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Preliminary measurements of the radial velocity in the Francis-99 draft tube cone
Department of Energy and Process Engineering, Water Power Laboratory, Norwegian University of Science and Technology, Trondheim.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics. Department of Engineering Sciences and Mathematics, Luleå University of Technology.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics. Department of Energy and Process Engineering, Water Power Laboratory, Norwegian University of Science and Technology, Trondheim.ORCID iD: 0000-0001-7599-0895
Department of Energy and Process Engineering, Water Power Laboratory, Norwegian University of Science and Technology, Trondheim.
2015 (English)In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 579, no 1, article id 12014Article in journal (Refereed) Published
Abstract [en]

Two-dimensional particle image velocimetry (PIV) measurements in the draft tube cone of the Francis-99 model have been performed to complete the actual experimental data set with radial velocity data. The velocity profiles obtained presented some variation, which reason has not yet been identified. The presented results are therefore presented as preliminary until the reason is assessed. The axial velocity profiles corroborate well with the ones previously measured with laser Doppler velocimetry (LDV) for all operating points investigated. The radial velocity measured is small in magnitude for all operating points compared to the axial velocity. A gyroscopic effect induced by the swirl leaving the runner and the draft tube bend seems to induce an asymmetry in the draft tube cone.

Place, publisher, year, edition, pages
2015. Vol. 579, no 1, article id 12014
National Category
Fluid Mechanics and Acoustics
Research subject
Fluid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-34049DOI: 10.1088/1742-6596/579/1/012014Scopus ID: 84920711926Local ID: 826cfab1-79ce-4a73-a804-6fdeecce14b4OAI: oai:DiVA.org:ltu-34049DiVA, id: diva2:1007298
Conference
Francis-99 Workshop : Steady Operation of Francis Turbines 15/12/2014 - 16/12/2014
Note
Validerad; 2015; Nivå 1; 20150120 (andbra); Konferensartikel i tidskriftAvailable from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-30Bibliographically approved

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