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master's thesis
Numerički proračun aerodinamičkih karakteristika aeroprofila u krozzvučnoj i nadzvučnoj struji zraka
Zagreb: University of Zagreb, Faculty of Transport and Traffic Sciences, 2022. urn:nbn:hr:119:219689
Globlek, Matej
University of Zagreb
Faculty of Transport and Traffic Sciences
Division of Aeronautics
Department of Aeronautics

Institutional repository: Faculty of Transport and Traffic Sciences

Cite this document

Globlek, M. (2022). Numerički proračun aerodinamičkih karakteristika aeroprofila u krozzvučnoj i nadzvučnoj struji zraka (Master's thesis). Zagreb: University of Zagreb, Faculty of Transport and Traffic Sciences. Retrieved from https://urn.nsk.hr/urn:nbn:hr:119:219689

Globlek, Matej. "Numerički proračun aerodinamičkih karakteristika aeroprofila u krozzvučnoj i nadzvučnoj struji zraka." Master's thesis, University of Zagreb, Faculty of Transport and Traffic Sciences, 2022. https://urn.nsk.hr/urn:nbn:hr:119:219689

Globlek, Matej. "Numerički proračun aerodinamičkih karakteristika aeroprofila u krozzvučnoj i nadzvučnoj struji zraka." Master's thesis, University of Zagreb, Faculty of Transport and Traffic Sciences, 2022. https://urn.nsk.hr/urn:nbn:hr:119:219689

Globlek, M. (2022). 'Numerički proračun aerodinamičkih karakteristika aeroprofila u krozzvučnoj i nadzvučnoj struji zraka', Master's thesis, University of Zagreb, Faculty of Transport and Traffic Sciences, accessed 26 November 2024, https://urn.nsk.hr/urn:nbn:hr:119:219689

Globlek M. Numerički proračun aerodinamičkih karakteristika aeroprofila u krozzvučnoj i nadzvučnoj struji zraka [Master's thesis]. Zagreb: University of Zagreb, Faculty of Transport and Traffic Sciences; 2022 [cited 2024 November 26] Available at: https://urn.nsk.hr/urn:nbn:hr:119:219689

M. Globlek, "Numerički proračun aerodinamičkih karakteristika aeroprofila u krozzvučnoj i nadzvučnoj struji zraka", Master's thesis, University of Zagreb, Faculty of Transport and Traffic Sciences, Zagreb, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:119:219689

Metadata
TitleNumerički proračun aerodinamičkih karakteristika aeroprofila u krozzvučnoj i nadzvučnoj struji zraka
Title (english)Numerical Aerodynamic Characteristics Estimation of Airfoil in Transonic and Supersonic Air Flow
AuthorMatej Globlek
MentorKarolina Krajček Nikolić (mentor)
Committee memberDoris Novak (predsjednik povjerenstva)
Committee memberDavor Franjković (član povjerenstva)
Committee memberAnita Domitrović (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Transport and Traffic Sciences
(Division of Aeronautics)
(Department of Aeronautics)
Zagreb
Defense date and country2022-09-22, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Traffic and Transport Technology
Air Traffic
Abstract
Cilj ovog diplomskog rada je bio provesti numerički proračun aerodinamičkih karakteristika aeroprofila u krozzvučnoj i nadzvučnoj struji zraka. Proračun je napravljen pomoću računalne dinamike fluida (CFD-Computational Fluid Dynamics) unutar ANSYS Fluent Student Software-a koji koristi matematičke odnose i algoritme, dobivene rješavanjem kompletnih Navier-Stokes-ovih jednadžbi, za analizu i dobivanje rezultata, kao što su koeficijenti uzgona i otpora, te sile uzgona i otpora koje određuju mogućnosti aeroprofila. U ovom radu je provedena CFD analiza na nadzvučnom „dijamantnom“ dvostruko simetričnom klinastom aeroprofilu oko kojeg je modelirano krozzvučno i nadzvučno strujanje uz promjenu napadnog kuta. Promatrana strujanja su stlačiva i turbulentna, te se koristi DB rješavač (density-based solver), koji daje dobre rezultate za stlačiva strujanja krozzvučnih i nadzvučnih brzina. Koeficijenti uzgona i otpora za krozzvučno strujanje nisu konvergirali prema konačnoj stalnoj vrijednosti, te se pri visoko podzvučnoj (krozzvučnoj) brzini ne mogu uzeti s pouzdanošću u njihovu točnost, ali pri krozzvučnoj brzini niske nadzvučne vrijednosti, koeficijenti su, iako bez potpune konvergencije, poprimili konačnu vrijednost te se mogu uzeti s pouzdanošću u njihovu točnost. Koeficijenti uzgona i otpora za nadzvučno strujanje, dobiveni numeričkim pristupom, uspoređeni su s teorijskim rezultatima, za koje je proveden egzaktni proračun u ovom radu, te je postignuto gotovo savršeno podudaranje.
Abstract (english)
Objective of this master thesis was to conduct numerical aerodynamic characteristics estimation of airfoil in transonic and supersonic air flow. Estimation was made using Computational Fluid Dynamics (CFD) within ANSYS Fluent Student Software which incorporates mathematical relations and algorithms, obtained by solving complete Navier-stokes equations, to analyze and obtain results, such as lift and drag coefficients, and lift and drag forces which determine airfoil capabilities. In this paper, CFD analysis was conducted on supersonic diamond double symmetrical wedge shaped airfoil, over which a transonic and supersonic flow was modelled, with change of angle of attack. Observed flows are compressible and turbulent and density-based solver is used, which gives good results for transonic and supersonic compressible flows. Lift and drag coefficients for transonic flow didn´t converge towards finite constant value, and at high subconic (transonic) speed they can´t be taken with confidence in their accuracy, but at transonic speed of low supersonic value, coefficients have, although without complete convergence, obtained finite value and can be taken with confidence in their accuracy. Lift and drag coefficients for supersonic flow, obtained with numerical approach, are compared with theoretical results, for which exact estimation was made, and almost perfect agreement was achieved.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:119:219689
Study programmeTitle: Aeronautics
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka aeronautike (magistar/magistra inženjer/inženjerka aeronautike)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2022-12-09 15:27:00