Authors: Yi Li Zuchao Zhu Zhaohui He Weiqiang He
Publish Date: 2011/05/21
Volume: 20, Issue: 3, Pages: 283-
Abstract
Based on the solidliquid twophase mixture transportation test the renormalization group RNG ke turbulent model was utilized to simulate the solidliquid twophase turbulent flow in a centrifugal pump By comparing the simulated and experimental results inner flow features were revealed to improve the abrasion characteristic of the solidliquid twophase centrifugal pump The influence of the solid phase on centrifugal pump abrasive performance is small when the particle volume fraction is less than 25 The aggregation degree of the solid particles is enhanced as the particle diameter increases from 01 to 1 mm however the mixture density on the pressure side is reduced when the particle diameter increases to 1 mm for the impact of inertia The wear on the hub is most severe for the shear stress on this position it is also the largest The wear characteristic is affected greatly by the parameters of the solid phase The wear chracteristic can be optimized by decreasing the blade outlet angle In the modified design the blade angle is different whereas the other geometric dimensions remain the same The improved pump is simulated to contrast with the original pump The results show that the values of mixture density and shear stress both decrease The wear condition of the blade is improved to a certain extent
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