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Leakage flow simulation in a specific pump model

Article dans une revue avec comité de lecture
Author
DUPONT, Patrick
120930 Centrale Lille
BOIS, Gérard
ROUSSETTE, Olivier
SI, Qiaorui
ccDAZIN, Antoine
1252 Laboratoire de Mécanique de Lille - FRE 3723 [LML]
175453 Arts et Métiers ParisTech
85618 ENSAM
ccBAYEUL-LAINÉ, Annie-Claude

URI
http://hdl.handle.net/10985/9262
DOI
10.1088/1755-1315/22/1/012012
Date
2014
Journal
IOP Conf. Series: Earth and Environmental Science

Abstract

This paper deals with the influence of leakage flow existing in SHF pump model on the analysis of internal flow behaviour inside the vane diffuser of the pump model performance using both experiments and calculations. PIV measurements have been performed at different hub to shroud planes inside one diffuser channel passage for a given speed of rotation and various flow rates. For each operating condition, the PIV measurements have been trigged with different angular impeller positions. The performances and the static pressure rise of the diffuser were also measured using a three-hole probe. The numerical simulations were carried out with Star CCM+ 8.06 code (RANS frozen and unsteady calculations). Comparisons between numerical and experimental results are presented and discussed for three flow rates. The performances of the diffuser obtained by numerical simulation results are compared to the performances obtained by three-hole probe indications. The comparisons show few influence of fluid leakage on global performances but a real improvement concerning the efficiency of the impeller, the pump and the velocity distributions. These results show that leakage is an important parameter that has to be taken into account in order to make improved comparisons between numerical approaches and experiments in such a specific model set up.

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