# Izračun sile otpora i uzgona aero - profila

Tatomir, Niko (2015) Izračun sile otpora i uzgona aero - profila. = Aerofoil lift and drag calculation. Undergraduate thesis , Sveučilište u Zagrebu, Fakultet strojarstva i brodogradnje, UNSPECIFIED. Mentor: Šavar, Mario.

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Tatomir_2015_zavrsni_preddiplomski.pdf Jezik dokumenta:Croatian

## Abstract (Croatian)

U ovkviru ovog završnog rada je izvršena numerička simulacija turbulentnog strujanja (Re=2e5) oko NLF(1) – 0115 aeroprofila pomoću k-kl-ω modela turbulencije pri napadnim kutovima 0°, 5° i 10°. Pri tim napadnim kutovima su izračunati koeficijenti otpora i uzgona koji su uspoređeni sa rezultatima dobivenim XFOIL kodom. Valjanost k-kl-ω modela turbulencije je ispitana na sljedeći način: 1. Koeficijent otpora cilindra pri Re=1e5 se izračunao numeričkom simulacijom pomoću k-kl-ω modela turbulencije. 2. Koeficijent otpora dobiven k-kl-ω modelom se usporedio sa koeficijentima otpora dobivenim eksperimentalnim mjerenjima i k-ω SST modelom turbulencije.

## Abstract

The aim of this bachelor thesis was to model turbulent flow (Re=2e5) around the NLF(1) – 0115 airfoil with the help of the k-kl-ω turbulence model. Numerical simulations were done at three angles of attack: 0°, 5° and 10°. The coefficient of drag and lift was calculted at the mentioned angles of attack and compared to the results calculated using the XFOIL code. The accuracy of the k-kl-ω turbulence model was analysed in the following way: 1. The drag coefficient of a cylinder at Re=1e5 was calculated with the help of the k-kl-ω turbulence model. 2. The calculated drag coefficient was then compared to those obtained experimentally and by numerical simulations using the k-ω SST turbulence model.

Item Type: Thesis (Undergraduate thesis) aerodinamika, aeroprofil, turbulencija, URANS, k-kl-ω model turbulencije; k-ω SST model turbulencije; eksperimentalna mjerenja; metoda konačnih volumena; PISO/SIMPLE algoritam; koeficijent uzgona; koeficijent otpora aerodynamics; airfoil; turbulence; URANS; k-kl-ω turbulence model; k-ω SST turbulence model; experimental results; finite volume method; PISO/SIMPLE algorithm; coefficient of drag; coefficient of lift TECHNICAL SCIENCE > Mechanical Engineering > process energy engineering 500 Department of Energy, Power Engineering and Environment > 520 Chair of Fluid Mechanics 23 Jun 2015 11:33 16 Oct 2015 12:42 http://repozitorij.fsb.hr/id/eprint/4342