prikaz prve stranice dokumenta Analiza strujanja i prijelaza topline u odjeljku motora lakog zrakoplova korištenjem numeričke mehanike fluida
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master's thesis
Analiza strujanja i prijelaza topline u odjeljku motora lakog zrakoplova korištenjem numeričke mehanike fluida
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. urn:nbn:hr:235:767178
Zrnić, 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

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Zrnić, D. (2018). Analiza strujanja i prijelaza topline u odjeljku motora lakog zrakoplova korištenjem numeričke mehanike fluida (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:767178

Zrnić, Dino. "Analiza strujanja i prijelaza topline u odjeljku motora lakog zrakoplova korištenjem numeričke mehanike fluida." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. https://urn.nsk.hr/urn:nbn:hr:235:767178

Zrnić, Dino. "Analiza strujanja i prijelaza topline u odjeljku motora lakog zrakoplova korištenjem numeričke mehanike fluida." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. https://urn.nsk.hr/urn:nbn:hr:235:767178

Zrnić, D. (2018). 'Analiza strujanja i prijelaza topline u odjeljku motora lakog zrakoplova korištenjem numeričke mehanike fluida', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 07 November 2024, https://urn.nsk.hr/urn:nbn:hr:235:767178

Zrnić D. Analiza strujanja i prijelaza topline u odjeljku motora lakog zrakoplova korištenjem numeričke mehanike fluida [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2018 [cited 2024 November 07] Available at: https://urn.nsk.hr/urn:nbn:hr:235:767178

D. Zrnić, "Analiza strujanja i prijelaza topline u odjeljku motora lakog zrakoplova korištenjem numeričke mehanike fluida", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2018. Available at: https://urn.nsk.hr/urn:nbn:hr:235:767178

Metadata
TitleAnaliza strujanja i prijelaza topline u odjeljku motora lakog zrakoplova korištenjem numeričke mehanike fluida
Title (english)Thermal management analysis in the engine compartment of a Light Aircraft using Computational Fluid Dynamics
AuthorDino Zrnić
MentorHrvoje Jasak (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2018-01-25, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Aviation, Rocket and Space Technology
Abstract
U ovom radu predstavljen je prikaz hladenja i analiza strujanja i prijelaza topline u odjeljku motora lakog zrakoplova korištenjem numeričke mehanike fluida. Kako propeler ima veliki utjecaj na ulaznu struju zraka u odjeljak motora gdje se odvija hladenje, napravljena je zasebna numerička simulacija rada propelera. Ovom simulacijom proučavani su stlačivi efekti strujanja s ciljem dobivanja točnih sila i momenata za veće područje rada motora. Ti podatci su potrebni kako bi se pomoću teorije diska postavili uvjeti za sljedeću numeričku simulaciju koja obuhvaća prijelaz topline s motora na okolni zrak. U ovoj numeričkoj simulaciji disk je postavljen na mjesto propelera, tj. ispred difuzora, te se računa i prikazuje karakteristika strujanja fluida koji prvo ulazi u difuzor, a potom u odjeljak motora hladenog zrakom. Takoder je izračunata toplina koja se prenosi samo konvekcijom na orebrenim površinama. Nadogradena su tri nova modela izmjenjivača topline unutar algoritma za proračun stlačivog strujanja. Ti modeli su testirani i validirani na jednostavnom primjeru cijevi kvadratnog presjeka. Na kraju su prikazani rezultati numeričke simulacije povezanih dijelova propelera i odjeljka motora čiji rezultati su dobiveni zasebnim numeričkim simulacijama.
Abstract (english)
In this thesis the cooling system of an engine in a light aircraft influenced by a propeller is simulated. Firstly, investigation is made for aircraft propeller separately, in order to examine air compressibility effects of the flow around the propeller and to determine the performance of the propeller. The second set of simulations deals with heat transfer in the engine compartment of the Pipistrel Panthera aircraft. Computational domains for the propeller and the engine cooling system are made separately for each case. In order to calculate heat transfer in the engine compartment three new heat exchanger models have been implemented and upgraded with porous media effects inside the compressible flow solver: Total Volumetric Heat model, Single stream model and the Nusselt model. Implemented models are validated on a simple test case and comparison of the results is presented. After successful validation heat transfer simulations are performed for engine cooling. Finally, a steady compressible CFD simulation of the flow with heat transfer is performed for the engine compartment case using the actuator disk model and the integral heat exchanger model. Actuator disk theory which uses calculated force and moment data from the aircraft propeller case has been implemented in order to study influence of propeller wakes and fluid flow on the cooling system of engine compartment.
Keywords
Keywords (english)
Languageenglish
URN:NBNurn:nbn:hr:235:767178
Study programmeTitle: Aeronautical Studies
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka zrakoplovnog inženjerstva (magistar/magistra inženjer/inženjerka zrakoplovnog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Embargo expiration date: 2021-01-19
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Created on2019-05-28 10:22:01