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Title: Sensitivity of the Winter-Kennedy method to different guide vane openings on an axial machine
Authors: Baidar B.
Nicolle J.
Gandhi, Bhupendra K.
Cervantes M.J.
Published in: Flow Measurement and Instrumentation
Abstract: This work studies the effects of guide vane openings (GVOs) on the Winter-Kennedy (WK) flow measurement method using CFD. The dependence of the WK coefficient with GVOs and its physical mechanism are presented. Although the WK method is reported to be sensitive to different factors including GVO, it is still unclear to which extent the GVO can be changed without modifying the WK coefficient significantly and the mechanism leading to such modification, if any. A numerical model of a Kaplan model turbine with a semi-spiral casing is developed and used to such purpose. Previously conducted experiments on the model turbine are used to validate the numerical results. The magnitude and behavior of the secondary flow are investigated together with the WK coefficients. The GVO is found to have an impact on the WK method, and the impact increases with the GVOs as the flow structure change. A suitable location to minimize the impact of the GVO is suggested. Furthermore, the theoretical WK constant with a suitable location and configuration are also presented; this can be useful in the absence of the measured WK coefficient. © 2019 Elsevier Ltd
Citation: Flow Measurement and Instrumentation (2019), 68(): -
Issue Date: 2019
Publisher: Elsevier Ltd
Keywords: CFD
Guide vane opening
ISSN: 9555986
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 ( ).
Corresponding Author: Baidar, B.; Department of Engineering Sciences and Mathematics, LuleÃ¥ University of TechnologySweden; email:
Appears in Collections:Journal Publications [ME]

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