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doctoral thesis
New physically based sub-models for the cycle-simulation of spark-ignition engine
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2014. urn:nbn:hr:235:552575
Sjerić, Momir
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

Sjerić, M. (2014). New physically based sub-models for the cycle-simulation of spark-ignition engine (Doctoral thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:552575

Sjerić, Momir. "New physically based sub-models for the cycle-simulation of spark-ignition engine." Doctoral thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2014. https://urn.nsk.hr/urn:nbn:hr:235:552575

Sjerić, Momir. "New physically based sub-models for the cycle-simulation of spark-ignition engine." Doctoral thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2014. https://urn.nsk.hr/urn:nbn:hr:235:552575

Sjerić, M. (2014). 'New physically based sub-models for the cycle-simulation of spark-ignition engine', Doctoral thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 18 December 2024, https://urn.nsk.hr/urn:nbn:hr:235:552575

Sjerić M. New physically based sub-models for the cycle-simulation of spark-ignition engine [Doctoral thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2014 [cited 2024 December 18] Available at: https://urn.nsk.hr/urn:nbn:hr:235:552575

M. Sjerić, "New physically based sub-models for the cycle-simulation of spark-ignition engine", Doctoral thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2014. Available at: https://urn.nsk.hr/urn:nbn:hr:235:552575

Metadata
TitleNew physically based sub-models for the cycle-simulation of spark-ignition engine
Title (croatian)Novi fizikalni pod-modeli simulacije radnog ciklusa Ottovog motora
AuthorMomir Sjerić
MentorDarko Kozarac (mentor)
Committee memberZoran Lulić (predsjednik povjerenstva)
Committee memberDarko Kozarac (član povjerenstva)
Committee memberNeven Duić (član povjerenstva)
Committee memberDaniel Rolph Schneider (član povjerenstva)
Committee memberReinhard Tatschl https://orcid.org/0000-0001-5198-4933 (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2014-11-27, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
General Mechanical Engineering (Construction)
Universal decimal classification
(UDC)		621 - Mechanical engineering. Nuclear technology. Machinery
Abstract
The research and study presented in this thesis represent the development and validation of new turbulence, ignition and combustion sub-model that are integrated into the cycle-simulation of SI (spark-ignition) engines. The turbulence modeling was performed by the application of new k-ε sub-model while the new quasi-dimensional sub-models were developed to describe the ignition and combustion phenomena. The cycle-simulation results obtained with the application of developed sub-models were compared with the available 3-D CFD results over different operating conditions of several SI engines and with the experimental data of single cylinder SI engine. For each engine the single set of constants was applied and the cycle-simulation results showed a very good agreement with the 3-D CFD and experimental data.The research presented in this thesis resulted in the following scientific contributions:The development of new turbulence sub-model that is able to predict the progress of in-cylinder turbulence close to the 3-D CFD results.The development of new quasi-dimensional ignition model (QDIM) that is able to capture the effects of different in-cylinder conditions and spark plug designs on the early flame kernel growth as well as the multiple breakdowns and misfire conditions.Possibility to analyze the effects of different engine geometries and parameters on output performances with the presence of CCV (cycle-to-cycle variations) and within the reasonable computational time.
Abstract (croatian)
Istraživanje opisano u doktorskom radu predstavlja razvoj i validaciju novih podmodela za modeliranje turbulencije, stvaranja jezgre plamena i izgaranja koji su ugrađeni u simulacijski model radnoga ciklusa Ottova motora. Modeliranje turbulencije provedeno je primjenom novoga k-ε podmodela, a novi kvazidimenzijski podmodeli razvijeni su za proračun stvaranja jezgre plamena i izgaranja. Rezultati simulacija radnoga ciklusa Ottova motora uspoređeni su s dostupnim rezultatima 3-D CFD proračuna za različite radne uvjete nekoliko Ottovih motora, kao i s eksperimentalnim podatcima jednocilindarskoga motora. Jedinstveni skup konstanti primijenjen je za svaki motor te se simulacijski rezultati radnoga ciklusa Ottova motora vrlo dobro poklapaju s rezultatima 3-D CFD proračuna i eksperimentalnim podatcima. Istraživanje predstavljeno u ovom doktorskom radu rezultiralo je sljedećim znanstvenim doprinosima: 1) Razvoj novoga podmodela za proračun turbulencije u cilindru Ottova motora kojim se mogu postići rezultati bliski rezultatima 3-D CFD proračuna, 2) Razvoj novoga kvazidimenzijskoga podmodela za proračun stvaranja jezgre plamena kojim se mogu obuhvatiti utjecaji različitih uvjeta u cilindru motora i različite geometrije elektroda svjećice na rast jezgre plamena kao i efekti višestrukih proboja električne iskre i izostanka paljenja te 3) Mogućnost analize utjecaja različitih geometrija motora i njihovih radnih parametara na performanse Ottova motora uz prisutnost cikličkih varijacija i unutar prihvatljivoga proračunskoga vremena.
Keywords
Keywords (english)
Languageenglish
URN:NBNurn:nbn:hr:235:552575
Study programmeTitle: Mechanical Engineering and Naval Architecture
Study programme type: university
Study level: postgraduate
Academic / professional title: doktor/doktorica znanosti, područje tehničkih znanosti (doktor/doktorica znanosti, područje tehničkih znanosti)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2020-04-27 21:31:45