Numerical Investigation of Vortex Generator on Controlling Flow Field of Centrifugal Pump Based on Response Surface Method

Qiu, N.; Li, M.; Wu, J.; Zhu, H.; Xu, P.

doi:10.47176/jafm.17.8.2293

Numerical Investigation of Vortex Generator on Controlling Flow Field of Centrifugal Pump Based on Response Surface Method

Document Type : Regular Article

Authors

Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, 212013, China

10.47176/jafm.17.8.2293

Abstract

The performance and life of centrifugal pumps can be severely impacted by cavitation. In this study, a vortex generator was placed on the blades of the first-stage impeller of a BB4 multistage centrifugal pump to investigate its effect on the local flow field. The response surface method was employed to design various solutions based on the vortex generator's arrangement position, height, and rotation angle and the optimum parameters were φ = 20°, θ = 10°, and h = 1.2114 mm. The results showed that a pressure rise occurred at the corresponding position of the vortex generator, and the pressure variation ranges from 1.99%-8.91%, which is closely related to the height parameter of the vortex generator. In the flow field near the vortex generator, the velocity increased and then decreased along the vertical direction of the blade wall, reaching a maximum height of 1.5 mm. Additionally, the low-velocity zone formed at the end of the vortex generator gradually became larger with the downward movement of the arrangement position, and its velocity varies in the range of about 1.5 m/s-15.7 m/s, and the pressure varies in the range of about 14,000 Pa-125,000 Pa. This research is crucial for understanding the cavitation control principle of vortex generators in centrifugal pumps.

Keywords

Main Subjects

Flow Control

References

Al-Obaidi, A. R. (2019). Investigation of effect of pump rotational speed on performance and detection of cavitation within a centrifugal pump using vibration analysis. Heliyon, 5(6). https://doi.org/10.1016/j.heliyon.2019.e01910

Al-Obaidi, A. R. (2023). Experimental diagnostic of cavitation flow in the centrifugal pump under various impeller speeds based on acoustic analysis method. Archives of Acoustics, 48(2), 159-170. https://doi.org/10.24425/aoa.2023.145234

Al-Obaidi, A. R. (2024). Effect of different guide vane configurations on flow field investigation and performances of an axial pump based on CFD analysis and vibration investigation. Experimental Techniques, 48(1), 69-88. https://doi.org/10.1007/s40799-023-00641-5

Al-Obaidi, A. R., & Alhamid, J. (2023). Investigation of the main flow characteristics mechanism and flow dynamics within an axial flow pump based on different transient load conditions. Iranian Journal of Science and Technology, Transactions of Mechanical Engineering, 1-19. https://doi.org/10.1007/s40997-022-00586-x

Al-Obaidi, A. R., & Qubian, A. (2022). Effect of outlet impeller diameter on performance prediction of centrifugal pump under single-phase and cavitation flow conditions. International Journal of Nonlinear Sciences and Numerical Simulation, 23(7-8), 1203-1229. https://doi.org/10.1515/ijnsns-2020-0119

Bilus, I., & Predin, A. (2009). Numerical and experimental approach to cavitation surge obstruction in water pump. International Journal of Numerical Methods for Heat & Fluid Flow, 19(7), 818-834. https://doi.org/10.1108/09615530910984091

Cao, W., Jia, Z., Zhao, Z., & Zhou, L. (2022). Validation and simulation of cavitation flow in a centrifugal pump by filter-based turbulence model. Engineering Applications of Computational Fluid Mechanics, 16(1), 1724-1738. https://doi.org/10.1080/19942060.2022.2111363

Cao, W., Wang, H., Yang, X., & Leng, X. (2023). Optimization of guide vane centrifugal pumps based on response surface methodology and study of internal flow characteristics. Journal of Marine Science and Engineering, 11(10), 1917. https://doi.org/10.3390/jmse11101917

Che, B., Cao, L., Chu, N., Likhachev, D., & Wu, D.
(2019a). Dynamic behaviors of re-entrant jet and cavity shedding during transitional cavity oscillation on NACA0015 hydrofoil. Journal of Fluids Engineering, 141(6), 061101. https://doi.org/10.1115/1.4041716

Che, B., Cao, L., Chu, N., Likhachev, D., & Wu, D.
(2019b). Effect of obstacle position on attached cavitation control through response surface methodology. Journal of Mechanical Science and Technology, 33, 4265-4279. https://doi.org/10.1007/s12206-019-0823-y

Che, B., Chu, N., Cao, L., Schmidt, S. J., Likhachev, D., & Wu, D. (2019c). Control effect of micro vortex generators on attached cavitation instability. Physics of Fluids, 31(6). https://doi.org/10.1063/1.5099089

Cheng, W., Shao, C., & Fan, H. (2023). Impacts of cavitation on flow field distributions and pump stability in cryogenic pumps. Journal of Low Temperature Physics, 211(1-2), 86-107. https://doi.org/10.1007/s10909-023-02944-8

Gu, Y., Ma, L., Yu, S., Yan, M., Wu, D., & Mou, J.
(2023). Surface cavitation flow characterization of jet hydrofoils based on vortex identification method. Physics of Fluids, 35(1). https://doi.org/10.1063/5.0126564

Huang, H. B., Long, Y., & Ji, B. (2020). Experimental investigation of vortex generator influences on propeller cavitation and hull pressure fluctuations. Journal of Hydrodynamics, 32, 82-92. https://doi.org/10.1007/s42241-020-0005-5

Kadivar, E., el Moctar, O., & Javadi, K. (2018). Investigation of the effect of cavitation passive control on the dynamics of unsteady cloud cavitation. Applied Mathematical Modelling, 64, 333-356. https://doi.org/10.1016/j.apm.2018.07.015

Kadivar, E., el Moctar, O., & Javadi, K. (2019). Stabilization of cloud cavitation instabilities using cylindrical cavitating-bubble generators (CCGs). International Journal of Multiphase Flow, 115, 108-125. https://doi.org/10.1016/j.ijmultiphaseflow.2019.03.019

Kadivar, E., Timoshevskiy, M. V., Pervunin, K. S., & el Moctar, O. (2020a). Cavitation control using cylindrical cavitating-bubble generators (CCGs): Experiments on a benchmark CAV2003 hydrofoil. International Journal of Multiphase Flow, 125, 103186. https://doi.org/10.1016/j.ijmultiphaseflow.2019.103186

Kadivar, E., Timoshevskiy, M. V., Pervunin, K. S., & Moctar, O. E. (2020b). Experimental and numerical study of the cavitation surge passive control around a semi-circular leading-edge flat plate. Journal of Marine Science and Technology, 25, 1010-1023. https://doi.org/10.1007/s00773-019-00697-2

Long, Y., An, C., Zhu, R., & Chen, J. (2021). Research on hydrodynamics of high velocity regions in a water-jet pump based on experimental and numerical calculations at different cavitation conditions. Physics of Fluids, 33(4). https://doi.org/10.1063/5.0040618

Long, Y., Han, H. Q., Ji, B., & Long, X. P. (2022). Numerical investigation of the influence of vortex generator on propeller cavitation and hull pressure fluctuation by DDES. Journal of Hydrodynamics, 34(3), 444-450. https://doi.org/10.1007/s42241-022-0032-5

Qian, C., Luo, X., Yang, C., & Wang, B. (2021). Multistage pump axial force control and hydraulic performance optimization based on response surface methodology. Journal of the Brazilian Society of Mechanical Sciences and Engineering, 43, 1-14. https://doi.org/10.1007/s40430-021-02849-1

Qiu, N., Zhou, W., Che, B., Wu, D., Wang, L., & Zhu, H. (2020). Effects of microvortex generators on cavitation erosion by changing periodic shedding into new structures. Physics of Fluids, 32(10). https://doi.org/10.1063/5.0021162

Song, P., Wei, Z., Zhen, H., Liu, M., & Ren, J. (2022). Effects of pre-whirl and blade profile on the hydraulic and cavitation performance of a centrifugal pump. International Journal of Multiphase Flow, 157, 104261. https://doi.org/10.1016/j.ijmultiphaseflow.2022.104261

Wang, C., Yao, Y., Yang, Y., Chen, X., Wang, H., Ge, J., Cao, W. & Zhang, Q. (2023). Automatic optimization of centrifugal pump for energy conservation and efficiency enhancement based on response surface methodology and computational fluid dynamics. Engineering Applications of Computational Fluid Mechanics, 17(1), 2227686. https://doi.org/10.1080/19942060.2023.2227686

Yan, L., Gao, B., Ni, D., Zhang, N., & Zhou, W. (2023). Numerical analysis of the influence of the non-uniform inflow induced by streamwise vortices on the cavitating flow around hydrofoil. Ocean Engineering, 278, 114324. https://doi.org/10.1016/j.oceaneng.2023.114324

Yu, A., Li, L., Zhou, D., & Ji, J. (2023). Large eddy simulation of the pulsation characteristics in the cavitating flow around a NACA0015 hydrofoil. Ocean Engineering, 267,113289. https://doi.org/10.1016/j.oceaneng.2022.113289

Zhao, G., Cao, L., Che, B., Wu, R., Yang, S., & Wu, D.
(2021). Towards the control of blade cavitation in a waterjet pump with inlet guide vanes: Passive control by obstacles. Ocean Engineering, 231, 108820. https://doi.org/10.1016/j.oceaneng.2021.108820

Zhao, W., & Zhou, Z. (2022). Influence of geometric parameters of tiny blades on the shroud of a centrifugal pump on the cavitation suppression effect. Frontiers in Energy Research, 10, 865885. https://doi.org/10.3389/fenrg.2022.865885

Zhao, Y., Li, G., Zhao, F., Wang, X., & Xu, W. (2023). Analysis of macroscopic cavitation characteristics of a self-excited oscillating cavitation jet nozzle. Journal of Applied Fluid Mechanics, 16(11), 2130-2141. http://doi.org/10.47176/jafm.16.11.1923

Zhou, J., He, D., Zhang, R., & Zhao, W. (2023). Research on the performance of a centrifugal aviation fuel pump based on response surface methodology. Processes, 11(11), 3055. https://doi.org/10.3390/pr11113055