CFD ANALYSIS OF AIR FLOW AROUND THE ROTOR OF A 1 kW WORTMANN WINDTURBINE

U diplomskom radu je provedena CFD analiza strujanja zraka oko rotora vjetroturbine snage 1 kW koja je oblikovana Wortmannovim aeroprofilima. Nakon analize strujanja zraka oko rotora, napravljena je usporedba s vjetroturbinom koja je izrađena od Althausovih aeroprofila čija je autorica kolegica Mihaela Erceg. Ograničenja koja su postavljena autoru su snaga rotora vjetroturbine koja mora biti 1 kW i aeroprofili koji moraju biti oznake Wortmann. Uzimajući u obzir ograničenja, kreće se u prelimirarnu fazu osnivanja i razvoja vjetroturbine iz koje se oblikuje geometrija konačnog seta aeroprofila. Sljedeća faza je oblikovanje geometrije u odgovarajućem softveru platforme Ansys. Zatim slijedi generiranje mreže vodeći računa o graničnom sloju. Nakon svega slijedi CFD simulacija u rješavaču Fluent na temelju čijih rezultata se vrši usporedba polja fizikalnih veličina kod dvije različite vjetroturbine i donosi se konačan zaključak po pitanju efikasnosti. Na kraju su navedeni prijedlozi za poboljšanje procesa osnivanja i razvitka vjetroturbine.In this master’s thesis, a CFD analysis of wind flow around 1 kW wind turbine rotor defined by Wortmann airofils was conducted. After wind flow analysis around wind turbine rotor, a comparison was made with the windturbine that was made of Althaus airfoils whose author is a colleague Mihaela Erceg. Limits set up upon author were the power of a windturbine rotor which is 1 kW and airfoils which must be a Wortmann brand. Regarding the limits, the development starts with the preliminary phase of establishing and developing windturbine which is a start point for modelling the final set of airfoils. Next step is modelling geometry in a certain software of the platform Ansys. Next comes mesh generation taking into account boundary layer. After all, next comes CFD simulation in solver Fluent whose results are used to compare field of physical quantities for two different windturbines and a final conclusion is made regarding wind turbine efficiency. Lastly, suggestions for improvement have been made for the process of founding and developing windturbine