In this paper, investigation of turbulence modeling for a centrifugal pump is presented in the form of characteristic curves. A commercial CFD code was used to solve the governing equations of the flow field. Turbulent flow is simulated by employing standard k-ε, RNG and RSM models. Existence of an inducer in the flow direction to prevent cavitation makes two-dimensional simulations of the present configuration impossible. Three-dimensional simulations were therefore performed to predict velocity and pressure fields at different flow rates. Considering the only one available experimental data, the optimum turbulence model for the problem was found. Additionally, effect of number of blades on the efficiency of pump was studied. The number of blades was changed from 6 to 5 and 7, then all calculations were performed afresh. Investigations of this kind may help reduce the required experimental work for the development and design of such devices.

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