Numerical simulation of solid-liquid two-phase flow in a centrifugal pump with different wear blades degree

Asian Working Group- IAHR's Symposium on Hydraulic Machinery and Systems

Lei, H.M.^1 ; Xiao, Y.X.^1 ; Chen, F.N.^1 ; Ahn, S.H.^1 ; Wang, Z.W.^1 ; Gui, Z.H.^2 ; Luo, Y.Y.^1 ; Zhao, X.R.^1

State Key Laboratory of Hydro Science and Engineering, Department of Thermal Engineering, Tsinghua University, Beijing

100084, China^1

Technology Canter State Grid Xinyuan Company LTD, Beijing

100161, China^2

关键词: Design flows;    Euler-Lagrange method;    Large flow rate;    Liquid turbulence;    Sand grains;    Small flow-rate;    Solid-liquid two phase flows;    Uniform distribution;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/163/1/012027/pdf
DOI  :  10.1088/1755-1315/163/1/012027

来源: IOP

【 摘 要 】

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.