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dc.contributor.authorAgnalt, Einar
dc.contributor.authorSolemslie, Bjørn Winther
dc.contributor.authorStorli, Pål-Tore Selbo
dc.contributor.authorDahlhaug, Ole Gunnar
dc.date.accessioned2020-04-28T18:21:15Z
dc.date.available2020-04-28T18:21:15Z
dc.date.created2020-04-28T11:40:50Z
dc.date.issued2020
dc.identifier.citationInternational Journal of Fluid Machinery and Systems. 2020, 13 (2), 302-309.en_US
dc.identifier.issn1882-9554
dc.identifier.urihttps://hdl.handle.net/11250/2652831
dc.description.abstractOver the last years, several breakdowns in hydropower plants with low specific speed Francis runners have been reported. One of the main excitation forces in such runners is the pressure fluctuations originating from the rotor stator interaction. In this paper, the rotor-stator interaction has been analyzed utilizing pressure sensors onboard the runner. The pressure sensors were flush mounted in the hub of the runner and the signals were transmitted through a slip-ring system. The measurements have been analyzed relative to the runner angular position by utilizing an angular position sensor mounted to the shaft end. Measurements with different guide vane angle have been compared in order to study the potential flow interaction and the viscous wake effects for the pressure inside the runner. The results from the onboard pressure measurements found that the phase of the guide vane passing pressure seen by the onboard pressure sensors was independent of the guide vane opening. Hence, the potential flow interaction was found to be the dominant effect and no evidence from the viscous wake effect was found on the onboard pressure.en_US
dc.language.isoengen_US
dc.publisherInternational Association of Hydraulic Engineering and Researchen_US
dc.relation.urihttps://www.ntnu.edu/nvks/hifrancis
dc.titleThe Rotor-Stator Interaction Onboard a Low Specific speed Francis Turbineen_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.description.versionpublishedVersionen_US
dc.source.pagenumber302-309en_US
dc.source.volume13en_US
dc.source.journalInternational Journal of Fluid Machinery and Systemsen_US
dc.source.issue2en_US
dc.identifier.doi10.5293/IJFMS.2020.13.2.302
dc.identifier.cristin1808438
dc.relation.projectNorges forskningsråd: 254987en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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