溢流口结构对水力旋流器性能影响的模拟分析

Simulation Analysis of Hydrocyclone with Different Vortex Finders

以工业用428 mm水力旋流器为研究对象,采用计算流体力学(CFD)技术对旋流器内流场和颗粒分级效率进行了数值模拟研究,对所建立的模型进行了验证,并在数值模拟的结果上分析了溢流口结构,包括溢流口直径、插入深度和溢流口的壁厚对水力旋流器性能的影响。重点考察了溢流口结构变化对旋流器内空气柱、压力降、分流比和分级效率的影响。模拟结果表明,溢流口结构变化对水力旋流器的性能会产生重大影响,计算所得最佳溢流口尺寸为:直径180 mm,插入深度168 mm,壁厚2 mm。

The computational fluid dynamic（CFD） technique was used to describe the flow fluid and the classification efficiency in the 428 mm industrial hydrocyclone. Through the model validation, the feasibility of the model was determined. And on the basis of the simulation method, effects of the vortex finder, including the vortex finder diameter, length and thickness, on the performance of the hydrocyclone were studied, focusing on the effect of air core, pressure drop, split ratio, and the classification efficiency. The results show that the different vortex finders have great effect on the performance of the hydrocyclone, especially the vortex finder diameter. The calculated optimal overflow size is, diameter of 180 mm, length of 168 mm, and thickness of 2 mm.