20.500.12556/ReVIS-12353 NUMERIČNA ANALIZA IN IZRAČUN ENERGETSKIH KARAKTERISTIK FRANCISOVE TURBINE NUMERICAL ANALYSIS AND CALCULATION OF ENERGY CHARACTERISTIC OF A FRANCIS TURBINE Francisove turbine so ključen člen hidroelektrarne. Z uporabo Francisove turbine pretvarjamo potencialno energijo vode v mehansko energijo, ki pa se nato na generatorju pretvori v električno energijo. Ker se danes države zavezujejo h koriščenju obnovljivih virov energije, je zelo pomembno, da sistemi, ki bazirajo na njej, delujejo čim bolj optimalno ter s čim večjim izkoristkom. To se navezuje tudi na vodne turbine, kjer pravilno oblikovan gonilnik Francisove turbine ključno vpliva na doseganje visokega izkoristka, večjega kot 95 %. V diplomski nalogi je bil razvit model gonilnika Francisove turbine ter nato na podlagi numeričnih analiz dodatno izpopolnjen do te mere, da dosega izkoristke večje od 94 %. Numerični rezultati vseh štirih modelov so prikazani v obliki vektorjev hitrosti, tokovnic ter porazdelitve tlaka po površini lopatic gonilnika. Na podlagi rezultatov so bile izrisane karakteristične krivulje izkoristka in moči na vseh štirih modelih gonilnika Francisove turbine. Francis turbines represent a fundamental component of hydroelectric power plants. Through the application of a Francis turbine, the potential energy of water is converted into mechanical energy, which is subsequently transformed into electrical energy via a generator. As nations increasingly commit to the utilization of renewable energy sources, it is imperative that such systems operate at optimal performance and with the highest possible efficiency. This is particularly relevant for hydraulic turbines, where the precise design of the Francis turbine runner plays a pivotal role in achieving efficiency levels exceeding 95 %. In this thesis, a model of the Francis turbine runner was developed and refined through numerical simulations to achieve efficiency levels greater than 94 %. The numerical results for all four runners are presented in terms of velocity vectors, streamlines, and pressure distributions across the blade surfaces. Based on these results, characteristic efficiency and power curves were generated for each of the four Francis turbine runners. turbina gonilnik lopatice hitrostni trikotnik volumenski pretok višinska razlika vrtilni moment izkoristek totalni tlak turbine runner blades velocity triangle volumetric flow head torque efficiency total pressure true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-10-03 17:47:28 2025-10-03 17:47:28 2025-10-25 11:19:31 0000-00-00 00:00:00 2025 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 5829 254745091 DIP_Klemenic_Nik_2025.pdf DIP_Klemenic_Nik_2025.pdf 1 C420B3891382F44D8BA2EEABBC1F000A 468447550b2e7e27ce7103d3e957cbae387718ad85e5d85d9dca1fd696bb745c 43d56eeb-a070-11f0-9bb7-001a4af901a5 https://revis.openscience.si/Dokument.php?lang=slv&id=14462 Univerza v Novem mestu - Fakulteta za strojništvo 0 0 0