Chen, Ting and Li, S. C.. (2011) Numerical investigation of guide-plate induced pressure fluctuations on guide vanes of Three Gorges turbines. Journal of Fluids Engineering, Vol.133 (No.6). article no. 061101. ISSN 0098-2202

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Abstract

A new type of cavitation triggered by boundary-layer turbulence-production has been identified from the turbines of the Three Gorges Power Station. Our previous studies point out that the addition of the 'guide-plate' is responsible for the increase of the turbulence level (in particular the low-frequency mode) in the free-stream which in turn promotes the boundary-layer transition through receptivity mechanism. A new vortex structure identified from our numerical studies is revealed in this paper. It explains well how the free-stream turbulence is influenced by this new vortex structure which is created by the addition of this 'guide-plate'. These results support one of the claims in the hypothesis proposed in our previous studies. The other claims in the hypothesis about the triggering mechanism of this type of cavitation in the boundary-layer are being verified through our on-going (numerical and experimental) studies. The numerical studies reported here are performed by using CFD simulations of the entire flow passage of the prototype turbine

Item Type:	Journal Article
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH):	Turbines, San Xia shui li shu niu (China), Pressure -- Measurement
Journal or Publication Title:	Journal of Fluids Engineering
Publisher:	ASME International
ISSN:	0098-2202
Date:	June 2011
Volume:	Vol.133
Number:	No.6
Page Range:	article no. 061101
Identification Number:	10.1115/1.4004257
Status:	Peer Reviewed
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/39980

Data sourced from Thomson Reuters' Web of Knowledge

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