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Experimental Determination of Cavitation Characteristics of Low Specific Speed Pump using Noise and Vibration

  • Christopher Stephen
  • S. KumaraswamyEmail author
Original Contribution
  • 92 Downloads

Abstract

An experimental investigation of the cavitation behaviour of a radial flow pump of metric specific speed 23.62 rpm having different leading edge profiles of the vane is presented. The pump was operated for flow rates from 80 to 120% of the best efficiency point. The measurement included noise and vibration signals apart from the hydraulic parameters. The results exhibited the trends of noise and vibration with respect to percentage of head drops for all operating conditions. It was concluded that the trends were totally different for various flow rates. Hence it is suggested that the criteria to be used for detecting the early cavitation in pump based on noise and vibration signals should be a function of the flow rate. Further, it was found that the range of frequency band for noise and vibration was within 5 kHz with reference to the magnitude of fluctuation. The repeatable predominant frequency of vibration for prediction of cavitation behaviour of this particular pump was established as 0.992 kHz.

Keywords

Cavitation Noise Vibration NPSH Vane leading edge Low specific speed 

Notes

Acknowledgement

The authors are thankful to the Hydroturbo Machines Lab, Department of Mechanical Engineering, Indian Institute of Technology, Madras, Chennai.

References

  1. 1.
  2. 2.
    A.J. Stepanoff, Centrifugal and Axial Flow Pumps, 2nd edn. (Wiley, New York, 1957)Google Scholar
  3. 3.
    S. Minami, K. Kawaguchi, T. Homma, Experimental study on cavitation in centrifugal pump impellers. Bull. JSME 3(9), 19–29 (1960)CrossRefGoogle Scholar
  4. 4.
    S.C. Li, Cavitation of Hydraulic Machinery (Imperial College Press, London, 2000)CrossRefGoogle Scholar
  5. 5.
    R.T. Knapp, J.W. Daily, F.G. Hammitt, Cavitation (McGraw-Hill, New York, 1970)Google Scholar
  6. 6.
    J.J. Varga, G. Sebestyen, Experimental investigation of cavitation noise. La Houille Blanche 8, 905–909 (1966)CrossRefGoogle Scholar
  7. 7.
    S. Gopalakrishnan, Modern cavitation criteria for centrifugal pumps, in Proceedings of the 2nd International Pump Symposium, Turbomachinery Lab, Texas A&M University (1983), p. 3–9Google Scholar
  8. 8.
    S. Kumaraswamy, Cavitation studies of centrifugal pumps. PhD Thesis, Indian Institute of Technology Madras, India (1986)Google Scholar
  9. 9.
    J. Friedrich, Diagnosis of cavitation in centrifugal pumps. Sulzer Tech. Rev. 1, 30–35 (1992)Google Scholar
  10. 10.
    M. Chudina, Detection of cavitation phenomenon in a centrifugal pump using audible sound. Mech. Syst. Signal Process. 17(6), 1335–1347 (2003)CrossRefGoogle Scholar
  11. 11.
    L. Alfayez, D. Mba, Detection of incipient cavitation and determination of the best efficiency point for centrifugal pumps using acoustic emission. J. Process Mech. Eng. 219(4), 327–344 (2005)CrossRefGoogle Scholar
  12. 12.
    M. Čudina, J. Prezelj, Use of audible sound for safe operation of kinetic pumps. Int. J. Mech. Sci. 50(9), 1335–1343 (2008)CrossRefGoogle Scholar
  13. 13.
    S. Christopher, S. Kumaraswamy, Identification of critical NPSH from noise and vibration in a radial flow pump for different leading edge profiles of the vane. J. Fluids Eng. 135(12), 121301-1–121301-15 (2013)CrossRefGoogle Scholar
  14. 14.
    L. Jiaxing, Y. Shouqi, L. Yin et al., Numerical and experimental investigation on the development of cavitation in a centrifugal pump. J. Process Mech. Eng. 230(3), 1989–1996 (2014)Google Scholar
  15. 15.
    Y. Luo, X. Zhixiang, H. Sun et al., Research on the induction motor current signature for centrifugal pump at cavitation condition. Adv. Mech. Eng. 7(11), 1–13 (2015)CrossRefGoogle Scholar
  16. 16.
    T. Kasai, Y. Takamatu, Flow in a radial impeller with cavitation. Bull. JSME 7(27), 543–552 (1964)CrossRefGoogle Scholar
  17. 17.
    A. Kovats, Design and Performance of Centrifugal and Axial Flow Pumps and Compressors (Pergamon Press, New York, 1964)Google Scholar
  18. 18.
    S. Lazarkiewicz, A.T. Troskolanski, Impeller Pumps (Pergamon Press, Oxford, 1965)Google Scholar
  19. 19.
    B. Neumann, The Interaction Between Geometry and Performance of a Centrifugal Pump (MEP, London, 1991)Google Scholar
  20. 20.
    R. Balasubramanian, S. Bradshaw, E. Sabini, Influence of impeller leading edge profiles on cavitation and suction performance, in Proceedings of the 27th International Pump Users Symposium, Houston, Texas, September 12–15 (2011), p. 1–11Google Scholar
  21. 21.
    IS 14615 (Part 1):1999/ISO 5167-1:1991. Measurement of fluid flow by means of pressure differential devices Google Scholar
  22. 22.
    R. Barri, J. Parrondo, E. Blanco, Numerical analysis of the unsteady flow in the near-tongue region in a volute-type centrifugal pump for different operating points. Comput. Fluids 39(5), 859–870 (2010)CrossRefzbMATHGoogle Scholar
  23. 23.
    P. Ligneul, C. Crance, A. Bovis, Tip vortex cavitation noise of a screw propeller theory and experiments, in Proceedings of the 2nd International Conference on Cavitation, I. Mechanical Engineering, September (1983), p. 289–297Google Scholar
  24. 24.
    S. Christopher, S. Kumaraswamy, Experimental study of cavitation hysteresis on radial flow pump. Mech. Eng. Div. Inst. Eng. J. 92, 34–39 (2011)Google Scholar
  25. 25.
    J.F. Guelich, Centrifugal Pumps, 3rd edn. (Springer, New York, 2014)Google Scholar
  26. 26.
    T. Okamura, H. Miyashiro, Cavitation in centrifugal pumps operating at low capacities. Polyphase Flow in Turbomachinery, Winter Annual Meeting of the ASME, California, December (1978), p. 243–251Google Scholar
  27. 27.
    P.J. McNulty, I.S. Pearsall, Cavitation inception in pumps. J. Fluids Eng. 104(1), 99–104 (1982)CrossRefGoogle Scholar
  28. 28.
    C.T. Tan, S. Leong, An experimental study of cavitation detection in a centrifugal pump using envelope analysis. J. Syst. Des. Dyn. 2(1), 274–285 (2008)MathSciNetGoogle Scholar
  29. 29.
    S. Gupta, V.K. Chouksey, M. Srivastava, Online detection of cavitation phenomenon in a centrifugal pump using audible sound. ITSI Trans. Electr. Electron. Eng. 1, 103–107 (2013)Google Scholar
  30. 30.
    A. Kotb, A.M. Abdulaziz, Cavitation detection in variable speed pump by analyzing the acoustic and vibration spectrums. Engineering 7, 706–716 (2015)CrossRefGoogle Scholar

Copyright information

© The Institution of Engineers (India) 2018

Authors and Affiliations

  1. 1.National Research Center of Pumps, Jiangsu UniversityZhenjiangChina
  2. 2.Hydroturbomachines Lab, Department of Mechanical EngineeringIndian Institute of Technology MadrasChennaiIndia

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