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Study of a regenerative pump using numerical and experimental techniques

Quail, Francis and Scanlon, T.J. and Stickland, M.T. (2009) Study of a regenerative pump using numerical and experimental techniques. In: 8th European Turbomachinery Conference, 2009-03-23 - 2009-03-27.

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Regenerative pumps are the subject of increased interest in industry as these pumps are low cost, low specific speed, compact and able to deliver high heads with stable performance characteristics. The complex flow-field within the pump represents a considerable challenge to detailed mathematical modelling as there is significant flow separation in the impeller blading. This paper presents the use of a commercial CFD code to simulate the flow within the regenerative pump and compare the CFD results with new experimental data. The CFD results demonstrate that it is possible to represent the helical flowfield for the pump which has only been witnessed in experimental flow visualisation until now. The CFD performance results also demonstrate reasonable agreement with the experimental tests. The CFD models are currently being used to optimise key geometric features to increase pump efficiency.