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master's thesis
Numeričko modeliranje procesa ubrizgavanja i isparavanja goriva u uvjetima povišene temperature goriva i niskog tlaka komore izgaranja
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. urn:nbn:hr:235:058232
Benković, Dajana
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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Benković, D. (2018). Numeričko modeliranje procesa ubrizgavanja i isparavanja goriva u uvjetima povišene temperature goriva i niskog tlaka komore izgaranja (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:058232

Benković, Dajana. "Numeričko modeliranje procesa ubrizgavanja i isparavanja goriva u uvjetima povišene temperature goriva i niskog tlaka komore izgaranja." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. https://urn.nsk.hr/urn:nbn:hr:235:058232

Benković, Dajana. "Numeričko modeliranje procesa ubrizgavanja i isparavanja goriva u uvjetima povišene temperature goriva i niskog tlaka komore izgaranja." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. https://urn.nsk.hr/urn:nbn:hr:235:058232

Benković, D. (2018). 'Numeričko modeliranje procesa ubrizgavanja i isparavanja goriva u uvjetima povišene temperature goriva i niskog tlaka komore izgaranja', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 29 November 2024, https://urn.nsk.hr/urn:nbn:hr:235:058232

Benković D. Numeričko modeliranje procesa ubrizgavanja i isparavanja goriva u uvjetima povišene temperature goriva i niskog tlaka komore izgaranja [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2018 [cited 2024 November 29] Available at: https://urn.nsk.hr/urn:nbn:hr:235:058232

D. Benković, "Numeričko modeliranje procesa ubrizgavanja i isparavanja goriva u uvjetima povišene temperature goriva i niskog tlaka komore izgaranja", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2018. Available at: https://urn.nsk.hr/urn:nbn:hr:235:058232

Metadata
TitleNumeričko modeliranje procesa ubrizgavanja i isparavanja goriva u uvjetima povišene temperature goriva i niskog tlaka komore izgaranja
Title (english)Numerical modelling of the gasoline fuel injection process under the flash boiling conditions
AuthorDajana Benković
MentorMilan Vujanović (mentor)
Committee memberMilan Vrdoljak (predsjednik povjerenstva)
Committee memberJosip Stepanić (član povjerenstva)
Committee memberDarko Ivančević (član povjerenstva)
Committee memberZoran Lulić (član povjerenstva)
Committee memberMilan Vujanović (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2018-12-06, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Aviation, Rocket and Space Technology
Abstract
Sigurnost i pouzdanost glavni su prioriteti u zrakoplovnoj industriji, zbog čega se teži ka usavršavanju svakog dijela te svakog procesa. Motori s unutarnjim sagorijevanjem ne predstavljaju iznimku: evolucija motora s unutarnjim sagorijevanjem za sobom povlači i razvoj te razumijevanje svakog segmenta procesa izgaranja motora. Sustav kojim se gorivo dovodi u komoru izgaranja predstavlja jedan od mnogih čimbenika koji izravno utječu na proces izgaranja. Nagli razvoj tehnologije ubrizgavanja goriva nudi mogućnost primjene brojnih prednosti takvog sustava dobave goriva. Iz tog razloga, korištenjem modernog inženjerskog alata u svrhu istraživanja raznovrsnih inženjerskih sustava - računalne dinamike fluida (RDF), ovaj rad obuhvaća numeričku analizu sustava direktnog ubrizgavanja goriva u flash boiling operativnim uvjetima motora. Flash boiling je pojava brzog smanjenja tlaka predgrijanje kapljevine na vrijednost tlaka manju od tlaka zasićenja kapljevine. Numerička analiza realne geometrije benzinske brizgaljke, provedena je unutar komercijalnog programskog paketa za računalnu dinamiku fluida AVL FIRE TM. Kako bi se reproduciralo stvarno pomicanje dijelova brizgaljke tijekom procesa ubrizgavanja goriva, izrađena je pomična računalna domena. Definirane su numeričke postavke rješavača, uključujući i rubne te početne uvjete za oba promatrana slučaja: standarni te flash boiling slučaj. Nadalje, provedna je analiza dobivenih rezultata, nakog čega su dane usporedbe dvaju razmatranih režima procesa ubrzgavanja goriva. Rezultati flash boiling simulacije na kraju su uspoređeni s eksperimentalnim podacima te numeričkim rezultatima, utvrđenim iz proračuna provedenih u drugom računalnom kodu.
Abstract (english)
Safety and reliability are a priority in aerospace industry today and in the relentless pursuit for improvements every part and every process is scrutinized. Internal combustion engines are not an exception: evolution of the internal combustion engines includes understanding and development of every segment of the engine combustion process. The fuel delivery system represents one of the many factors which was found to have a direct impact on the combustion process. Due to the large-scale development of the fuel injection technology, many advantages of such fuel delivery system are recognized and applicable. For that reason, by using a modern engineering tool for investigation of various engineering systems---Computational Fluid Dynamics (CFD), a numerical analysis of the direct fuel injection system under the flash boiling operating conditions was performed in this thesis. Flash boiling is a phenomenon of preheated liquid depressurization to the value below the liquid saturation pressure. Numerical investigation of a gasoline injector was carried out in commercial computational fluid dynamics software AVL FIRE TM. In order to reproduce the actual movement of injector parts during the injection process, a moving computational domain was created. Numerical setup, that includes definitions of boundary and initial conditions, as well as the solver setup of both standard and flash boiling operating conditions, was presented. Postprocessing of obtained results was made afterwards, and the flash boiling case was compared with the standard one. Finally, the results of the flash boiling simulation were compared with the available experimental data and numerical results from the literature.
Keywords
Keywords (english)
Languageenglish
URN:NBNurn:nbn:hr:235:058232
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
Terms of useLicence In copyright icon
Created on2019-05-28 09:47:59