20.500.12556/DKUM-93888 Analiza učinkovitosti športnega vesla glede na njegovo obliko z uporabo metode računalniške dinamike tekočin Analysis of the efficiency of a sports oar based on its shape using computational fluid dynamics V diplomskem delu je bila izvedena primerjava učinkovitosti športnih vesel s pomočjo simulacij računalniške dinamike tekočin. Kot glavni pokazatelj učinkovitosti vesla je bila upoštevana sila, ki deluje na veslo pri določeni hitrosti zaveslaja v smeri plovbe. Za lažjo primerjavo je bila pri vseh analiziranih vrstah vesel uporabljena enaka hitrost zaveslaja. Simulacije so bile opravljene v računskem volumnu ob uporabi robnih pogojev, s katerimi so bili simulirani realni pogoji pri športnem veslanju. Poleg rezultatov simulacij diplomsko delo vključuje tudi opis modeliranja, analizo kakovosti računskega območja in predstavitev uporabljenih robnih pogojev. Rezultati simulacije kažejo, da so najučinkovitejše oblike vesel vesla tipa »sekira«, kar je skladno z njihovo pogosto uporabo v praksi. Kot najuspešnejša se je izkazala oblika Sekira 2v3, vendar so razlike v učinkovitosti med vsemi tremi izvedbami lopatice tipa »sekira« zelo majhne in praktično zanemarljive. To pomeni, da vse analizirane izvedbe tega tipa dosegajo podobno visoko raven potisne učinkovitosti. In this thesis, a comparison of the efficiency of rowing oars was carried out using computational fluid dynamics (CFD) simulations. As the main indicator of paddle efficiency, the force acting on the paddle at a given stroke speed in the direction of travel was considered. For easier comparison, the same stroke rate was used for all analysed oar types. The simulations were performed within a computational domain using boundary conditions that approximated real conditions in sport rowing. In addition to the simulation results, the thesis also includes a description of the modelling process, an analysis of mesh quality, and a presentation of the applied boundary conditions. The simulation results indicate that the most efficient paddle blade shapes are of the "axe" type, which is consistent with their widespread use in practice. The most effective shape was found to be Sekira 2v3, although the differences in performance among all three "axe"-type blade designs are very small and practically negligible. This suggests that all analysed variants of this type achieve a similarly high level of thrust efficiency. računalniška dinamika tekočin (RDT) numerična analiza rotirajoča domena športno veslanje učinkovitost vesla computational fluid dynamics (CFD) numerical analysis rotating reference frame sport rowing oar efficiency true true false D. Lešnik Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-07-25 02:19:05 2025-09-25 15:10:03 2025-10-10 03:18:52 0000-00-00 00:00:00 2025 0 Maribor 0 Maribor 1 spletni vir (1 datoteka PDF (XI, 36 f.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 [519.6:532.5]:629.5.031.21(043.2) 252532227 UN_Lesnik_Domen_2025.pdf UN_Lesnik_Domen_2025.pdf 1 F9F51EB8D05B5425B9B83556B7EBF973 8be6d05fb38357b3c7e1eb323b97f4be45f0d7e7642763402b6647fe717afcd2 92254cbc-8cfe-11f0-9059-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=197928 Fakulteta za strojništvo 0 0 0