A Simulation Study of Hydraulic Vibration caused by Clearance Flow in a Pump Turbine. Issue 1 (1st September 2022)

• Record Type: Journal Article
• Authors: Hu, H P; Xia, M; Qiao, M; Wang, W; Wang, J Z; Wang, Z W
• Is Part Of: IOP conference series. Volume 1079:Issue 1(2022)
• Publication Date: 2022-09-01
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/1079/1/012032
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: The pumped-storage power station needs to adjust the load to meet the needs of the power grid at any time and cannot always operate under the best working conditions. In practical operation, vibration phenomenon with complex inducements occasionally occurs. In the stable operation of the Baishan energy storage power station, the headcover vibrates obviously. To find the cause of vibration, this paper modeled the unit flow area, used the numerical simulation method for steady and unsteady calculation, extracted the pressure fluctuation information in the flow field, and then analyzed the possibility of strong vibration caused by the instability of the flow field. The results show that there is a low frequency component of pressure fluctuation caused by the spiral motion of the fluid in the sealing groove in the upper canopy clearance flow, which may be the inducer of the vibration of the headcover.