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master's thesis
Numerička analiza strujanja zraka oko kotača bicikla
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. urn:nbn:hr:235:276820
Avirović, Matija
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

Cite this document

Avirović, M. (2021). Numerička analiza strujanja zraka oko kotača bicikla (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:276820

Avirović, Matija. "Numerička analiza strujanja zraka oko kotača bicikla." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. https://urn.nsk.hr/urn:nbn:hr:235:276820

Avirović, Matija. "Numerička analiza strujanja zraka oko kotača bicikla." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. https://urn.nsk.hr/urn:nbn:hr:235:276820

Avirović, M. (2021). 'Numerička analiza strujanja zraka oko kotača bicikla', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 25 December 2024, https://urn.nsk.hr/urn:nbn:hr:235:276820

Avirović M. Numerička analiza strujanja zraka oko kotača bicikla [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2021 [cited 2024 December 25] Available at: https://urn.nsk.hr/urn:nbn:hr:235:276820

M. Avirović, "Numerička analiza strujanja zraka oko kotača bicikla", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:235:276820

Metadata
TitleNumerička analiza strujanja zraka oko kotača bicikla
Title (english)Numerical analysis of air flow around bicycle wheel
AuthorMatija Avirović
MentorŽeljko Tuković (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2021-07-16, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Process Energy Engineering
Abstract
U sklopu diplomskog zadatka provedena je numerička analiza strujanja zraka oko kotača bicikla za tri različite izvedbe oblika obruča: - Izvedba s obručem dubine 50 mm i 20 žbica, - Izvedba s obručem dubine 60 mm i 3 krute žbice (zvijezda izvedba), - Izvedba s punim obručem (disk izvedba). Geometrijski modeli kotača izrađeni su u programu SolidWorks®, prostorna domena je diskretizirana pomoću programa Ansys Fluent Meshing®, a numeričke simulacije su provedene pomoću programa Ansys Fluent® koji se temelji na primjeni metode konačnih volumena. Aerodinamičke karakteristike kotača (sila otpora, sila uzgona i bočna sila) su promatrane u ovisnosti o intenzitetu brzine i napadnom kutu strujanja zraka. Numerička analiza je provedena za intenzitete brzine od 11,11 m/s (40 km/h), 12,50 m/s (45 km/h) i 13,88 m/s (50 km/h) te napadne kutove od 0°, 5° i 10° jer se taj raspon vrijednosti brzina i napadnih kutova najčešće javlja tijekom biciklističkih utrka. Nakon provedene numeričke analize dan je komparativni pregled aerodinamičkih karakteristika kotača u ovisnosti o intenzitetu brzine, napadnom kutu i obliku obruča kotača.
Abstract (english)
As a part of this master thesis numerical analysis of air flow around the bicycle wheels was conducted for three different types of bicycle wheels: - Wheel with rim cross section depth of 50 mm and 20 spokes, - Wheel with rim cross section depth of 60 mm and 3 stiff spokes (trispoke wheel), - Wheel with full rim cross section (disc wheel). Geometrical models of bicycle wheels were made in 3D modeling program SolidWorks®, discretization of spatial domain was made in program Ansys Fluent Meshing®, and numerical analysis was conducted in program Ansys Fluent® which is based on finite volume method. Aerodynamic characteristics (drag force, lift force and side force) of bicycle wheels were studied with regards to changes of velocity intensity and changes of yaw angle. Therefore numerical analysis was conducted for inlet velocities of 11,11 m/s (40 km/h), 12,5 m/s (45 km/h), 13,88 m/s (50 km/h), and yaw angles of 0°, 5° and 10° because these values resemble range that commonly occurs during bicycle races. After the conclusion of numerical analysis comparative overview of aerodynamic characteristics with regards to inlet velocities, yaw angles and types of the bicycle wheels was given.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:276820
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2021-07-09 17:49:03