Flow Simulation Of Centrifugal Pump By Using CFD And Performance Optimization

As a kind of general machinery, centrifugal pumps is widely applied in daily life and industrial production, which consumes more than 10% of the total generation every year. However, its efficiency is generally low and the energy saving potential is enormous.Taking the MJ125-100 pump as a research object, the internal flow field which is in the constant three-dimensional flow, has been simulated numerically with the multi-reference frame MRF model. The internal flow rate, pressure distribution and head which have been obtained, all accord with theoretical analysis and verify the correctness of the numerical simulation.Through the use of three kinds of k-εturbulence model, the internal flow field of different flows has been simulated and compared with the experimental data respectively. It comes to the conclusion that RNG k-s turbulence model is a suitable model. And the research indicates that the optimal impeller number is 6 and the cutting of non-working surface of impeller can increase the pump efficiency by comparing the parameters of flow field after cutting the non-working surface of impeller. All these investigations have important guiding significance for the design of centrifugal pump impeller, structural optimization and energy saving reconstruction.