MEMO No CFD/MECHA-7-2011
DATE: January 21, 2011Abstract: A single-blade sewage pump is simulated numerically using a FINFLO flowsolver. Low-Reynolds number approach is utilized with a k − ǫ turbulence closure. Influence of an internal timestep on a convergence of a time-accurate simulation is studied. The effect of the boundary conditions on a performance prediction, mass balance fluctuation and velocity distributions is studied by using also flow controlled boundary conditions.
Main result: Pump head, efficiency and torque are obtained from the simulated flowfield and compared to measured data. The velocity distributions are also compared to the measurements available. The convergence of the pressure is poor witch affects significantly pump performance prediction. In spite of that, prediction of velocity distributions is quite good
