diplomsko delo Visokošolskega strokovnega študijskega programa I. stopnje Strojništvo
Urban Golob (Author), Jože Kutin (Mentor), Gregor Bobovnik (Co-mentor)

Abstract

Hitrost zraka in aerodinamične lastnosti zastojnih teles v vetrovniku imajo največji vpliv na aerodinamične sile, ki delujejo na telo v toku tekočine. Z namenom določanja aerodinamičnih sil in koeficienta upora teles v vetrovniku smo v okviru diplomskega dela skonstruirali, postavili in validirali merilni sistem za merjenje sil. Izvedli smo meritve sile upora in koeficienta upora za različne oblike (krogla, valj in kocka) in velikosti preskušancev. Dobljeni rezultati kažejo, da je koeficient upora za vse preskušance primerljiv pri hitrostih zraka med 10 m/s in 30 m/s, pri hitrosti 5 m/s pa so opažena določena odstopanja. Eksperimentalno določeni koeficienti upora preskušancev se tudi dobro skladajo z vrednostmi koeficientov pridobljenih iz literature, kar potrjuje ustreznost uporabljenega merilnega sistema.

Keywords

diplomske naloge;vetrovnik;sila upora;koeficient upora;validacija merilnega sistema;nadzorni program;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FS - Faculty of Mechanical Engineering
Publisher: [U. Golob]
UDC: 519.8:533.6.07(043.2)
COBISS: 29250051 Link will open in a new window
Views: 674
Downloads: 84
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Other data

Secondary language: English
Secondary title: The measuring system for determination drag coefficient of object in wind tunnel
Secondary abstract: The air velocity and aerodynamic properties of bluff body in the wind tunnel have the greatest influence on the aerodynamic forces acting on it. With intention to determine the aerodynamic forces and the drag coefficient of different bluff bodies in a wind tunnel, we constructed, set up and validated a new measuring system for measuring. The measurements of drag force and drag coefficient were carried out for different shapes (sphere, cylinder and cube) and sizes of bluff bodies. The obtained results show that the values of drag coefficients are comparable for air velocities between 10 and 30 m/s, while smaller deviations were noticed at 5 m/s. The experimentally determined values of drag coefficients agree well with the values from literature, which confirms the adequacy of the measuring system.
Secondary keywords: wind tunnel;drag force;drag coefficient;validation of the measuring system;control program;
Type (COBISS): Bachelor thesis/paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za strojništvo
Pages: XXII, 58 str.
ID: 12003898
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