20.500.12556/DKUM-97294 Approximate, numerical and experimental investigations of a water hammer in Vrhovo bulb-turbine hydroelectric power plant Približne, numerične in eksperimentalne raziskave vodnega udara v hidroelektrarni s cevnimi turbinami Vrhovo 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 results. V 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 ujemanje. hydroelectric power plant bulb turbine water hammer computation field test comparison study hidroelektrarna cibulna turbina vodni udar izračun terenski preizkus primerjalna študija true false true Angleški jezik Slovenski jezik Neznano 2026-02-26 13:54:33 2026-02-26 13:54:34 2026-02-27 03:17:46 0000-00-00 00:00:00 2025 0 0 str. 189-202 Št. 4 Letn. 18 dec. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2025-11-24 2025-12-02 2025-12-31 621.311.21 268892675 1855-5748 Approximate,_numerical_and_experi-Bergant-2025.pdf Approximate,_numerical_and_experi-Bergant-2025.pdf 1 1ADD56F172C2796D337B2823DE33CB6F 0ff2154037a70facbc7866a12ea5624152883ebe4bac791921a00b6fb287d375 dd77d19a-1312-11f1-94ed-00155d580e1a https://dk.um.si/Dokument.php?lang=slv&id=203956 https://journals.um.si/index.php/jet/article/view/5798/3543 0 f18f5ca3-1312-11f1-94ed-00155d580e1a https://dk.um.si/Dokument.php?lang=slv&id=203957 Fakulteta za energetiko Univerzitetna založba Univerze v Mariboru Journal of energy technology 0 0 0