in the solid liquid two phase flow centrifugal pump

 

 

XIA Mi, LI Yi, LI Feng qin

 

(Key Laboratory of Fluid Transmission Technology of Zhejiang Province, 

Zhejiang Sci Tech University, Hangzhou 310018, China)

 

 

Abstract: Aiming at analyzing the problems of the influence of solid phase parameters on the motion of particles in the flow components, the particle trajectory, solid phase velocity distribution and the particle Reynolds number distribution of different flow components were investigated. The effect of the particle diameter and particle concentration on particle movement rule was summed up. The RNG k epsilon turbulence model and the discrete phase model were used to simulate the turbulent flow field in a solid liquid two phase centrifugal pump. The results indicate that the number of particles collide with the volute is reduced with the increasing of diameter and particle concentration. In the impeller flow passage, particles collide with blade on the working face. The solid phase velocity in the whole flow passage has a tendency to decrease with the diameter increases. The liquid phase and solid phase are separated seriously in the volute and impeller flow passage so the two phase slip velocity is the larger there.

 

Key words: discrete phase model; solid liquid two phase flow; motion law; numerical simulation