Journal of Hydrodynamics

, Volume 30, Issue 4, pp 672–681 | Cite as

The effects of the rotor-stator interaction on unsteady pressure pulsation and radial force in a centrifugal pump

  • Issa ChalghoumEmail author
  • Sami Elaoud
  • Hatem Kanfoudi
  • Mohsen Akrout


An unsteady numerical analysis has been conducted to study the strong interaction between impeller blade and volute tongue of a centrifugal pump. The 3-D-URANS equations were solved with the shear stress transport turbulence model for a wide range of flow rates. These unsteady interactions are mostly related to the unsteady radial force due to an imbalance in the pressure field at the impeller periphery. This force represents dynamic load that are one of the most important sources of vibration and hydraulic noise. Based on this phenomenon, this work analyzes and gives a more realistic prediction of the pressure fluctuation and the radial force during steady and unsteady calculation by considering the effect of the change in the pump operating point. Actually, the pressure fluctuations in the impeller and the volute were recorded by mounting nine monitoring points on the impeller and volute casing. The results of the existing analysis has proven that the pressure fluctuation is periodic due to the relative position of impeller blade to volute tongue. The characteristics of the time domain and frequency domain of the pressure pulsation were analyzed under different coupling conditions. Fast Fourier transform was performed to obtain the spectra of pressure pulsation. Besides, the steady and unsteady forces were calculated around the impeller periphery to fully characterize the pump behavior. The obtained pump performance curves were numerically compared with the experimental ones, and the outcome have shown an acceptable agreement between both curves.

Key words

Unsteady simulation blade-tongue interaction unsteady pressure distribution blade-passing frequency 


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  1. [1]
    Stepanoff A. J. Centrifugal and axial flow pumps [M]. New York, USA: John Wiley and Sons, 1996.Google Scholar
  2. [2]
    Neumann B. The interaction between geometry and performance of a centrifugal pump / B. Neumann [J]. Journal of Interlibrary Loan Document Delivery and Electronic Reserve, 1991, 18(2): 125–128.MathSciNetGoogle Scholar
  3. [3]
    Kaupert K. A., Staubli T. The unsteady pressure field in a high specific speed centrifugal pump impeller-Part I: Influence of the volute [J]. Journal of Fluids Engineering, 1999, 121(3): 621–626.CrossRefGoogle Scholar
  4. [4]
    Iversen H. W., Rolling R. E., Carlson J. J. Volute pressure distribution, radial force on the impeller and volute mixing losses of a radial flow centrifugal pump [J]. Journal of Engineering for Gas Turbines and Power, 1960, 82(2): 136–143.CrossRefGoogle Scholar
  5. [5]
    Adkins D. R., Brennen C. E. Analyses of hydrodynamic radial forces on centrifugal pump impellers [J]. Journal of Fluids Engineering, 1986, 110(1): 20–28.CrossRefGoogle Scholar
  6. [6]
    Hasegawa Y., Kikuyama K., Maeda T. et al. Unsteady pressure distributions and forces on the impeller blades of a centrifugal pump [C]. Proceedings of 15th IAHR Symposium, Belgrade, Yugoslavia, 1990.Google Scholar
  7. [7]
    Gopalakrishnan S. Pump research and development: past, present, and future-an American perspective [J]. Journal of Fluids Engineering, 1999, 121(2): 254–258.CrossRefGoogle Scholar
  8. [8]
    Hergt P. H. Pump research and development: past, present, and future [J]. Journal of Fluids Engineering, 1999, 121(2): 237–247.CrossRefGoogle Scholar
  9. [9]
    Brennen C. E. Hydrodynamics’ of pumps [M]. Oxford, UK: Oxford University Press and New York, USA: CETI Inc., 1994.Google Scholar
  10. [10]
    Chu S., Dong R., Katz J. Relationship between unsteady flow, pressure fluctuations, and noise in a centrifugal pump-part B: Effects of blade-tongue interactions [J]. Journal of Fluids Engineering, 1995, 117(1): 30–35.CrossRefGoogle Scholar
  11. [11]
    Yao Z., Wang F., Qu L. et al. Experimental investigation of time-frequency characteristics of pressure fluctuations in a double-suction centrifugal pump [J]. Journal of Fluids Engineering, 2011, 133(10): 101–303.CrossRefGoogle Scholar
  12. [12]
    Rodriguez C. G., Mateos-Prieto B., Egusquiza E. Monitoring of rotor-stator interaction in pump-turbine using vibrations measured with on-board sensors rotating with shaft [J]. Shock and Vibration, 2014, ID 276796.Google Scholar
  13. [13]
    Chalghoum I., Kanfoudi H., Elaoud S. et al. Numerical modeling of the flow inside a centrifugal pump: Influence of impeller-volute interaction on velocity and pressure fields [J]. Arabian Journal for Science and Engineering, 2016, 41(11): 4463–4476.MathSciNetCrossRefzbMATHGoogle Scholar
  14. [14]
    Smirnov P. E., Menter F. R. Sensitization of the SST turbulence model to rotation and curvature by applying the Spalart-Shur correction term [J]. Journal of Turbomachinery, 2009, 131(4): 041010.CrossRefGoogle Scholar
  15. [15]
    Pei J., Yuan S., Li X. J. et al. Numerical prediction of 3-D periodic flow unsteadiness in a centrifugal pump under part-load condition [J]. Journal of Hydrodynamics, 2014, 26(2): 257–263.CrossRefGoogle Scholar
  16. [16]
    Shojaeefard M. H., Tahani M., Ehghaghi M. B. et al, Numerical study of the effects of some geometric characteristics of a centrifugal pump impeller that pumps a viscous fluid [J]. Computers and Fluids, 2012, 60(4): 61–70.CrossRefGoogle Scholar
  17. [17]
    Khalifa A. E., Al-Qutub A. M., Ben-Mansour R. Study of pressure fluctuations and induced vibration at blade-passing frequencies of a double volute pump [J]. Arabian Journal for Science and Engineering, 2011, 36(7): 1333–1345.CrossRefGoogle Scholar
  18. [18]
    Pavesi G., Gavazzini G., Ardizzon G. Time-frequency characterization of rotating instabilities in a centrifugal pump with a vaned diffuser [J]. International Journal of Rotating Machinery, 2008, ID 202179.Google Scholar
  19. [19]
    Pavesi G., Gavazzini G., Ardizzon G. Time-frequency characterization of the unsteady phenomena in a centrifugal pump [J]. International Journal of Heat and Fluid Flow, 2008, 29(5): 1527–1540.CrossRefGoogle Scholar
  20. [20]
    Liu H., Wu X., Tan M. Numerical investigation of the inner flow in a centrifugal pump at the shut-off condition [J]. Journal of Theoretical and Applied Mechanics, 2013, 51(3): 649–660.Google Scholar
  21. [21]
    Zhang N., Yang M. G., Gao B. et al. Experimental investigation on unsteady pressure pulsation in a centrifugal pump with special slope volute [J]. Journal of Fluids Engineering, 2015, 137(6): 061103.CrossRefGoogle Scholar
  22. [22]
    GonzáLez J., Santolaria C. Unsteady flow structure and global variables in a centrifugal pump [J]. Journal of Fluids Engineering, 2006, 128(5): 937–946.CrossRefGoogle Scholar
  23. [23]
    Stel H., Amaral G. D. L., Negrao C. O. R. et al, Numerical analysis of the fluid flow in the first stage of a two-stage centrifugal pump with a vaned diffuser [J]. Journal of Fluids Engineering, 2013, 135(7): 071104.CrossRefGoogle Scholar
  24. [24]
    Versteeg H. K., Malalasekera W. Harlow, UK: Pearson Education Limited, 1996.Google Scholar

Copyright information

© China Ship Scientific Research Center 2018

Authors and Affiliations

  • Issa Chalghoum
    • 1
    Email author
  • Sami Elaoud
    • 1
  • Hatem Kanfoudi
    • 2
  • Mohsen Akrout
    • 1
  1. 1.Research Laboratory “Applied Fluid Mechanics, Process and Environment Engineering”National Engineering School of SfaxSfaxTunisia
  2. 2.Research Laboratory “Laboratory of Hydraulics and Environment Modeling”National Engineering School of Tunis, ENIT, Hydraulic EngineeringTunisTunisia

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