Abstract: The 3-D turbulent flow in the impeller with splitting vanes of centrifugal pumps is simulated. The time- averaged N-S equations and the k-e turbulent model is modified. By applying SIMPLE-C algorithm to make pressure-velocity correction equation, the calculation is carried out in body-fitted coordinated grid. The calculated velocity, pressure distributions of the turbulent flow in the impeller with splitting vanes of centrifugal pump are obtained, which will be helpful for the optimal design and performance prediction of centrifugal pumps with splitting vanes on the basis of flow field simulation.

Key words: Centrifugal pump, Numerical simulation, Splitting vanes, Turbulent flow, multi-objective optimization, nonlinear regression fitting, CNC Milling, cutting parameters, energy efficiency