析了在正常工况下的搅拌功率、速度场和浓度场的分布情况。结果表明,介质为高粘度非牛顿固液两相流时,现有罐底搅拌桨桨端附近区域有一定径向流,罐内无明显轴向流动,混合效果不好。较低的搅拌转速,使得固相介质迅速沉降,易造成出口堵塞。越接近罐底,物料颗粒间的剪切应力越大,使搅拌过程更加困难。数值模拟可以详细的描述流场分布情况,并为泥浆储罐的进一步改造提供参考。Making use of the Fluent and the multi-reference frame （MRF） , the 3D simulation of the cavity flow field of a slurry tank with cone bottom was implemented, including analysis of the mixing power, velocity field and the concentration field distribution in normal operating condition. The results indicate that as for non- Newtonian liquid-solid flow with high viscosity, the radial flow exists in the agitator＇ s end zone but no obvious axis flow can be found in the tank along with a poor mixing effect. The low agitation speed which makes solid media sediment rapidly can cause outlet blocking. When it closes to the tank bottom, the shear stress between material granules becomes bigger and this makes agitation process more difficult. The numerical simulation can describe the flow field distribution in detail and meanwhile provides the reference for the reconstruction of the slurry tank.

关 键 词：泥浆储罐 搅拌 数值模拟 流场分析 

分 类 号：TQ027.2[化学工程]