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dc.contributor.authorTrivedi, Chirag
dc.date.accessioned2021-04-09T11:23:13Z
dc.date.available2021-04-09T11:23:13Z
dc.date.created2021-04-06T07:58:30Z
dc.date.issued2021
dc.identifier.citationJournal of energy resources technology. 2021, 143 (8), .en_US
dc.identifier.issn0195-0738
dc.identifier.urihttps://hdl.handle.net/11250/2737127
dc.description.abstractThe energy market aims for high flexibility that allows guaranteed power to the consumers with minimum carbon footprint. Over the last three decades, hydropower has been a reliable and an efficient option to meet the fluctuating energy demand as it allows high-ramping rate and quick start-stop. However, such critical operations bring certain challenges for hydro turbines, i.e., high-amplitude stochastic loading and the fatigue. Credible investigation of unsteady pressure pulsations and their signature is important to understand the consequences. The present work aims to study pressure pulsations in a model Francis turbine, which is designed for the frequent start–stop operations. A total of 112 numerical simulations, across the hill diagram, are conducted. Pressure pulsations in the vaneless space, blade channels, and draft tube are investigated. The results show distinct patterns of rotor-stator interaction frequencies in the turbine. In the regions of high rotational speed and low flow rate, stochastic pulsations are predominant.en_US
dc.language.isoengen_US
dc.publisherASMEen_US
dc.titleStudy of pressure pulsations in a Francis turbine designed for frequent start-stopen_US
dc.typeJournal articleen_US
dc.description.versionsubmittedVersionen_US
dc.source.pagenumber19en_US
dc.source.volume143en_US
dc.source.journalJournal of energy resources technologyen_US
dc.source.issue8en_US
dc.identifier.doi10.1115/1.4050491
dc.identifier.cristin1902165
dc.relation.projectEC/H2020/764011en_US
dc.description.localcodeThis article will not be available due to copyright restrictions (c) 2020 by ASMEen_US
cristin.ispublishedtrue
cristin.fulltextpreprint
cristin.qualitycode1


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