International Journal of Fluid Machinery and Systems

Korean Society for Fluid machinery (한국유체기계학회)
권호 표지
DOI QR코드

DOI QR Code

CFD Analysis of Cavitation Phenomena in Mixed-Flow Pump

  • Received : 2011.12.16
  • Accepted : 2012.03.05
  • Published : 2012.03.31
Download PDF
⟨ Previous Next ⟩

Abstract

This paper deals with the CFD analysis of cavitating flow in the mixed-flow pump with the specific speed of 1.64 which suffers from a high level of noise and vibrations close to the optimal flow coefficient. The ANSYS CFX package has been used to solve URANS equations together with the Rayleigh-Plesset model and the SST-SAS turbulence model has been employed to capture highly unsteady phenomena inside the pump. The CFD analysis has provided a good picture of the cavitation structures inside the pump and their dynamics for a wide range of flow coefficients and NPSH values. Cavitation instabilities were detected at 70% of the optimal flow coefficient close to the NPSH3 value (NPSH3 is the net positive suction head required for the 3% drop of the total head of the pump).

Keywords

References

  1. Os, M.J., Op de Woerd, J.G.H and Jonker, J.B. ,1997, "A Parametric Study of the Cavitation Inception Behaviour of a Mixed- Flow Pump Impeller Using a Three-Dimensional Potential Flow Model," Proc. ASME FEDSM97-3374.
  2. Nagahara, T., Sato, T and Okamura, T.. 2001, "Effect of the Submersed Vortex Cavitation Occurred in Pump Suction Intake on Hydraulic Forces of Mixed Flow Pump Impeller," CAV2001:sessionB8.006, pp. 1-8.
  3. Sedlar, M., 2001, "Numerical Investigation of Flow in Mixed-Flow Pump with Volute," TASK QUARTERLY 5, No. 4, pp. 595-602.
  4. Sedlar, M., Marsik, F. and Safarik, P., 2002, "Numerical Analysis of Cavitated Flows in Mixed-Flow Pump Impellers," Proc. Proc 3rd Int. Conference on Transport Phenomena in Multiphase Systems, Heat 2002, pp. 461-466.
  5. Sedlar, M., Zima, P. and Muller, M., 2009, "CFD Analysis of Cavitation Erosion Potential in Hydraulic Machinery," Proc. 3rd IAHR WG Meeting 2009, pp. 205-214.
  6. Oh, H.W., (2010, "Design Parameter to Improve the Suction Performance of Mixed-Flow Pump Impeller," Proc. IMechE Vol. 224, Part A: J. Power and Energy, JPE986, pp. 881-887.
  7. Harada, I., Kobayashi, K. and Ono, S., 2010, "Prediction of Axial Thrust for Mixed-Flow Pumps with Vaned Diffuser by Using CFD," Int. Journal of Fluid Machinery and Systems, Vol. 3, No. 2, pp. 160-168.
  8. Kobayashi, K. and Chiba, Y., 2010, "Computational Fluid Dynamics of Cavitating Flow in Mixed Flow Pump with Closed Type Impeller. Int. Journal of Fluid Machinery and Systems," Vol. 3, No. 2, pp. 113-121. https://doi.org/10.5293/IJFMS.2010.3.2.113
  9. Yamamoto, K. and Tsujimoto, Y., 2009, "Backflow Vortex Cavitation and Its Effects on Cavitation Instabilities. Int. Journal of Fluid Machinery and Systems," Vol. 2, No. 1, pp. 40-54. https://doi.org/10.5293/IJFMS.2009.2.1.040
  10. Kamijo, K., Shimura, T. and Watanabe, M., 1977, "An Experimental Investigation of Cavitating Inducer Instability," ASME Paper 77-WA/FW-14.
  11. Tsujimoto, Y., Yoshida, Y., Maekawa, M., Watanabe, S. and Hashimoto, T., 1997, "Observations of Oscillating Cavitation of an Inducer," ASME Jour. Fluids Engng. , 119, No. 4, pp. 775-781. https://doi.org/10.1115/1.2819497
  12. Brennen, C.E., 1994, Hydrodynamics of Pumps. Concepts Eti & Oxford University Press.
  13. Tsujimoto, Y., Kamijo, K. and Yoshida Y., 1993, "A Theoretical Analysis of Rotating Cavitation in Inducers," ASME Jour. Fluids Engng., 115, No. 1, pp. 135-141. https://doi.org/10.1115/1.2910095
  14. Tsujimoto, Y., 2006, "Cavitation Instabilities in Inducers," Design and Analysis of High Speed Pumps, Educational Notes RTO-EN-AVT-143, Paper 8, pp. 8-1 - 8-26.
  15. Berntsen, G.., Kjeldsen, M. and Muller, R., 2001, "Cavitation Induced Dynamics in Hydraulic Macinery," Proc. 10th IAHR WG Meeting on the Behaviour of Hydraulic Machinery under Steady Oscillatory Conditions, pp. 1-8.
  16. Bouziad, Y.A., 2005, "Physical Modelling of Leading Edge Cavitation: Computational Methodologies and Application to Hydraulic Machinery," Ecole Polytechnique Federale de Lausane, Thesis No. 3353.
  17. Tsujimoto, Y., 2005, "Tip Leakage and Backflow Vortex Cavitation," Proc. CISM Advanced School on Fluid Dynamics of Cavitation and Cavitating Turbopumps.
  18. Tsujimoto, Y., Horiguchi, H. and Yonezawa, K., 2010, "Cavitation Instabilities in Turbopump Inducers. Analyses in 1-3 Dimensions," Int. Journal of Fluid Machinery and Systems, Vol. 3, No. 2, pp. 170-180.
  19. Menter, F.R., Kuntz, M. and Bender, R., 2003, "A Scale-Adaptive Simulation Model for Turbulent Flow Prediction," AIAA paper 2003-0767.
  20. Sedlar, M., Bajorek, M. and Soukal, J., 2007, "Investigation of Cavitation Phenomena in Suction Part of Radial-Flow Pump," Proc. 7th European Conference on Turbomachinery, pp. 785-794.

Cited by

  1. Effects of blade rotation angle deviations on mixed-flow pump hydraulic performance vol.57, pp.7, 2014, https://doi.org/10.1007/s11431-014-5567-4
  2. Numerical prediction of impacts of cavitation in pumps for power generation vol.62, pp.6, 2015, https://doi.org/10.1134/S0040601515060087
  3. Numerical Analysis of Unsteady Cavitating Flow around Balancing Drum of Multistage Pump vol.9, pp.2, 2016, https://doi.org/10.5293/IJFMS.2016.9.2.119
  4. Numerical and experimental research on unsteady cavitating flow around NACA 2412 hydrofoil vol.72, pp.2, 2015, https://doi.org/10.1088/1757-899X/72/2/022014
  5. Numerical Simulation of Interaction between Fluid and Vapor Structures in Multiphase Flow around Hydrofoil vol.06, pp.08, 2018, https://doi.org/10.4236/jamp.2018.68137
  6. Pressure fluctuation characteristics of centrifugal pump at low flow rate vol.163, pp.1755-1315, 2018, https://doi.org/10.1088/1755-1315/163/1/012023
  7. Investigation of Pumped Storage Hydropower Power-Off Transient Process Using 3D Numerical Simulation Based on SP-VOF Hybrid Model vol.11, pp.4, 2018, https://doi.org/10.3390/en11041020
  8. Effect of a Nonuniform Radial/Axial Tip Clearance on the Flow Field in a Mixed-Flow Pump vol.50, pp.1, 2018, https://doi.org/10.1007/s11223-018-9952-2