INVESTIGATE THE INFLUENCE OF THE ROTATION SPEEDS ON THE HEAD, POWER,  AND EFFICIENCY OF THE CENTRIFUGAL PUMP IMPELLER

Le Van Tien

Le Van Tien University of Economics and Industrial Technology

Keywords: Centrifugal pump, impeller, Ansys CFX, computational fluid dynamics CFD

Abstract

Centrifugal pumps are more and more widely used in life and in agricultural and industrial production. The pump helps to move the liquid from one place to another by using the energy from the drive motor to drive the fluid through the impeller. This study focuses on investigating the influence of rotation speed on pump parameters such as head, capacity, and efficiency. Design and simulation were carried out using Ansys CFX software, using the Navier-Stokes equation. The shear stress transport (SST) model was chosen to model turbulent flow in the impeller. From the simulation results, it can be seen that as the rotation speed of the impeller increases, the pressure inside the impeller increases. The pressure increases gradually from the inlet to the outlet of the impeller.

References

Gulich JF. Centrifugal pumps. 4th ed. Villeneuve, Switzerland: Springer Nature Switzerland AG; 2020.

Mahmood MA. The effect of rotational speed variation on the velocity vectors in the single blade passage centrifugal pump (part 2), IOSR J Mech Civ Eng, 2013, Volume 9, pp. 43–52. https://doi.org/10.9790/1684-0924352.

Bai L, Zhou L, Han C, Zhu Y, Shi W. Numerical Study of Pressure Fluctuation and Unsteady Flow in a Centrifugal Pump. Processes, 2019, Volume 7, pp. 1–14. https://doi.org/doi:10.3390/pr7060354.

Meng F, Pei J, Yuan S, Luo Y, Chen J. Effect of two diffuser types of volute on pressure fluctuation in centrifugal pump under part-load condition. Open Arch 16th Int Symp Transp Phenom Dyn Rotating Mach ISROMAC, 2019. https://doi.org/10.1142/9789813220362_0110.

Botia GCP, León JAP, Abril MSO. Numerical simulation to analyze the physical behavior of centrifugal pumps as a turbine. J Phys Conf Ser, 2021, pp. 21-39. https://doi.org/10.1088/17426596/2139/1/012007.

Pavlenko I, Kulikov O, Ratushnyi O, Ivanov V, Piteľ J, Kondus V. Effect of Impeller Trimming on the Energy Efficiency of the Counter-Rotating Pumping Stage. Appl Sci, 2023, pp. 13. https://doi.org/10.3390/app13020761.

Li Q, Li S, Wu P, Huang B, Wu D. Investigation on Reduction of Pressure Fluctuation for a Double-Suction Centrifugal Pump, Chinese J Mech Eng (English Ed), 2021, pp. 2-18. https://doi.org/10.1186/s10033-020-00505-8.

Bai Y, Kong F, Xia B, Liu Y. Effect of blade number matching of impeller and diffuser in high-speed rescue pump. Adv Mech Eng 2017, Volume 9, pp. 1–12. https://doi.org/10.1177/1687814017703595.

Bacharoudis EC, Filios AE, Mentzos MD, Margaris DP. Parametric Study of a Centrifugal Pump Impeller by Varying the Outlet Blade Angle. Open Mech Eng J, 2008, Volume 7, pp. 75–83. https://doi.org/10.2174/1874155x00802010075.

Alemi H, Nourbakhsh SA, Raisee M, Najafi AF. Effects of volute curvature on performance of a low specific-speed centrifugal pump at design and off-design conditions. J Turbomach, 2015, Volume 137, pp. 1–10. https://doi.org/10.1115/1.4028766.

Ding H, Li Z, Gong X, Li M. The influence of blade outlet angle on the performance of centrifugal pump with high specific speed. Vacuum, 2019, Volume 159, pp. 239–246. https://doi.org/10.1016/j.vacuum.2018.10.049.

Menter FR. Two-equation eddy-viscosity turbulence models for engineering applications. AIAA J, 1994, Volume 32, pp. 1598–1605. https://doi.org/10.2514/3.12149.

R. Menter F. Zonal Two Equation k-w Turbulence Models For Aerodynamic Flows. AIAA, 1993, Volume 93, pp. 1–21. https://doi.org/10.1142/9789812774071_0006.

Menter FR. Review of the shear-stress transport turbulence model experience from an industrial perspective. Int J Comut Fluid Dyn, 2009, Volume 23, pp. 305–316. https://doi.org/10.1080/10618560902773387.

ANSYS Inc. ANSYS Fluent Meshing User’s Guide, Ansys, 2015, vol. 15317.