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undergraduate thesis
Utjecaj promjene geometrije na aerodinamičku silu stražnjeg krila natjecateljskog automobila
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. urn:nbn:hr:235:140277
Melnjak, Petar
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

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

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Melnjak, P. (2020). Utjecaj promjene geometrije na aerodinamičku silu stražnjeg krila natjecateljskog automobila (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:140277

Melnjak, Petar. "Utjecaj promjene geometrije na aerodinamičku silu stražnjeg krila natjecateljskog automobila." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. https://urn.nsk.hr/urn:nbn:hr:235:140277

Melnjak, Petar. "Utjecaj promjene geometrije na aerodinamičku silu stražnjeg krila natjecateljskog automobila." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. https://urn.nsk.hr/urn:nbn:hr:235:140277

Melnjak, P. (2020). 'Utjecaj promjene geometrije na aerodinamičku silu stražnjeg krila natjecateljskog automobila', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 27 February 2025, https://urn.nsk.hr/urn:nbn:hr:235:140277

Melnjak P. Utjecaj promjene geometrije na aerodinamičku silu stražnjeg krila natjecateljskog automobila [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2020 [cited 2025 February 27] Available at: https://urn.nsk.hr/urn:nbn:hr:235:140277

P. Melnjak, "Utjecaj promjene geometrije na aerodinamičku silu stražnjeg krila natjecateljskog automobila", Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:235:140277

Metadata
TitleUtjecaj promjene geometrije na aerodinamičku silu stražnjeg krila natjecateljskog automobila
Title (english)The influence of geometry variations on aerodynamic force race car rear wing
AuthorPetar Melnjak
MentorZdravko Virag (mentor)
MentorIvan Korade (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2020-02-27, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Process Energy Engineering
Abstract
Glavni zahtjev natjecateljskog automobila je minimalno vrijeme potrebno za savladavanje određene trkaće staze. U cilju ostvarivanja glavnog zahtjeva, inženjeri veliku pozornost pridaju oblikovanju aerodinamičkih komponenti jer i najmanja promjena aerodinamičkih komponenti dat će znatne promjene u performansama automobila. Zadatak ovoga rada bio je istražiti strujanje oko modela stražnjeg krila natjecateljskog automobila s posebnom pozornošću na aerodinamičke sile koje djeluju na stražnje krilo prilikom vožnje natjecateljskog automobila. U radu su također pokazane beneficije pri uporabi aktivnog stražnjeg krila, koje se ostvaruju promjenom napadnog kuta jedne od lopatica za vrijeme vožnje. U radu su prikazane dvije varijante stražnjeg krila. Proračuni su izvršeni u programskom paketu openFOAM. Korišteni je model nestlačivog stacionarnog turbulentnog strujanja, a turbulencija je modelirana pomoću k − ωSST modela turbulencije. U svim proračunima brzina neporemećenog strujanja bila je 20 m/s. U analizi rezultata dan je prikaz: polja brzina, raspodjele bezdimenzijskog koeficijenta tlaka po stražnjem krilu, intenziteta i veličine vrtložnog traga, te usporedba aerodinamičikih sila za različite varijante krila.
Abstract (english)
The main demand of a race car is to set the fastest lap around a particular race track. In order to achieve the main demand, engineers pay great attention to the design of aerodynamic components, because even the smallest changes to the aerodynamic components will give significant changes in the performance of the car. The task of this thesis was to investigate the flow around the rear wing of a race car with particular attention to the aerodynamic forces that act on the rear wing when driving a race car. The thesis also demonstrates the benefits of using the active rear wing, which is achieved by changing the angle of attack of one of the blades while driving. Two variants of the rear wing are presented in the thesis. The calculations were made in the openFOAM software package. A incompressible steady-state turbulent flow model was used, and turbulence was modeled using a k-ωSST turbulence model. In all calculations, the velocity of undisturbed flow was 20 m/s. The analysis of the results shows: velocity fields, distribution of pressure coefficient on the rear wing, vortex trace intensity and magnitude, and comparison of aerodynamic forces for different wing variants.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:140277
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2020-02-24 10:23:40