Author:
Wei Yangyang,Shi Yuhui,Shi Weidong,Pan Bo
Abstract
Low specific speed centrifugal pumps are widely used in urban water supply, agricultural irrigation, petrochemical and other fields due to their small flow rate and high head. Therefore, the study of unsteady flow characteristics plays a vital role in its safe and stable operation. In this paper, numerical simulation and experimental methods are used to explore the unsteady performance of the pump. The results show that the fluctuations of the external characteristic such as head, shaft power and energy loss are due to the periodic disturbance of the flow field of pump. But the transient performance of shaft power and head shows different changing trends due to different influencing factors. In this paper, the transient process of hydraulic performance is divided into three stages according to the causes and characteristics of hydraulic fluctuations. Most of the hydraulic losses occur inside the impeller, so the impeller flow field determines the level of time average hydraulic performance. Although the hydraulic loss of the spiral case is small, it is greatly affected by the rotor-stator interaction, which affects the strength of the hydraulic fluctuation. This study is of great significance to the mechanism of rotor-stator interaction and the stable operation of low specific speed centrifugal pumps.
Funder
Jiangsu Province Universities Natural Sciences Foundation
Project of self-made experimental instruments and equipment of Jiangsu University
National Natural Science Foundation of China
National key research and development program
Subject
Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment,Geography, Planning and Development,Building and Construction
Reference31 articles.
1. Optimization Design of an Ultra-Low Specific-Speed Centrifugal Pump Using Entropy Production Minimization and Taguchi Method;Wang;Int. J. Fluid Mach. Syst.,2020
2. Numerical Investigation of Pressure Distribution in a Low Specific Speed Centrifugal Pump;Jia;J. Therm. Sci.,2018
3. Effect of cavitation and free-gas entrainment on the hydraulic performance of a centrifugal pump;Wang;Proc. Inst. Mech. Eng. Part A J. Power Energy,2020
4. Wei, Y., Yang, Y., Zhou, L., Jiang, L., Shi, W., and Huang, G. (2021). Influence of Impeller Gap Drainage Width on the Performance of Low Specific Speed Centrifugal Pump. J. Mar. Sci. Eng., 9.
5. Cavitating flow-induced unsteady pressure pulsations in a low specific speed centrifugal pump;Zhang;R. Soc. Open Sci.,2018
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献