Study on the Cavitation Performances and Unsteady Characteristics of a Centrifugal Fire Pump

Hao, J.; Yu, C.; Fu, Y.; Zhang, P.; Hou, D.; Shen, Y.; Yuan, J.

doi:10.47176/jafm.18.12.3577

Study on the Cavitation Performances and Unsteady Characteristics of a Centrifugal Fire Pump

Document Type : Regular Article

Authors

¹ National Research Center of Pump, Jiangsu University, Zhenjiang 212013, Jiangsu, China

² School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China

³ Shanghai Kaiquan Pump (Group) Co. Ltd., Jiading 4255/4287, Shanghai, China

⁴ Zhenjiang Fire and Rescue Division, Zhenjiang 212000, Jiangsu, China

10.47176/jafm.18.12.3577

Abstract

Centrifugal fire pumps are critical for firefighting systems but suffer from cavitation and instability under off-design conditions. However, systematic analyses of their flow-rate-dependent dynamics remain limited. This study systematically investigates the hydraulic performance, cavitation characteristics, and dynamic pressure pulsations of a centrifugal fire pump under various flow conditions (50%–150% of the design flow rate) through combined numerical simulations and experiments. Steady simulations were conducted using the standard κ-ε turbulence model, while unsteady simulations were performed with a 2° angular time step to capture the transient interactions between the impeller and the volute as well as the resulting dynamic pressure pulsations. Key results revealed that: At low flow (60% Q_d)， Radial force amplitudes increased by 40%, accompanied by 9.86 Hz low-frequency pulsations attributed to backflow-induced instabilities; At high flow (150% Q_d), The critical cavitation number σ₃% surged to 0.961, indicating a 2.6-fold cavitation risk compared to the design condition (σ₃% = 0.376); The findings provide actionable strategies for optimizing pump design and operational stability in firefighting systems.

Keywords

Main Subjects

Computational Fluid Dynamics

References

Elyamin, G. R. A., Bassily, M. A., Khalil, K. Y., & Gomaa, M. S. (2019). Effect of impeller blades number on the performance of a centrifugal pump. Alexandria Engineering Journal, 58(1), 39-48. https://doi.org/10.1016/j.aej.2019.02.004

ANSYS Inc. (2012). Theory Reference. ANSYS Inc.

Bakir, F., Rey, R., Gerber, A. G., Belamri, T., & Hutchinson, B. (2004). Numerical and experimental investigations of the cavitating behavior of an inducer. International Journal of Rotating Machinery, 10(1), 15-25. https://doi.org/10.1155/s1023621x04000028

Bozorgasareh, H., Khalesi, J., Jafari, M., & Gazori, H. O. (2021). Performance improvement of mixed-flow centrifugal pumps with new impeller shrouds: numerical and experimental investigations. Renewable Energy, 163(Pta1), 635-648. https://doi.org/10.1016/j.renene.2020.08.104

Brennen, C. E. (2012). A review of the dynamics of cavitating pumps. IOP Conference Series Earth and Environmental Science, 15(1), 2001. https://doi.org/10.1088/1755-1315/15/1/012001

Dai, C., Ge, Z., Dong, L., & Zhu, J. (2022). Study on noise characteristics of marine centrifugal pump under different cavitation stages. Iranian Journal of Science and Technology, Transactions of Mechanical Engineering, 1-15. https://doi.org/10.1007/s40997-020-00390-5

Fu, Y., Fang, Y., Yuan, J., Yuan, S., Pace, G., & Dagostino, L. (2016). Study on Hydraulic Performances of a 3‐Bladed Inducer Based on Different Numerical and Experimental Methods. International Journal of Rotating Machinery, 2016(1), 4267429. https://doi.org/10.1155/2016/4267429

Fu, Y., Fan, M., Pace, G., Valentini, D., Pasini, A., & d’Agostino, L. (2018, July). Experimental and numerical study on hydraulic performances of a turbopump with and without an inducer. Fluids Engineering Division Summer Meeting (Vol. 51579, p. V003T12A032). American Society of Mechanical Engineers. https://doi.org/10.1115/FEDSM2018-83506

Huan, Y. Y., Liu, Y. Y., Li, X. J., Zhu, Z. C., Qu, J. T., Zhe, L., & Han, A. D. (2021). Experimental and numerical investigations of cavitation evolution in a high-speed centrifugal pump with inducer. Journal of Hydrodynamics, 33(1), 140-149. https://doi.org/10.1007/s42241-021-0006-z

International Organization for Standardization (1999). *ISO 9906:1999 - Rotodynamic pumps — Hydraulic performance acceptance tests — Grades 1 and 2*. https://doi.org/10.3403/30202352

Jia, X., Yang, X., & Zhu, Z. (2024). Study on pressure pulsations and transient fluid forces in centrifugal pump under different degrees of cavitation. Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 238(6), 2834-2844. https://doi.org/=10.1177/09544089231164832

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

Lu, J., Chen, Q., Liu, X., Zhu, B., & Yuan, S. (2022). Investigation on pressure fluctuations induced by flow instabilities in a centrifugal pump. Ocean Engineering, 258, 111805. https://doi.org/10.1016/j.oceaneng.2022.111805

Lu, J., Liu, J., Qian, L., Liu, X., Yuan, S., Zhu, B., & Dai, Y. (2023). Investigation of pressure pulsation induced by quasi-steady cavitation in a centrifugal pump. Physics of Fluids, 35 (2), 025119.https://doi.org/10.1063/5.0135095

Nolan, D. P. (2011). Fire fighting pumping systems at industrial facilities. Fire Fighting Pumping Systems at Industrial Facilities, 215–220. https://doi.org/10.1016/B978-081551428-2.50025-X

Oro, J. M. F., Perotti, R. B., Vega, M. G., & Gonzalez, J. (2023). Effect of the radial gap size on the deterministic flow in a centrifugal pump due to impeller-tongue interactions. Energy, 278, 127820. https://doi.org/10.47176/jafm.15.06.1303

Osman, F. K., Zhang, J., Lai, L., & Kwarteng, A. A. (2022). Effects of turbulence models on flow characteristics of a vertical fire pump. Journal of Applied Fluid Mechanics, 15(6), 1661-1674. https://doi.org/10.47176/jafm.15.06.1303

Palgrave, R. (2003). Troubleshooting Centrifugal Pumps And Their Systems. 1-I. https://doi.org/10.1016/B978-185617391-9/50018-6

Ramirez, R., Avila, E., Lopez, L., Bula, A., & Forero, J. D. (2020). CFD characterization and optimization of the cavitation phenomenon in dredging centrifugal pumps. Alexandria Engineering Journal, 59(1), 291-309. https://doi.org/10.1016/j.aej.2019.12.041

Ruggeri, R. S., & Moore, R. D. (1969). Method for prediction of pump cavitation performance for various liquids, liquid temperatures, and rotative speeds. National Aeronautics and Space Administration.

Skrzypacz, J., J., & Bieganowski, M. (2018). The influence of micro grooves on the parameters of the centrifugal pump impeller. International Journal of Mechanical Sciences, 144, 827-835. https://doi.org/10.1016/j.ijmecsci.2017.01.039

Sonawat, A., Kim, S., Ma, S. B., Kim, S. J., Lee, J. B., Yu, M. S., & Kim, J. H. (2022). Investigation of unsteady pressure fluctuations and methods for its suppression for a double suction centrifugal pump. Energy, 252, 124020. https://doi.org/10.1016/j.energy.2022.124020

Song, Y., Zhang, T., Liu, Q., Ge, B., Liu, J., & Zhang, L. (2024). Cavitation identification method of centrifugal pumps based on signal demodulation and EfficientNet. Arabian Journal for Science and Engineering, 1-15. https://doi.org/10.1007/s13369-024-09193-1

International Association of Fire and Rescue Services (CTIF). (2014). World fire statistics: Information bulletin of the World (Report No. 19).

https://mail.ctif.org/sites/default/files/ctif_report19_world_fire_statistics_2014.pdf

Xianwei, L. I. U., Jiangfeng, F. U., Junjie, Y. A. N. G., Dewen, Y. I. N., Zhenhua, Z. H. O. U., & Huacong, L. I. (2024). Numerical simulation research on multiphase flow of aviation centrifugal pump based on OpenFOAM. Chinese Journal of Aeronautics, 37(4), 256-275. https://doi.org/10.1016/j.cja.2023.11.016

Yousefi, H., Noorollahi, Y., Tahani, M., Fahimi, R., & Saremian, S. (2019). Numerical simulation for obtaining optimal impeller's blade parameters of a centrifugal pump for high-viscosity fluid pumping. Sustainable Energy Technologies and Assessments, 34(AUG.), 16-26. https://doi.org/10.1016/j.seta.2019.04.011

Zhu, Y., Zhou, L., Lv, S., Shi, W., Ni, H., Li, X., ... & Hou, Z. (2023). Research progress on identification and suppression methods for monitoring the cavitation state of centrifugal pumps. Water, 16(1), 52. https://doi.org/10.3390/w16010052.