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Leakage flow simulation in a specific pump model

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2014
auteur(s) Dupont Patrick; Bayeul-Laine Annie-Claude; Dazin Antoine; Bois Gérard; Roussette Olivier; Si Qiaorui
journal (abréviation) IOP Conference Series: Earth and Environmental Science (IOP Conference Series: Earth and Environmental Science)
volume (numéro) 22
  
pages 1 – 10
  Sous presse
résumé 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.
mots clés pump, numerical calculations,
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