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Effect of Blade Wrap Angle on Performance of a Single-Channel Pump

  • M. Tan
  • Y. Ji
  • H. Liu
  • X. Wu
  • Z. Zhu
Article

Abstract

To study the effect of blade wrap angle on energy performance and unsteady characteristics of the single-channel pump, a single-channel pump with specific speed of 140 was selected as experimental test model and three impeller models with blade wrap angle of 290°, 340° and 390° were respectively designed. The performance of different single-channel pumps with blade wrap angle of 290°, 340° and 390° respectively were tested. Based on the experimental study, the effect of blade wrap angle on the energy characteristics, head pulsation, pressure fluctuation and radial force of the single-channel pump was obtained and analyzed. The results show that with blade wrap angle increases from 290° to 390°, the maximum pump head and efficiency gradually increases and the maximum increase amplitude is 7.3% and 7.79% respectively. The minimum static pressure at impeller outlet under three schemes all occurs at 1.0Qd and bigger blade wrap angle can reduce the mixing loss at impeller outlet. With the increase of blade wrap angle, the head pulsation and pressure fluctuation all decrease gradually. The maximum eighth section under the small flow rate and under the big flow rate occurs at the volute second the section. A higher pressure fluctuation exists around volute tongue. The time-averaged radial force decreases as the blade wrap angle increases and its increase amplitude decreases as the flow rate increases. The research fruits can provide some reference and theoretical basis for the optimization of single-channel pumps.

Keywords

Blade wrap angle Single-channel pump Test Energy performance Unsteady characteristics 

Notes

Acknowledgments

The authors would like to acknowledge the financial support given by National Natural Science Foundation of China (No. 51579117, 51679110, 51509109), and the Foundation of Jiangsu Province (Grant No. BK20161350, BE2017356), A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

References

  1. 1.
    Hongxun C, Ma Z (2004) Internal Flow in Single Vane Pump[J]. Journal of Shanghai University (Natural Science) 10(4):371–375Google Scholar
  2. 2.
    Xuelian Z, Hongxun C (2006) Numerical Calculation of the Hydraulic Radial Force of Impeller within the Single Channel Pump[J]. Fluid. Machinery 34(1):23–26Google Scholar
  3. 3.
    Ji P, Qi YS, Jian Y (2013) Ping.Numerical analysis of periodic flow unsteadiness in a single-blade centrifugal pump[J]. SCIENCE CHINA: Technological. Sciences 56(1):212–221Google Scholar
  4. 4.
    Ji P, Yuan SQ, Yuan JP (2013) Numerical Investigation on Periodic Flow Unsteadiness in a Centrifugal Pump With Volute[C]// ASME 2013 Fluids Engineering Division Summer Meeting. V01BT10A003Google Scholar
  5. 5.
    Pei J, Yuan SQ, Yuan JP (2012) Numerical prediction of unsteady pressure field within the whole flow passage of a radial single-blade pump[J]. J Fluids Eng 134(10):101103CrossRefGoogle Scholar
  6. 6.
    Benra FK, Dohmen HJ, Sommer M (2005) Periodically Unsteady Flow in a Single-Blade Centrifugal Pump: Numerical and Experimental Results[C]//ASME 2005 Fluids Engineering Division Summer Meeting, Houston, 19–23Google Scholar
  7. 7.
    Benra FK, Dohmen HJ (2007) Numerical and experimental evaluation of the time-variant flow field in a single-blade centrifugal pump[C]. 5th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, South Africa, 1–4Google Scholar
  8. 8.
    Jin-Hyuk Kim, Bo-Min Cho, Young-Seok Choi, et al (2016) Optimized Reduction of Unsteady Radial Forces in a Singlechannel Pump for Wastewater Treatment[J]., 49:032008Google Scholar
  9. 9.
    Siekmann H, Stark M (1990) Analytical and experimental study of the hydrodynamic unbalance of single-vane impellers[C]//Third International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISRPMAC-3), Honolulu, HI, Paper No. D-28AGoogle Scholar
  10. 10.
    Stark M (1991) Design Criteria for Radial Wastewater Pumps Wheels with one blade and different energy flow [J]. Research in engineering 57(2):72–72Google Scholar
  11. 11.
    Ulbrich C (1997) Experimental investigation of the pump characteristics and velocity fields of a bucket centrifugal pump[D]. Dissertation TU, BerlinGoogle Scholar
  12. 12.
    Nishi Y, Fukutomi J, Fujiwara R (2012) Effect of blade outlet angle on radial thrust of single-blade centrifugal pump[J]. IOP Conf Series: Earth and Environmental Science 15(7):072039CrossRefGoogle Scholar
  13. 13.
    Nishi Y, Fukutomi J (2015) Component analysis of unsteady hydrodynamic force of closed-type centrifugal pump with single blades of different blade outlet angles[J]. International Journal of Rotating Machinery 2015(2):1–17Google Scholar
  14. 14.
    Aoki M (1984) Instantaneous interblade pressure distributions and fluctuating radial thrust in a single-blade centrifugal pump[J]. Bulletin of JSME 27(233):2413–2420CrossRefGoogle Scholar
  15. 15.
    Nishi Y, Fukutomi J, Fujiwara R (2011) Radial thrust of single-blade centrifugal pump [J]. International Journal of Fluid Machinery & Systems 4(4):387–395CrossRefGoogle Scholar
  16. 16.
    Sakai M, Nishi Y, Fukutomi J (2012) Study on unsteady hydrodynamic force of closed-type centrifugal pump with single-blade[J]. Transactions of the Japan Society of Mechanical Engineers Series B 78(788):837–849CrossRefGoogle Scholar
  17. 17.
    Nishi Y, Fukutomi J (2014) Effect of blade outlet angle on unsteady hydrodynamic force of closed-type centrifugal pump with single blade[J]. Int J Rotating Mach 2014(2):1–16Google Scholar
  18. 18.
    Xingfan G (2011) Modern pump theory and design [M]. China Aerospace Publishing House, BeijingGoogle Scholar
  19. 19.
    Stepanoff AJ (1950) Centrifugal and axial flow pumps[M]. Van Chong Book Company 15(11):678–683Google Scholar
  20. 20.
    Tan M, Rong D, Houlin L et al (2015) Analysis on pressure pulsation under different impeller diameters in double channel sewage pump[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE) 31(13):53–59 (in Chinese with English abstract)Google Scholar
  21. 21.
    Wu X, Jinsheng F, Houlin L et al (2017) Performance prediction of single-channel centrifugal pump with steady and unsteady calculation and working condition adaptability for turbulence model[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE) 33(Supp.1):85–91 (in Chinese with English abstract)Google Scholar
  22. 22.
    González J, Santolaria C, Parrondo JL, et al (2003) Unsteady radial forces on the impeller of a centrifugal pump with radial gap variation[C]//ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference, Honolulu, July 6–10, 1173–1181Google Scholar
  23. 23.
    González J, Parrondo JL, Santolaria C et al (2006) Steady and unsteady radial forces for a centrifugal pump with impeller to tongue gap variation[J]. J Fluids Eng 128(3):454–462CrossRefGoogle Scholar

Copyright information

© The Society for Experimental Mechanics, Inc 2018

Authors and Affiliations

  1. 1.Research Center of Fluid Machinery Engineering and TechnologyJiangsu UniversityZhenjiangChina
  2. 2.School of Energy & Power EngineeringJiangsu UniversityZhenjiangChina

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