20.500.12556/RUL-189690 Razvoj naprave za pridobivanje električne energije iz vrtincev v toku za zastojnim telesom Development of an energy harvester for electricity generation from wake vortices behind a bluff body V diplomskem delu obravnavamo razvoj naprave za pridobivanje električne energije iz vrtincev, ki nastajajo v vodnem toku za zastojnim telesom. Razvoj je potekal v dveh stopnjah. Na laboratorijskem sistemu smo preučili vpliv geometrije telesa in konstrukcijskih nastavitev, ugotovitve pa uporabili pri zasnovi večjega prototipa. Kot telesi v toku sta bila uporabljena valj in profilirano krilo. Napravo sestavljajo telo v toku, elastično vpetje in mehanski prenos, ki nihanje pretvori v vrtenje gredi. Eksperimentalno vrednotenje prototipa je bilo osredotočeno na mehanski del pretvorbe energije. Iz izmerjenega navora in vrtilne frekvence smo določili mehansko moč na gredi. Meritve so bile izvedene pri hitrosti vodnega toka 0,9 m/s. Pri krilu je največja povprečna mehanska moč znašala 5,48 W, največja izmerjena vrednost pa 10,14 W. Pri valju je največja povprečna mehanska moč znašala 1,09 W, največja izmerjena vrednost pa 2,09 W. Prototip je v primerjavi z laboratorijskim sistemom dosegel približno 2,94-krat večjo povprečno mehansko moč in približno štirikrat večji povprečni navor, njegova vrtilna frekvenca pa je bila približno 27 % nižja. Rezultati kažejo, da na delovanje pomembno vplivajo geometrija telesa, elastično vpetje in nastavitev mehanskega prenosa. This thesis presents the development of a device for generating electrical energy from vortices formed in water flow behind a bluff body. Development was carried out in two stages. A laboratory system was used to examine the influence of body geometry and construction settings, and the findings were applied to a larger prototype. A cylinder and a profiled hydrofoil were used as bodies in the flow. The device consists of the flow-exposed body, an elastic suspension and a mechanical transmission that converts oscillatory motion into shaft rotation. Experimental evaluation focused on the mechanical stage of energy conversion. Mechanical power at the shaft was determined from measured torque and rotational frequency. Measurements were performed at a water-flow velocity of 0.9 m/s. With the hydrofoil, the highest average mechanical power was 5.48 W and the highest measured value was 10.14 W. With the cylinder, the corresponding values were 1.09 W and 2.09 W. Compared with the laboratory system, the prototype achieved approximately 2.94 times higher average mechanical power and about four times higher average torque, while its rotational frequency was 27 % lower. The results show that performance is strongly influenced by body geometry, elastic suspension and mechanical-transmission settings. vrtinčno vzbujena nihanja (VIV) hidrokinetična energija nihajni hidrokinetični pretvorniki krila valji mehanska moč vortex-induced vibrations (VIV) hydrokinetic energy VIV energy harvesters hydrofoils cylinders mechanical power true false false [T. Brodarič] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-10-13 08:30:40 2026-10-13 08:30:50 2026-10-19 07:01:30 0000-00-00 00:00:00 2026 0 Ljubljana 0 XXIV, 64 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.9:621.22(043.2) 294296 301372931 51103.pdf 51103.pdf 1 8F5F0BFBAF71B947A518C670261D8E66 bbbc1238f44d15e3599981e39745e54f0936731fdc0eda1cad71b97c9b2e6315 8000ad76-c6cf-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=250420 Fakulteta za strojništvo 0 0 0