20.500.12556/DKUM-77459 Zasnova aksialnega rotorja vetrne turbine in eksperimentalna analiza obratovalnih karakteristik diplomsko delo Design of axial wind turbine rotor and experimental performance analysis Diplomsko delo zajema načrtovanje geometrije vetrne turbine, izdelavo modela in primerjavo merilnih rezultatov vetrnih turbin z različnim številom lopatic. Geometrija vetrne turbine je oblikovana po Betzovi teoriji. Preden smo začeli z modeliranjem, je bilo treba določiti aerodinamični profil, dolžino tetive, nastavni kot in hitrostno število. Za pridobitev teh parametrov smo si pomagali s programom Xfoil in z enačbami iz literature. Za modeliranje smo uporabili programski paket Solidworks. V okviru diplomske naloge smo izdelali več 3D modelov vetrnih turbin. Premeri modelov merijo v CAD programu 280mm, razlikujejo pa se po številu lopatic. Modele smo natisnili s pomočjo 3D tiskalnika in nato z njimi opravili meritve na zračni progi v Laboratoriju za turbinske stroje na Fakulteti za strojništvo v Mariboru. Cilj diplomske naloge je primerjava obratovalnih karakteristik vetrnih turbin z različnim številom lopatic. Pri meritvah smo se osredotočili na primerjavo normiranih koeficientov moči c_pn in mehanske moči. Rezultati meritev kažejo da največji izkoristk doseže petkraka vetrna turbina , največjo moč pa trikraka vetrna turbina, sledi ji štirikraka in šele nato petkraka vetrna turbina. Iz meritev je razvidno kako pomembno je skrbno oblikovanje geometrije vetrne turbine The thesis includes the design of a wind turbine geometry, production of a model and the comparison of measurement results of wind turbines with different number of blades. The geometry of the wind turbine is shaped by Betz's theory. Before we started modeling it was necessary to determine the aerodynamic profile, chord length, blade twist angle and tip speed ratio. To obtain these parameters, we used the Xfoil program and equations from the literature. We used Solidworks software package for modeling. As part of the thesis we made several 3D models of wind turbines. The diameter of the wind turbine models measures 280mm and they differ in number of blades. The models were printed with a 3D printer and used to perform measurement on a test track in the Laboratory for turbine machines at the Faculty of Mechanical Engineering in Maribor. The goal of the thesis is to compare operating characteristics of wind turbines with different number of blades. We focused on the comparison of normalized power coefficients c_pn and mechanical power. Measurement results show that the highest efficiency is achieved with a five-bladed wind turbine, but the highest mechanical power is achieved with three-bladed wind turbine. The measurements also show the importance of careful design of the wind turbine geometry. Obnovljivi viri energije vetrna energija vetrna turbina geometrija lopatic modeliranje vetrnice primerjava Renewable energy wind energy wind turbine blade design modeling a wind turbine comparison true true false [Ž. Senekovič Žerjav] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2020-08-31 19:19:46 2020-09-24 12:01:49 2022-08-09 15:35:15 2020-11-19 03:25:23 2020 0 Maribor 0 Maribor IX, 50 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.548.4(043.2) 35688707 URN:SI:UM:DK:XZIX0SUH UN_Senekovic_Zerjav_Zan_2020.pdf UN_Senekovic_Zerjav_Zan_2020.pdf 1 6564DFCB25881C4669E97D168AFD711D 58d962e24d9e02a52835ec3b497c9733c78b12e1d938e771c142a99bbf854e04 d5cb952c-7c11-11eb-bb7a-00155d0001ca 20.500.12556/dkum/a6580236-9688-4341-aee5-e2a7bd69a535 https://dk.um.si/Dokument.php?lang=slv&id=145845 Fakulteta za strojništvo 0 0 0