20.500.12556/DKUM-85345 Numerično modeliranje aerodinamike sledilnega obročka goloba diplomsko delo Numerical modeling of pigeon ring tracker aerodynamics V diplomski nalogi se ukvarjamo s področjem aerodinamike, ki je pomembna s stališča optimalne oblike obravnavanega telesa med gibanjem v zraku glede na zmanjšanje sile upora med gibanje. Z zmanjšanjem sile upora se pri gibanju telesa zmanjša potrebna energija za gibanje oziroma se pri enaki količini vložene energije telo premika hitreje in naredi daljšo pot. V sami nalogi sem se osredotočil na aerodinamiko ptice (goloba), ki ima nameščeni označevalni in zasledovalni obroček. V diplomski nalogi smo se osredotočili na nekaj različnih geometrij, in sicer označevalnega in sledilnega obročka brez upoštevanja da sta nameščena na goloba, nato smo izvedli preračune samega goloba brez obročkov in na koncu še goloba z obema opazovanima obročkoma. Za potrebe numeričnih preračunov in določevanja računske natančnosti smo izdelali simulacije z različnimi gostotami mrež in tako ugotovili red napake, ki ga vnašamo v vse simulacije zaradi uporabe redkejših računskih mrež vsled omejitve računskega časa. Rezultati preračunov so prikazani v obliki tokovnih polj s porazdelitvijo hitrosti po okolici opazovanih predmetov, porazdelitvijo tlaka na površinah in tokovnic okoli opazovanih predmetov. Kot glavni rezultat smo primerjali sile upora na goloba in obročke za različne obravnavane primere, pri čemer smo potrdili svoja pričakovanja, da je sila upora na sam obroček bistveno manjša kot je sila upora ki deluje na samega goloba. In this thesis we deal with the field of aerodynamics, which is important from the point of view of the optimum shape of the body under consideration during motion in the air with respect to the minimisation of the drag force during motion. By reducing the drag force, the energy required to move the body is reduced or, for the same amount of energy input, the body moves faster and travels farther. In the thesis itself, I have focused on the aerodynamics of a bird (pigeon) that has a marker and a tracking ring fitted. In the thesis we focused on a few different geometries, namely the marking and tracking rings without considering that they are mounted on the pigeon, then we performed calculations of the pigeon itself without the rings and finally of the pigeon with both rings observed. For the purpose of numerical computations and to determine the computational accuracy, simulations with different grid densities were run to determine the order of error introduced in all simulations by using sparser grids due to the limitation of computational time. The results of the computations are shown as flow fields with velocity distributions around the observed objects, pressure distributions on the surfaces and flow lines around the observed objects. As a main result, we compared the drag forces on the pigeon and the rings for the different cases considered, confirming our expectation that the drag force on the ring itself is significantly smaller than the drag force on the pigeon. sledilni obroček označevalni obroček golob sila upora aerodinamika računalniška dinamika tekočin tracker ring marking ring pigeon drag force aerodynamics computational fluid dynamics true true false [S. Prendl] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2023-08-28 08:11:37 2023-10-09 15:30:58 2024-02-21 03:09:22 0000-00-00 00:00:00 2023 0 Maribor 0 Maribor 1 spletni vir (1 datoteka PDF (XIII, 41 f.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 519.876.5:533.6(043.2) 186183171 VS_Prendl_Saso_2023.pdf VS_Prendl_Saso_2023.pdf 1 37AF6F5A219938E33A5688C8920A4FBA 2f1c56faf61eb7ac41301081b9b18ce62843eac06e49b43ef349b50baac3c6b7 62500e0e-50a5-11ee-a242-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=171966 Fakulteta za strojništvo 0 0 0