501 KB0 KB201320252025Bergant, AntonPekolj, Joštletnik:18številka:issue 4str. 189-202ISSN:1855-5748COBISSID_HOST:268892675URN:URN:NBN:SI:doc-86QGCT2XenFakulteta za energetikoUniversity of Maribor, University of Maribor PressJournal of energy technologybulb turbinecibulna turbinacomparison studycomputationfield testhidroelektrarnahydroelectric power plantizračunprimerjalna študijaterenski preizkusvodni udarwater hammerApproximate, numerical and experimental investigations of a water hammer in Vrhovo bulb-turbine hydroelectric power plant|This paper investigates the effectiveness and accuracy of approximate and numerical water hammer models in the Slovenian lower Sava River hydroelectric power plants with bulb turbines. An approximate model is introduced first, followed by numerical rigid water hammer models. Comparisons of the computed and measured results are examined for the transient load case of an emergency shutdown in Vrhovo hydroelectric power plant. The water hammer is mitigated by adjusting the guide vane and runner blade closing/opening laws properly. The results show a good agreement between the approximate and numerical and measured resultsV prispevku raziskujemo učinkovitost in natančnost približnih in numeričnih modelov vodnega udara v slovenskih hidroelektrarnah s cevnimi turbinami na reki Savi. Najprej so predstavljeni približni in numerični modeli togega vodnega udara. Rezultati izračuna so primerjani z rezultati meritev v hidroelektrarni Vrhovo. Izračunane in izmerjene vrednosti so primerjane za obratovalni režim nujne hitre zapore turbine. Vodni udar krmilimo z ustrezno nastavitvijo zakonov zapiranja/odpiranja lopatic vodilnika in gonilnika. Med približnimi in numeričnimi, in izmerjenimi rezultati obstaja dobro ujemanjeTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Mariboru, Fakulteta za energetiko