International Journal of Fluid Machinery and Systems

Korean Society for Fluid machinery (한국유체기계학회)
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Leakage Flow Influence on SHF pump model performances

  • Received : 2015.01.15
  • Accepted : 2015.09.02
  • Published : 2015.09.30
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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+ 9.06 code (RANS frozen and unsteady calculations). Some results were already presented at the XXth IAHR Symposium for three flowrates for RANS frozen and URANS calculations. In the present paper, comparisons between URANS calculations with and without leakages and experimental results are presented and discussed for these flow rates. The performances of the diffuser obtained by numerical calculations are compared to those obtained by the three-holes probe measurements. The comparisons show the influence of fluid leakages on global performances and a real improvement concerning the efficiency of the diffuser, 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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References

  1. Wuibaut G., Dupont P., Caignaert G., Stanislas M., 2000, "Experimental analysis of velocities in the outlet part of a radial flow pump impeller and the vanelessdiffuser using particle image velocimetry", Proceedings of the XX IAHR Symposium(Charlotte USA) 6-9 august, paper GU-03.
  2. Wuibaut G., 2001, "Etude par velocimetrie par images de particules des interactions roue-diffuseur dans une pompe centrifuge", PhD thesis, These de Doctorat Ensam
  3. Cavazzini G., 2006, "Experimental and numerical investigation of the rotor-stator interaction in radial turbomachines", Ph.D. thesis, University of Padova, (Padova, Italy)
  4. Cavazzini G., Pavesi G., Ardizzon G., Dupont P., Coudert S., Caignaert G., Bois G., 2009, "Analysis of the rotor-stator interaction in a radial flow pump", Houille blanche -Revue internationale de l'eau ,pp. 141-151
  5. Cavazzini G., Dupont P., Pavesi G., Dazin A., G.Bois, Atif A., Cherdieu P., 2011, "Analysis of unsteady flow velocity fields inside the impeller of a radial flow pump : PIV measurements and numerical calculation comparisons", Proc. of ASME-JSMEHSME Joint fluids engineering conferenceJuly 24-29,(Hamamatsu, Japan)
  6. Cherdieu P., Dupont P., Bayeul-laine A.C., Dazin A., Bois G., 2013, "Data reduction problems using a 3 - hole directional pressure probe to investigate mean flow characteristics in the vaneless gap between impeller and diffuser radial pump", IOP Conference Series Earth and Environmental Science 09/2013; 52(topic 2).
  7. Bayeul-Laine A.C., Dupont P., Cavazzini G., Cherdieu P., Dazin A., Bois G., Roussette O., 2013,
  8. Bayeul-Laine A.C., Dupont P. , Miccoli L., Cavazzini G., Dazin A., Pavesi G., Bois G., 2014, "Fluid leakage effect on analysis of a vaneddiffuser of SHF pump", 15th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-15, (Honolulu, Hawai, USA); 02/2014
  9. Adamczyk J. J., Celestina M. L., Chen J. P. 1994 Wake induced unsteady flows :their impact on rotor performance and wake rectification ASME International Gas Turbine and Aeroengine Congress and Exposition(The Hague, Netherlands), June 13-16, paper 94GT219.
  10. Arndt N., Acosta A.J., Brennen C.E., Caughey T.K 1990 - Experimental Investigation of Rotor - Stator Interaction in a Centrifugal Pump With Several Vaned Diffusers ASME Journal of TurbomachineryVol. 112 p. 98-108. https://doi.org/10.1115/1.2927428
  11. Eisele K., Zhang Z., Casey M. V., Gulich J., Schachenmann A. 1997 Flow analysis in a Pump Diffuser Part 1 : LDA and PTV Measurements of the Unsteady Flow Transactions of ASME, Journal of Fluids Engineering Vol. 119, pp. 968-977 https://doi.org/10.1115/1.2819525
  12. Culver R., Liu F., 2009, "Plane Method for Flutter Computation in Multi-stage Turbomachines", 47th AIAA Aerospace Sciences Meeting Including The New Horizons Forum and Aerospace Exposition January5-8, (Orlando, Florida)
  13. Petit O., Nilsson H., 2013, "Numerical Investigations of Unsteady Flow in a Centrifugal Pump with a vaned Diffuser", International Journal of Rotating Machinery, Vol. 2013, Article ID 961580, 14 pages
  14. Tamm A., Gugau M., Stoffel B,.2002, "Experimental and 3-D Numerical Analysis of the Flow Field in Turbomachines- Part I", International Congress on Quality Assesment of Numerical Simulations in Engineering (Conception -Chile)
  15. Dazin A., CoutierDelgosha O., Dupont P., Coudert S., Caignaert G., Bois G., 2008, "Rotating Instability in the VanelessDiffuser of a Radial Flow Pump", Journal of Thermal Science 17, (4), pp. 368-374 https://doi.org/10.1007/s11630-008-0368-3
  16. Dazin A., Cavazzini G., Pavesi G., Dupont P., Coudert S., Ardizzon G., Caignaert G., Bois G., 2011, "High-speed stereoscopic PIV study of rotating instabilities in a radial vanelessdiffuser", Exp Fluids, 51(1), pp. 83-93 https://doi.org/10.1007/s00348-010-1030-x
  17. Cherdieu P., 2014, "Controle du decollement dans un diffuseur aube de turbomachine centrifuge" PhD thesis,
  18. Menter, F. R. and Kuntz, M., 2002, Adaptation of Eddy Viscosity Turbulence Models to Unsteady Separated Flows Behind Vehicles in The Aerodynamics of Heavy Vehicles: Trucks, Buses and Trains Springer Asilomar CA.
  19. Khelladi S., Sarraf C, Bakir F., Rey R., 2010, "Study of a high rotational speed shrouded centrifugal, fan: aerodynamics and effects of a shroud-associated"; Proceedings of the Institution of Mechanical Engineers Part A Journal of Power and Energy, 01/2010; 224(5):691-700. DOI:10.1243/09576509JPE899 201