Author(s): H M Lei; Y X Xiao; F N Chen; S H Ahn; Z W Wang; Z H Gui; Y Y Luo; X R Zhao

Linked Author(s):

Keywords: Centrifugal pump; Solid-liquid two-phase flow; Blade wear; Euler-Lagrange method

Abstract: Based on the SST liquid turbulence model, using the Euler-Lagrange method to simulate solid-liquid two-phase flow in the centrifugal pump with different degree of wear blades. When the pump was transporting silt-laden flow, numerical simulations with the Euler-Lagrange method to analyse the trajectory of the sands and the mechanism of wear. According to the simulation results, when the flow rate is less than the design flow, the efficiency decreases gradually with the increase of the wear of the runner blade. When the flow rate is larger than the designed flow rate, the efficiency will decrease first and then increase. As the degree of wear increases, the head and power are increasing. With the increase of flow rate, the volume fraction of sand grains distributed in the pressure face of the blades increases, and the distribution of sand grains in the volute outlet change from the uniform distribution of small flow rates to the concentrated distribution of the volcanic surface at large flow rates.

DOI: https://doi.org/10.1088/1755-1315/163/1/012027

Year: 2017