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undergraduate thesis
Analiza induciranog otpora pri strujanju oko stražnjeg krila natjecateljskog automobila
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2016. urn:nbn:hr:235:516963
Ždravac, Antonio
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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Ždravac, A. (2016). Analiza induciranog otpora pri strujanju oko 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:235:516963

Ždravac, Antonio. "Analiza induciranog otpora pri strujanju oko stražnjeg krila natjecateljskog automobila." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2016. https://urn.nsk.hr/urn:nbn:hr:235:516963

Ždravac, Antonio. "Analiza induciranog otpora pri strujanju oko stražnjeg krila natjecateljskog automobila." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2016. https://urn.nsk.hr/urn:nbn:hr:235:516963

Ždravac, A. (2016). 'Analiza induciranog otpora pri strujanju oko stražnjeg krila natjecateljskog automobila', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 18 November 2024, https://urn.nsk.hr/urn:nbn:hr:235:516963

Ždravac A. Analiza induciranog otpora pri strujanju oko stražnjeg krila natjecateljskog automobila [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2016 [cited 2024 November 18] Available at: https://urn.nsk.hr/urn:nbn:hr:235:516963

A. Ždravac, "Analiza induciranog otpora pri strujanju oko stražnjeg krila natjecateljskog automobila", Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2016. Available at: https://urn.nsk.hr/urn:nbn:hr:235:516963

Metadata
TitleAnaliza induciranog otpora pri strujanju oko stražnjeg krila natjecateljskog automobila
Title (english)Analysis of induced drag in flow over rear wing of race car
AuthorAntonio Ždravac
MentorSeverino Krizmanić (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2016-09-22, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
Kod natjecateljskih automobila, u cilju ostvarivanja što veće sile na podlogu, pribjegava se posebnom oblikovanju podvozja automobila, te ugradnji prednjeg i stražnjeg krila. Željeno povećanje aerodinamičke sile ostvaruje se izvedbom krila s velikim specifičnim aerodinamičkim opterećenjem i to najčešće kao krila male vitkosti. U ovom radu su istražene strujne pojave pri opstrujavanju zadanog modela stražnjeg krila natjecateljskog automobila s posebnim osvrtom na inducirani otpor. Sama geometrija stražnjeg krila natjecateljskog automobila modelirana je u programskom paketu Solidworks i preuzeta od članova FSB Racing Teama. Dorade geometrije i proračunska domena izrađene su u programskom paketu Salome. Domena je ispunjena konačnim volumenima generiranim u programskom paketu cfMesh. Mrežom dominiraju pravilni heksaedarski volumeni, uz korištenje manjeg broja prijelaznih tetraedarskih ćelija te trokutnih prizmi kako bi se sačuvala geometrijska definicija rubova. Svi proračuni provedeni su s ulaznom neporemećenom brzinom od 30 m/s (108 km/h). Simulacije su napravljene uz pomoć programskog paketa OpenFoam, koristeći program za rješavanje modela stacionarnog strujanja uz k-omegaSST model turbulencije. Izrađeno je ukupno 5 simulacija uz promjenu geometrije stražnjeg krila. U analizi rezultata dan je prikaz raspodjele tlakova i brzina, te smanjenja koeficijenta otpora, odnosno povećanja koeficijenta uzgona.
Abstract (english)
When it is about race cars, it is necessary to achive as more force to the base as it can. It is done by instalation of front and rear spoilers. Wanted enlargement of aerodynamic force is realized by using great loaded wing, most with low slenderness. In this work, stream phenomenon are analyzed with opposing rear wing of the race car. The special review is on the induced resistance. Geometry of the rear wing model has been designed in Solidworks program package and it is took over from students organisation FSB Racing team. Program package Salome is used for futher work on geometry and calculations. Domain grid is filled with finite volume generated in cfMesh program package. Mesh is structured by using hexahedron cells, with small number of transitional tetrahedral cells and triangular prisms used to preserve the surfaces of the geometry model. All calculations were performed with the same freestream velocity of 30 m/s (108 km/h). For all simulations a steady-state flow model with the k-omegaSST turbulence model was used as implemented in the OpenFOAM software library. There are totally 5 simulations with changing the geometry of rear wing. In results, distribution of pressure (increase in the coefficient of lift), speed and reduced coefficient of resistance are shown.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:516963
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
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Created on2019-05-27 10:11:24