International Journal of Fluid Machinery and Systems

Korean Society for Fluid machinery (한국유체기계학회)
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Numerical studies on cavitation behavior in impeller of centrifugal pump with different blade profiles

  • Song, Pengfei (Mechanical and Transportation Engineering, China University of Petroleum) ;
  • Zhang, Yongxue (Mechanical and Transportation Engineering, China University of Petroleum) ;
  • Xu, Cong (Mechanical and Transportation Engineering, China University of Petroleum) ;
  • Zhou, Xin (Mechanical and Transportation Engineering, China University of Petroleum) ;
  • Zhang, Jinya (Mechanical and Transportation Engineering, China University of Petroleum)
  • Received : 2015.04.27
  • Accepted : 2015.06.08
  • Published : 2015.06.30
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Abstract

To investigate the influence of blade profiles on cavitation behavior in impeller of centrifugal pump, a centrifugal pump with five different blade profiles impellers are studied numerically. The impellers with five different blade profiles (single arc, double arcs, triple arcs, logarithmic spiral and linear-variable angle spiral) were designed by the in-house hydraulic design code using geometric parameters of IS 150-125-125 centrifugal pump. The experiments of the centrifugal pump have been conducted to verify numerical simulation model. The numerical results show that the blade profile lines has a weak effect on cavitation inception near blade inlet edge position, however it has the key effect on the development of sheet cavitation in impeller, and also influences the distribution of sheet cavitation in impeller channels. A slight changing of blade setting angle will induce significant difference of cavitation in impeller. The sharp changing of impeller blade setting angle causes obvious cavitation region separation near the impeller inlet close to blade suction surface and much more flow loss. The centrifugal pump with blade profile of setting angle gently changing (logarithmic spiral) has the super cavitation performance, which means smaller critical cavitation number and lower vapor cavity volume fraction at the same conditions.

Keywords

References

  1. Herbich J B. Modifications in Design Improve Dredge Pump Efficiency[R]. LEHIGH UNIV BETHLEHEM PA FRITZ ENGINEERING LAB, 1962.
  2. Cooper P, Sloteman D P. Impeller for centrifugal pumps: U.S. Patent 5,192,193[P]. 1993-3-9.
  3. Hackworth M, Eslinger D, Harrell N R. Impeller for centrifugal pump: U.S. Patent 7,549,837[P]. 2009-6-23.
  4. Franc, Jean-Pierre, and Jean-Marie Michel, eds. Fundamentals of cavitation. Vol. 76. Springer, 2006.202-204.
  5. Katz J. Cavitation phenomena within regions of flow separation[J]. Journal of Fluid Mechanics, 1984, 140(4): 397-436. https://doi.org/10.1017/S0022112084000665
  6. Franc J P, Michel J M. Attached cavitation and the boundary layer: experimental investigation and numerical treatment[J]. Journal of Fluid Mechanics, 1985, 154: 63-90. https://doi.org/10.1017/S0022112085001422
  7. Sears W R. Potential flow around a rotating cylindrical blade[J]. Journal of the Aeronautical Sciences (Institute of the Aeronautical Sciences), 2012, 17(3).
  8. Fogarty L E. Potential flow around a rotating, advancing cylindrical blade[J]. Journal of the Aeronautical Sciences (Institute of the Aeronautical Sciences), 2012, 17(9).
  9. Dumitrescu H, Cardos V. Analysis of leading-edge separation bubbles on rotating blades[J]. Journal of Aircraft, 2010, 47(5): 1815-1819. https://doi.org/10.2514/1.C000274
  10. Trigg M A, Tubby G R, Sheard A G. Automatic genetic optimization approach two-dimensional blade profile design for steam turbines[J]. Journal of turbomachinery, 1999, 121(1): 11-17. https://doi.org/10.1115/1.2841220
  11. Xu Y. The theory study of circular blade profile line[J]. Fluid Machinery, 1990, 08: 007.
  12. Xu Y. The drawing method of cylindrical blade with variable angle spiral[J]. Fluid Machinery, 1989, 7: 006.
  13. Jing Y. Design of Cylindrical Blade with Involute Contour[J]. Transactions of the Chinese Society of Agricultural Machinery, 2003, 34(5): 80-81.
  14. Coutier-Delgosha O, Hofmann M, Stoffel B, et al. Experimental and numerical studies in a centrifugal pump with twodimensional curved blades in cavitating condition[J]. Journal of Fluids Engineering, 2003, 125(6): 970-978. https://doi.org/10.1115/1.1596238
  15. Luo X, Zhang Y, Peng J, et al. Impeller inlet geometry effect on performance improvement for centrifugal pumps[J]. Journal of mechanical science and technology, 2008, 22(10): 1971-1976. https://doi.org/10.1007/s12206-008-0741-x
  16. Hirschi R, Favre J N, Parkinson E, et al. Centrifugal pump performance drop due to leading edge cavitation: numerical predictions compared with model tests[J]. Journal of fluids engineering, 1998, 120(4): 705-711. https://doi.org/10.1115/1.2820727
  17. Batchelor G K. An introduction to fluid dynamics[M]. Cambridge university press, 2000.
  18. Zwart P J, Gerber A G, Belamri T. A two-phase flow model for predicting cavitation dynamics[C]//Fifth International Conference on Multiphase Flow, Yokohama, Japan. 2004.
  19. Mejri I, Belamri T, Bakir F, et al. Comparison of computational results obtained from a homogeneous cavitation model with experimental investigations of three inducers[J]. Journal of fluids engineering, 2006, 128(6): 1308-1323. https://doi.org/10.1115/1.2353265
  20. Zhou X, Zhang Y, Ji Z, et al. The Optimal Hydraulic Design of Centrifugal Impeller Using Genetic Algorithm with BVF[J]. International Journal of Rotating Machinery, 2014.

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