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Title: Sensitivity of the Winter-Kennedy method to inlet and runner blade angle change on a Kaplan turbine
Authors: Baidar B.
Nicolle J.
Gandhi, Bhupendra K.
Cervantes M.J.
Published in: Proceedings of IOP Conference Series: Earth and Environmental Science
Abstract: The Winter-Kennedy (WK) method is a widely used index testing approach, which provides a relative or index value of the discharge that can allow to determine the on-cam relationship between blade and guide vane angles for Kaplan turbines. However, some discrepancies were noticed in previous studies using the WK approach. In this paper, a numerical model of a Kaplan model turbine is used to study the effects of upstream and downstream flow conditions on the WK coefficients. Experiment on the model turbine is used to validate unsteady CFD simulations. The CFD results show that the inflow condition affects the pressure distribution inside the spiral casing and hence the WK results. The WK coefficients fluctuate with high amplitude - suggesting using a larger sampling time for on-site measurement as well. The study also concludes that to limit the impact of a change in runner blade angle on the coefficients, the more suitable WK locations are at the beginning of the spiral casing with the inner pressure tap placed between stay vanes on the top wall. © 2019 Published under licence by IOP Publishing Ltd.
Citation: Proceedings of IOP Conference Series: Earth and Environmental Science, (2019)
Issue Date: 2019
Publisher: Institute of Physics Publishing
Keywords: Computational fluid dynamics
Hydraulic machinery
Hydraulic motors
Kaplan turbines
Turbomachine blades
Downstream flow
High amplitudes
Inflow conditions
Inner pressure
On-site measurement
Sampling time
Spiral casing
Unsteady cfd simulations
Turbine components
ISSN: 17551307
Author Scopus IDs: 57015636200
Author Affiliations: Baidar, B., Department of Engineering Sciences and Mathematics, LuleÃ¥ University of Technology, LuleÃ¥, 971 87, Sweden
Nicolle, J., Institut de Recherche d'Hydro-Québec, Varennes, QC J3X 1S1, Canada
Gandhi, B.K., Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee, India
Cervantes, M.J., Department of Engineering Sciences and Mathematics, Luleå University of Technology, Luleå, 971 87, Sweden
Funding Details: The research presented was carried out as a part of ‘Swedish Hydropower Centre-SVC†and supported by the “Swedish strategic research program StandUp for Energy. SVC has been established by the Swedish Energy Agency, Elforsk and Svenska Kraftnät together with LuleÃ¥ University of Technology, The Royal Institute of Technology (KTH), Chalmers University of Technology, and Uppsala University (
Appears in Collections:Conference Publications [ME]

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