{"?xml":{"@version":"1.0"},"edm:RDF":{"@xmlns:dc":"http://purl.org/dc/elements/1.1/","@xmlns:edm":"http://www.europeana.eu/schemas/edm/","@xmlns:wgs84_pos":"http://www.w3.org/2003/01/geo/wgs84_pos","@xmlns:foaf":"http://xmlns.com/foaf/0.1/","@xmlns:rdaGr2":"http://rdvocab.info/ElementsGr2","@xmlns:oai":"http://www.openarchives.org/OAI/2.0/","@xmlns:owl":"http://www.w3.org/2002/07/owl#","@xmlns:rdf":"http://www.w3.org/1999/02/22-rdf-syntax-ns#","@xmlns:ore":"http://www.openarchives.org/ore/terms/","@xmlns:skos":"http://www.w3.org/2004/02/skos/core#","@xmlns:dcterms":"http://purl.org/dc/terms/","edm:WebResource":[{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-IYFFFRD7/7c61c4a7-ec06-408e-b9f4-8aecdd4facea/PDF","dcterms:extent":"2577 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-IYFFFRD7/b96547b0-9b4d-44d4-9801-5bd2b19b6839/TEXT","dcterms:extent":"35 KB"}],"edm:TimeSpan":{"@rdf:about":"1999-2025","edm:begin":{"@xml:lang":"en","#text":"1999"},"edm:end":{"@xml:lang":"en","#text":"2025"}},"edm:ProvidedCHO":{"@rdf:about":"URN:NBN:SI:doc-IYFFFRD7","dcterms:isPartOf":[{"@rdf:resource":"https://www.dlib.si/details/URN:NBN:SI:spr-6QOUKQ9A"},{"@xml:lang":"sl","#text":"Strojniški vestnik"}],"dcterms:issued":"2019","dc:creator":["Bergant, Anton","Božović, Boško","Karadžić, Uroš","Starinac, Danica"],"dc:format":[{"@xml:lang":"sl","#text":"letnik:65"},{"@xml:lang":"sl","#text":"številka:7/8"},{"@xml:lang":"sl","#text":"str. 430-440"}],"dc:identifier":["ISSN:0039-2480","COBISSID_HOST:16717851","URN:URN:NBN:SI:doc-IYFFFRD7"],"dc:language":"en","dc:publisher":{"@xml:lang":"sl","#text":"Zveza strojnih inženirjev in tehnikov Slovenije etc."},"dc:subject":[{"@xml:lang":"sl","#text":"ekstremno visoka Reynoldsova števila"},{"@xml:lang":"en","#text":"emergency shut-down"},{"@xml:lang":"en","#text":"high Reynolds number"},{"@xml:lang":"en","#text":"high-head hydropower plants"},{"@xml:lang":"sl","#text":"hitre zapore"},{"@xml:lang":"en","#text":"Pelton turbine"},{"@xml:lang":"sl","#text":"Peltonova turbine"},{"@xml:lang":"sl","#text":"visokotlačne hidroelektrarne"},{"@xml:lang":"sl","#text":"vodne turbine"},{"@xml:lang":"sl","#text":"vodni udar"},{"@xml:lang":"en","#text":"water hammers"}],"dcterms:temporal":{"@rdf:resource":"1999-2025"},"dc:title":{"@xml:lang":"sl","#text":"Water hammer investigation of shut-down of high-head hydropower plant at very high Reynolds number flows|"},"dc:description":{"@xml:lang":"sl","#text":"This paper investigates water hammer phenomena in a refurbished high-head hydropower plant Perućica, Montenegro during shut-down of the entire plant - simultaneous closure of the seven Pelton turbine units. In-situ measuring campaign during a number of steady and unsteady conditions has been performed on the plant's open channel, pressurized and tail race sub-systems with primarily goal to define measures that will enable achievement of the plant's installed capacity. In-house software written in Visual Fortran and based on the method of characteristics (MOC) has been developed. Closure of the Pelton turbine distributors is modelled by the two-speed closing law. Dissipation torques in turbine housing and shaft bearings are considered in calculation of the Pelton turbine unit rotational speed change. Numerical results given for standard quasi-steady and convolution based unsteady friction model are compared with results of measurements at flows with very high initial Reynolds numbers (larger than 10^7). Developed numerical model shows good agreement with the results of site measurements. It is shown that the unsteady friction has a small impact on pressure histories in Perućica HPP"},"edm:type":"TEXT","dc:type":[{"@xml:lang":"sl","#text":"znanstveno časopisje"},{"@xml:lang":"en","#text":"journals"},{"@rdf:resource":"http://www.wikidata.org/entity/Q361785"}]},"ore:Aggregation":{"@rdf:about":"http://www.dlib.si/?URN=URN:NBN:SI:doc-IYFFFRD7","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:doc-IYFFFRD7"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:doc-IYFFFRD7/7c61c4a7-ec06-408e-b9f4-8aecdd4facea/PDF"},"edm:rights":{"@rdf:resource":"http://rightsstatements.org/vocab/InC/1.0/"},"edm:provider":"Slovenian National E-content Aggregator","edm:intermediateProvider":{"@xml:lang":"en","#text":"National and University Library of Slovenia"},"edm:dataProvider":{"@xml:lang":"sl","#text":"Univerza v Ljubljani, Fakulteta za strojništvo"},"edm:object":{"@rdf:resource":"http://www.dlib.si/streamdb/URN:NBN:SI:doc-IYFFFRD7/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:doc-IYFFFRD7"}}}}