Abstract
To analyse the influence of the start-up mode on the stability of the mixed-flow pump, start-up experiments are performed. And the external characteristic parameters, pressure fluctuation and shaft vibration data are collected by a multi-channel synchronous signal acquisition system during start-up. These data are analyzed by the time-frequency analysis method and wavelet partial coherence analysis method. Results reveal a positive correlation between the impeller angular acceleration and the time change rate of external characteristic parameters. During the start-up process, the variation law of the external characteristic parameters similar with the law of impeller rotating speed rise. The amplitude of the shaft vibration has a positive correlation with the start-up acceleration of the impeller. The influence of guide vane pressure fluctuations on the shaft vibrations is greater within 0∼2 s after the start of the mixed-flow pump. With the strart-up time extension, the partial coherence between the shaft vibration and the pressure fluctuations in guide vane is enhanced in low frequency band, which increases the risk of flow-induced vibration of the pump shaft.
Similar content being viewed by others
References
X. Ma, W. Song, Y. Shu and H. Chen, Transient characteristics of internal flow during the starting process of centrifugal pump, Journal of Mechanical, 38(12) (2021) 1546–1551.
Y. Xu, W. Xi and M. Yang, Numerical simulation of 3D unsteady turbulent flow in high-speed inducer, Drainage and Irrigation Machinery, 26(3) (2008) 59–63.
Z. Li, D. Wu, L. Wang, W. Dai and F. Chen, Experiment on instantaneous characteristics in centrifugal pump during startup period, Journal of Drainage and Irrigation Machinery Engineering, 28(5) (2010) 389–393.
R. Zhang and G. Guo, Experimental study on gas-liquid transient flow in liquid-ring vacuum pump and its hydraulic excitation, Vacuum, 171 (2020) 109025.
K. Kan, Q. Zhang and Z. Xu, Energy loss mechanism due to tip leakage flow of axial flow pump as turbine under various operating conditions, Energy, 255 (2022) 124532.
J. Feng, Z. Ge and Y. Zhang, Numerical investigation on characteristics of transient process in centrifugal pumps during power failure, Renewable Energy, 170 (2021) 267–276.
D. Wu and L. Wang, Study on cavitation behavior of highspeed mixed flow pump and cavitation performance improvement method, Transactions of the Chinese Society for Agricultural Machinery (9) (2006) 93–96.
Z. Liu, Q. Zhu, W. Yang and Y. Li, Transient characteristics of double-suction centrifugal pump during starting period under shut-off condition, Transactions of the Chinese Society for Agricultural Machinery, 46(10) (2015) 44–48+55.
H. Tsukamoto and O. Hashi, Transient characteristics of a centrifugal pump during starting period, ASME Journal of Fluid Engineering, 104(1) (1982) 6–13.
H. Tsukamoto, S. Matsunaga and H. Yoneda, Transient characteristics of a centrifugal pump during stopping perio, ASME Journal of Fluid Engineering, 108(4) (1986) 392–399.
J. Lefebvre and W. P. Barker, Centrifugal pump performance during transient operation, ASME Journal of Fluid Engineering, 117(2) (1995) 123–128.
B. Xu, Z. Li, D. Wu and L. Wang, Study on transient characteristics of centrifugal pump during starting period, Science-paper Online, 4(9) (2009) 644–649.
Y. Lu, L. Tan, Y. Han and M. Liu, Cavitation-vibration correlation of a mixed flow pump under steady state and fast start-up conditions by experiment, Ocean Engineering, 251 (2022) 111158.
Y. Lu, C. Ma, T. Lei and Y. Han, Theoretical model of transient mixed-flow pump start-up, Journal of Tsinghua University (Science and Technology), 62(12) (2022) 1938–1944.
W. Li, L. Lu, L. Ma, L. Ji and P. Wu, Experimental study on pressure vibration characteristics of mixed-flow pump during start-up, Transactions of the Chinese Society of Agricultural Engineering, 37(1) (2021) 44–50.
C. Luo, S. Zhang, J. Zheng and S. Wu, Study on hydrodynamic transient characteristics of mixed flow pump during startup, Chemical Engineering and Equipment (6) (2022) 7–9.
Q. Zhou, Q. Gu, Y. Huang and D. Zhang, Numerical and experimental research on cavitation of accelerating flow in mixed flow pump, Chinese Journal of Hydrodynamics, 36(3) (2021) 445–452.
X. Wu, Research on noise source recognition of tractor cab based on bias analysis, Master’s Thesis, Shandong University, ShanDong, China (2020).
Acknowledgments
This research is supported by the Science and Technology Innovation Fund of Hanjiang-to-Weihe River Valley Water Diversion Project Construction Co., Ltd., the Natural Science Projects of Shaanxi Education Department (No. 22JK0482), and the National Nature Science Foundation of China (Grant Nos. 51909212 and 52079108).
Author information
Authors and Affiliations
Corresponding author
Additional information
Guojun Zhu is an Associate Professor of the State Key Laboratory of Ecohydrau-lics in Northwest Arid Region, Xi’an University of Technology. He received his Ph.D. in Xi’an University of Tech-nology. His research interests include flow-induced vibration of hydraulic machine and the stability of hydraulic machine in transient process.
Rights and permissions
About this article
Cite this article
Tang, Z., Zhu, G., Feng, J. et al. Influence of pump start-up mode on the stability of mixed-flow pumps. J Mech Sci Technol 37, 2949–2958 (2023). https://doi.org/10.1007/s12206-023-0521-7
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12206-023-0521-7