新型α旋流器流场模拟与实验研究

Simulation and Experiment Study on the Flow Field of New Type α Hydrocyclone

根据集成膜法海水软化技术对海水超滤前分离粒度及效率的要求,开发出了内置导流板和曲线长锥体的新型α旋流器,并对其流场特性进行了数值模拟和实验研究。以CFD模拟软件Fluent6.2提供的雷诺应力模型(RSM)为基础,分析了速度矢量、切向速度、轴向速度等参数的分布规律,研究了内部导流板和曲线长锥体结构对其分离性能的影响。按照模拟优化结果,加工了相同的尺寸常规旋流器和新型α旋流器,以水-细砂为实验物系对两旋流器的分离性能做了对比实验。模拟和实验结果表明:与常规旋流器相比,新型α旋流器以内构件对流体进行导流和整流后,不仅流场稳定,而且能耗小、压降低。在相同操作条件下,对于小粒径颗粒的分级效率新型α旋流器优于常规旋流器,对于5μm粒径的颗粒其分离效率达到90%;当分流比为0.87时,其分割粒径d50为1.3μm。

A new type α hydrocyclone with long curve cone and fluid guide board was designed in order to be used to obtain eligible water before the disposal of seawater by membrane device. The Reynolds stress model (RSM) with CFD simulation software Fluent 6.2 was used to analyze the distribution rule of velocity vector, tangential velocity, axial velocity and other parameters. The influences of long curve cone and fluid guide board on the separation efficiency were studied. According to the simulation results, a gen...