206Numerical simulation of Crude oil fluid flow in a water centrifugal pump and flow investigation at design point and off-design conditions


This article presents a numerical investigation of fluid flow in one of the centrifugal pumps of pump-Iran corporation. A computational fluid dynamics (CFD) analysis is performed by using the CFX software for a wide range of volumetric flow rates for two different rotor speeds of 1450 rpm and 2900 rpm and the numerical results of water are validated against measured values of head and total efficiency with an overall acceptable agreement. The obtained results have been obtained for crude oil as diagrams of head and total efficiency as functions of volumetric flow rate and other variables and compared with results of water. Numerical results show that the absolute pressure on blade surfaces for crude oil is 705 kpa less than when using water. The absolute pressure differences between inlet and outlet of impeller and spiral volute for crude oil are comparatively less than those amounts in comparison with water. Also by increasing the angular velocity of rotor, it was observed that high levels of turbulence intensity are transmitted from outlet pipe bending to the impeller outlet at volumetric flow rate of 30 m3/h that causes the efficiency reduction and also high levels of turbulence intensity for crude oil are less than those amounts in comparison with water within impeller area. Finally, to represent a pump impeller head curve for crude oil over the overall operating range of the pump, a second order polynomial equation was fit to numerical data. 

Keywords: Numerical simulation, centrifugal pump, characteristic curve, Turbulence intensity, crude oil

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  • M. Ghaderi, A. F. Najafi, and A. Nourbakhsh, “Estimation of a centrifugal pump slip factors at offdesign conditions using computational fluid dynamics,” modares Mech. Eng., vol. 15, no. 3, pp. 199207, 2015. (in Persianفارسی )

  • H. Stel, G. D. L. Amaral, C. O. R. Negra, S. Chiva, V. Estevam,                         and R. E. M. Morales, “Numerical Analysis of the Fluid Flow in the First Stage of a Two-Stage Centrifugal Pump With a Vaned Diffuser,” journal of fluids engineering .vol. 135, no. July 2013, pp. 1–9, 2014.

  • M. H. Shojaeefard, M. Tahani, M. B. Ehghaghi, M. a. Fallahian, and M. Beglari, “Numerical study of the effects of some geometric characteristics of a centrifugal pump impeller that pumps a viscous fluid,” Comput. Fluids, vol. 60, pp. 6170, 2012.

  • H. Alemi, S. A. Nourbakhsh, M. Raisee, and A. F. Najafi, “Effects of Volute Curvature on Performance of a Low SpecificSpeed Centrifugal Pump at Design and OffDesign Conditions,” J. Turbomach., vol. 137, no. 4, p. 041009, 2015.

  • Z. Gao, W. Zhu, L. Lu, J. Deng, J. Zhang, and F. Wuang, “Numerical and Experimental Study of Unsteady Flow in a Large Centrifugal Pump With Stay Vanes,” J. Fluids Eng., vol. 136, no. 7, p. 071101, 2014.

  • M. Nataraj and R. Ragoth Singh, “Analyzing pump impeller for performance evaluation using RSM and CFD,” Desalin. Water Treat., vol. 52, no. 3436, pp. 68226831, 2014.

  • Y. Fu, J. Yuan, S. Yuan, G. Pace, L. dAgostino, P. Huang, and X. Li, “Numerical and Experimental Analysis of Flow Phenomena in a Centrifugal Pump Operating Under Low Flow Rates,” J. Fluids Eng., vol. 137, no. 1, p. 011102, 2014.

  • T. Mihalić, Z. Guzović, and A. Predin, “Performances and Flow Analysis in the Centrifugal Vortex Pump,” J. Fluids Eng., vol. 135, no. 1, p. 011107, 2013.

  • M. Vaezi and A. Kumar, “ScienceDirect The flow of wheat straw suspensions in an openimpeller centrifugal pump,” Biomass and Bioenergy, vol. 69, pp. 106123, 2014.

  • L. Jianfeng, D. Jing, Y. Jianping, and Y. Xiaoxi, “International Journal of Heat and Mass Transfer Steady dynamical behaviors of novel viscous pump with groove under the rotor,” Int. J. Heat Mass Transf., vol. 73, pp. 170176, 2014.

  • N. Moazami, K. Fukamachi, M. Kobayashi, N. G. Smedira, K. J. Hoercher, A. Massiello, S. Lee, D. J. Horvath, and R. C. Starling, “Axial and centrifugal continuousflow rotary pumps : A translation from pump mechanics to clinical practice,” J. Hear. Lung Transplant., vol. 32, no. 1, pp. 111, 2013.

  • A. Georgescu, S. Georgescu, C. Ioan, L. Hasegan, A. Anton, and D. Maria, “EPANET simulation of control methods for centrifugal pumps operating under variable system demand,” Procedia Eng., vol. 119, pp. 10121019, 2015.

  • H. M. ElBehery SM, “A comparative study of turbulence models performance for separating flow in a planar asymmetric diffuser,” Comput Fluids, vol. 44, no. 2, 2011.

  • Ansys.” p. Ansys workbench, 2015.

  • M. A. B. Jafarzadeh, A. Hajari, M. M. Alishahi, “The flow simulation of a low specific speed high speed centrifugal pump,” Appl. Math. Model., vol. 35, no. 242249, 2011.

  • pumps cataloguecentrifugal pumps-50-250 etha norm.” [Online]. Available: http://www.pumpiran.org/ecatalog/. [Accessed: 20-Oct-2015].

  • M. Tan, S. Yuan, H. Liu, Y. Wang, K. Wang, Numerical research on performance prediction for centrifugal pumps, Chinese journal of mechanical engineering, No. 1, pp. 21, 2010.