20.500.12556/RUL-183390 Zasnova in numerična analiza aerodinamičnih zavihkov krila za Design/Build/Fly tekmovalno letalo Design and Numerical Analysis of Winglets for a Design/Build/Fly Competition Airplane V delu so predstavljene zasnova, izdelava in numerična analiza zavihkov krila brezpilotnega letala, razvitega za potrebe tekmovanja Design/Build/Fly. Preliminarna zasnova je obsegala 108 različnih konfiguracij, za katere smo aerodinamične vrednosti pridobili s programom analize potencialnega toka Flow5. Za enakovredno primerjavo je bila razvita lastna programska koda VETR, s pomočjo CFD simulacij v komercialnem paketu Ansys Fluent pa smo pridobljene podatke primerjali z rezultati predhodnih analiz. Namen detajlne zasnove je bila izbira radija zaokrožitve, aeroprofila in kota zasuka krajišča. Pokazali smo, da je optimiran zavihek v celotnem analiziranem območju izboljšal aerodinamično učinkovitost, ki je bila glavni optimizacijski parameter. Kljub določenim odstopanjem smo dokazali, da je panelna metoda primerna za uporabo v začetnih korakih zasnove, a je za zanesljivejše rezultate in podrobnejši vpogled v karakteristike tokovnega polja priporočljiva uporaba programov za računalniško dinamiko tekočin. V zaključku smo podali priporočila za implementacijo nove programske kode in morebitne izboljšave pri izvajanju CFD simulacij. This work presents the design, manufacturing, and numerical analysis of winglets for an unmanned aerial vehicle developed for the Design/Build/Fly competition. The preliminary design phase evaluated 108 different configurations, with aerodynamic data obtained using a potential flow solver Flow5. To ensure a consistent comparison, a custom software code called VETR was developed, while CFD simulations in Ansys Fluent were used to validate the acquired data against previous analyses. The detailed design phase aimed to select the optimal blending radius, airfoil, and tip twist angle. The results show that the optimized winglet improved aerodynamic efficiency, which was the primary optimization parameter, across the entire analysed envelope. Despite certain discrepancies, we demonstrated that the panel method is suitable for the initial stages of the design process; however, utilizing computational fluid dynamics software remains essential for more reliable results and a deeper insight into the flow field characteristics. Finally, recommendations for the implementation of the new software and potential improvements for conducting CFD simulations are provided. zavihki kril aerodinamika potencialni tok računalniška dinamika tekočin brezpilotni letalniki zasnuj/izdelaj/leti winglets aerodynamics potential flow computational fluid dynamics unmanned aerial vehicles design/build/fly true false false [M. Kravos] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-06-12 08:30:46 2026-06-12 08:30:58 2026-06-24 08:11:12 0000-00-00 00:00:00 2026 0 Ljubljana 0 XV, 59 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 629.7.036.7:533.6.04:532.5(043.2) 285689 282644995 47010.pdf 47010.pdf 1 754EDBB2C191C7DA5C0301D28C8C52C7 0acb494d95a9d5e1d3d2b1c889e7c02270b3a11b6233e39ec5fec9ab2cae452b 3fb050c2-6628-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=235424 Fakulteta za strojništvo 0 0 0