Calculation of the influence of solid-phase concentration on sewage pumps based on Mixture model | |
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( Volume 3 Issue 1,January 2017 ) OPEN ACCESS | |
Author(s): | |
LI Xin, ZHANG Yu-liang, YU Jian-ping, ZHOU Zhao-zhong | |
Abstract: | |
The steady flow of the internal flow field in a sewage pump was numerically simulated and analyzed as a solid–liquid two-phase flow was transported. The simulation and analysis were based on the mixture multiphase model, the RNG k–ε turbulence model, the frozen rotor method, and the SIMPLE algorithm. The impact of the solid–liquid two-phase flow on the hydraulic performance of the sewage pump and the attrition rate of the vane was emphatically analyzed under different solid-phase concentrations. Results show that, as the concentration of the transported solid phase increased, the pump lift and efficiency decreased monotonously. The shaft power also showed a tendency to monotonically increase. The solid-phase concentration on the pressure surface of the vane continuously increased as well. Under a high transportation concentration, the secondary part of the suction surface experienced the most severe wear. The equilibrium point of equal pressure continuously moved toward the leading edge of the vane. At the same time, the isoconcentration points of the pressure surface and suction surface moved toward the vane inlet. |
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