关键词: 计算流体力学, 离散相模型, 分离, 旋流器, 磨损

Abstract: Based on CFD method, the wall attrition of hydrocyclones for the separation of dispersed phase particles was simulated using the Reynolds stress model and discrete phase model in Fluent software. Results showed that the main attrition on the hydrocyclone wall was local attrition. In the annular region of the entrance, the main attrition was shock attrition. In the region of the cylinder and cone, the main attrition was grinding attrition. The most worn part was near the underflow port. The most worn part of the annular space of the entrance ranged from 100°to 110°in circumferential direction. The distribution of the attrition on the surface of the cylinder body wall was a downward spiral banding. The attrition was more serious on the cone wall to the end of the cone. And the peak attrition appeared at the underflow port. In the solid-liquid hydrocyclone, the attrition on the wall was more serious where the particle concentration was higher. The attrition rate increased with increasing feed velocity. The results can provide certain guidance to the design and application of hydrocyclone separator.

Key words: computational fluid dynamic, discrete phase model, separation, hydrocyclones, attrition