NDLI: Experimental Investigation of Pressure Fluctuation and Vibration in a Large Francis Turbine

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Wang, Fujun Zhu, Yuliang Li, Xiaoqin Ma, Jiamei Wang, Liping Tang, Xuelin
Copyright Year	2007
Abstract	Vibration caused by unsteady flow usually leads to a problem of stability in operation for large hydraulic turbines. This paper reports the recent investigation and analysis of vibration and pressure fluctuation problem on a prototype 700MW Francis turbine unit at the Three-Gorges Hydropower Plant in China. The site investigation were carried out for a wide load range of 200–600MW at the condition of water head 57–76m. Significant vibrations were observed on head cover when the turbine was operated at load of 540–542MW with water head 68.3m. To identify the causes, investigations were done by measuring oscillations of the guide-bearing, pressure fluctuations under the head cover and in the draft tube. A special vibration zone at frequency of 4.56fn (fn is the runner rotation frequency) was found by further spectrum analysis for the vibrations and pressure fluctuations, while this special zone was not found in other turbines in the same site with same configurations. On the other hand, the low-frequency vibrations caused by pressure oscillations of vortex rope in draft tube were also measured and analyzed.
Sponsorship	Fluids Engineering Division
Starting Page	879
Ending Page	884
Page Count	6
File Format	PDF
ISBN	0791842894
DOI	10.1115/FEDSM2007-37432
e-ISBN	0791838056
Volume Number	Volume 2: Fora, Parts A and B
Conference Proceedings	ASME/JSME 2007 5th Joint Fluids Engineering Conference
Language	English
Publisher Date	2007-07-30
Publisher Place	San Diego, California, USA
Access Restriction	Subscribed
Subject Keyword	Water Spectroscopy Vibration Emission spectroscopy Stability Bearings Oscillations Francis turbines Unsteady flow Pressure Rotation Stress Hydroelectric power stations Hydraulic turbines China Ropes Vortices Fluctuations (physics) Engineering prototypes Turbines
Content Type	Text
Resource Type	Article

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