prikaz prve stranice dokumenta Utjecaj položaj ruku na aerodinamičke karakteristike skijaša letača
  Download
PDF 5.76 MB
undergraduate thesis
Utjecaj položaj ruku na aerodinamičke karakteristike skijaša letača
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2016. urn:nbn:hr:235:883893
Golubić, Dino
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

Golubić, D. (2016). Utjecaj položaj ruku na aerodinamičke karakteristike skijaša letača (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:883893

Golubić, Dino. "Utjecaj položaj ruku na aerodinamičke karakteristike skijaša letača." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2016. https://urn.nsk.hr/urn:nbn:hr:235:883893

Golubić, Dino. "Utjecaj položaj ruku na aerodinamičke karakteristike skijaša letača." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2016. https://urn.nsk.hr/urn:nbn:hr:235:883893

Golubić, D. (2016). 'Utjecaj položaj ruku na aerodinamičke karakteristike skijaša letača', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 29 December 2024, https://urn.nsk.hr/urn:nbn:hr:235:883893

Golubić D. Utjecaj položaj ruku na aerodinamičke karakteristike skijaša letača [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2016 [cited 2024 December 29] Available at: https://urn.nsk.hr/urn:nbn:hr:235:883893

D. Golubić, "Utjecaj položaj ruku na aerodinamičke karakteristike skijaša letača", Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2016. Available at: https://urn.nsk.hr/urn:nbn:hr:235:883893

Metadata
TitleUtjecaj položaj ruku na aerodinamičke karakteristike skijaša letača
Title (english)Aerodynamic characteristics of ski jumper influenced by position of his arms
AuthorDino Golubić
MentorHrvoje Kozmar (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2016-03-02, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
U ovom završnom radu istražen je utjecaj položaja ruku skijaša letača na duljinu njegova skoka. Duljina skoka velikim je dijelom uvjetovana odnosom sile uzgona i otpora skijaša pa su te dvije aerodinamičke sile te njihov omjer promatrani tijekom numeričke analize. Tijelo skijaša letača modelirano je u CAD programskom paketu SolidWorks na pojednostavljeni način kako je i prethodno bilo modelirano u sličnim radovima. Modelirana su tri modela skijaša letača s različitim položajem ruku u odnosu na tijelo: a) ruke pod 0° (uz tijelo), b) ruke pod 45°, c) ruke pod 90°. Proračunska domena s jednom ravninom simetrije napravljena je u programskom paketu Salome. Domena je strukturirano ispunjena mrežom heksaedarskih konačnih volumena uz veća profinjenja u blizini tijela skijaša uz korištenje programskog paketa cfMesh. Numerički proračun proveden je u računalnom programu OpenFOAM uz stacionarne uvjete strujanja. Uz aerodinamičke sile otpora i uzgona u radu su prikazana i polja tlaka i brzine oko tijela skijaša te je provedena diskusija rezultata.
Abstract (english)
In this bachelor thesis, the aerodynamic forces experienced by a generic ski jumper are studied. The focus is on the position of ski jumper’s arms with respect to his body. As the length of the jump is largely determined by the lift to drag force ratio of the ski jumper, these two aerodynamic forces are analyzed using Computational Fluid Dynamics (CFD) simulations. Ski jumper’s body is modeled in the SolidWorks CAD software package in a simplified way similar to previous studies. Three models of the ski jumper with different placement of arms with respect to his body are modeled, i.e. a) arms at 0° (close to body), b) arms at 45° , c) arms at 90° . Computational domain with one symmetry plane is created in the Salome software package. The domain is structurally filled with the grid of hexahedron cells along with refinements close to the ski jumper‘s body using the cfMesh software package. The CFD simulations are carried out using the OpenFOAM software package, SST k− ω turbulence model and stationary flow conditions. The aerodynamic drag and lift forces, as well as pressure and velocity fields around the ski jumper are reported and discussed.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:883893
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 on2019-05-27 10:09:17