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Numerical Study of the Winter–Kennedy Flow Measurement Method in Transient Flows
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0001-5833-6736
Institut de recherche d’Hydro-Québec (IREQ), Varennes, QC J3X 1S1, Canada.
Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee, Uttarakhand 247667, India.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0001-7599-0895
2020 (English)In: Energies, ISSN 1996-1073, E-ISSN 1996-1073, Vol. 13, no 6, article id 1310Article in journal (Refereed) Published
Abstract [en]

This paper explores the possibility of using the Winter–Kennedy (WK) method for transient flow rate measurement in hydraulic turbines. Computational fluid dynamic (CFD) analysis of a numerical model of an axial turbine was carried out for accelerating and decelerating flows. Those were obtained by linearly opening and closing of the guide vanes, respectively, while retaining the inlet pressure constant during the simulations. The behavior of several WK configurations on a cross-sectional plane and along the azimuthal direction of the spiral casing was studied during the transients. The study showed that there are certain WK configurations that are more stable than others. The physical mechanism behind the stability (or instability) of the WK method during transients is presented. Using the steady WK coefficient obtained at the best efficiency point (BEP), the WK method could estimate the transient flow rate with a deviation of about 7.5% and 3.5%, for accelerating and decelerating flow, respectively.

Place, publisher, year, edition, pages
MDPI, 2020. Vol. 13, no 6, article id 1310
Keywords [en]
Winter–Kennedy, flow rate, transient flow, hydropower, CFD
National Category
Fluid Mechanics and Acoustics
Research subject
Fluid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-78230DOI: 10.3390/en13061310ISI: 000528727500015Scopus ID: 2-s2.0-85081719186OAI: oai:DiVA.org:ltu-78230DiVA, id: diva2:1417338
Note

Validerad;2020;Nivå 2;2020-03-27 (alebob)

Available from: 2020-03-27 Created: 2020-03-27 Last updated: 2020-05-28Bibliographically approved
In thesis
1. A numerical investigation of the Winter-Kennedy method with application to axial turbines
Open this publication in new window or tab >>A numerical investigation of the Winter-Kennedy method with application to axial turbines
2020 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2020
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
National Category
Fluid Mechanics and Acoustics
Research subject
Fluid Mechanics
Identifiers
urn:nbn:se:ltu:diva-78632 (URN)978-91-7790-595-0 (ISBN)978-91-7790-596-7 (ISBN)
Public defence
2020-06-17, E632, Luleå, 13:00 (English)
Opponent
Supervisors
Available from: 2020-04-24 Created: 2020-04-23 Last updated: 2020-05-27Bibliographically approved

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Baidar, BinayaCervantes, Michel J.

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