prikaz prve stranice dokumenta Numerical modelling of autoignition chemistry kinetics in computational fluid dynamics
  Download
PDF 7.62 MB
doctoral thesis
Numerical modelling of autoignition chemistry kinetics in computational fluid dynamics
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2011. urn:nbn:hr:235:900863
Ban, Marko
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

Ban, M. (2011). Numerical modelling of autoignition chemistry kinetics in computational fluid dynamics (Doctoral thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:900863

Ban, Marko. "Numerical modelling of autoignition chemistry kinetics in computational fluid dynamics." Doctoral thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2011. https://urn.nsk.hr/urn:nbn:hr:235:900863

Ban, Marko. "Numerical modelling of autoignition chemistry kinetics in computational fluid dynamics." Doctoral thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2011. https://urn.nsk.hr/urn:nbn:hr:235:900863

Ban, M. (2011). 'Numerical modelling of autoignition chemistry kinetics in computational fluid dynamics', Doctoral thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 26 December 2024, https://urn.nsk.hr/urn:nbn:hr:235:900863

Ban M. Numerical modelling of autoignition chemistry kinetics in computational fluid dynamics [Doctoral thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2011 [cited 2024 December 26] Available at: https://urn.nsk.hr/urn:nbn:hr:235:900863

M. Ban, "Numerical modelling of autoignition chemistry kinetics in computational fluid dynamics", Doctoral thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2011. Available at: https://urn.nsk.hr/urn:nbn:hr:235:900863

Metadata
TitleNumerical modelling of autoignition chemistry kinetics in computational fluid dynamics
Title (croatian)Numeričko modeliranje kemijske kinetike samozapaljenja u računalnoj dinamici fluida
AuthorMarko Ban
MentorNeven Duić (mentor)
Committee memberZoran Lulić (predsjednik povjerenstva)
Committee memberNeven Duić (član povjerenstva)
Committee memberDaniel Rolph Schneider (član povjerenstva)
Committee memberŽelimir Kurtanjek (član povjerenstva)
Committee memberPeter Priesching (član povjerenstva)
strani drzavljanin: Nije dostupno
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2011-09-14, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Process Energy Engineering
Universal decimal classification
(UDC)		51 - Mathematics
Abstract
The research in this work aims at improving application of the simulation of fuel ignition, focusing on the low-temperature auto-ignition phenomenon. The simulation of low temperature ignition has been typically achieved by using computationally demanding calculations of complex chemistry kinetics. This work attempts to reproduce the effects of complex chemistry by developing the methodology of efficient database creation consisting of the relevant ignition data used by existing combustion models. The research was separate in several phases: pre-processing, tabulation with data post-processing, and finally the implementation in the CFD software. In the pre-processing stage, available reaction mechanisms of most popular fuels have been thoroughly investigated and compared focused on their accuracy and complexity. Criteria for low- and high-temperature ignition were discussed as implemented into the tabulation application. In the post-processing part of the tabulation, several methods of data manipulation are suggested in forms of correlation functions and repair algorithms, used on the incomplete databases. Additionally, an approach of using existing data for two fuels to calculate the ignition values for their blend dependant only on the previously stored values and the blending factor is presented for the case of a fuel with varying research octane number. Finally, the database implementation into the CFD software is presented and validated. The validation was done in two stages. Initially the implemented data was compared against the results of the homogeneous reactor calculations using a comprehensive mechanism and in the final stage the model was used in a real-life case and successfully validated proving the viability of the entire process.
Abstract (croatian)
Glavna namjera istraživanja ovog rada je izvesti numerički učinkovite algoritme za modeliranje zapaljenja goriva s posebnim fokusom na fenomen niskotemperaturnog zapaljenja. \Numerička simulacija niskotemperaturnog zapaljenja dosad se uglavnom postizala računalno zahtjevnim izračunima složene kemijske kinetike, dok će ovaj rad pokušati razviti nove postupke učinkovite izrade baza podataka koje sadrže informacije o efektima složene kemijske kinetike potrebne za simulaciju zapaljenja goriva. Istraživanje je jasno podijeljeno u nekoliko faza: pred-procesiranje, tabelacija s post-procesiranjem podataka, te na kraju implementacija u CFD aplikaciju. U prvoj fazi, pred-procesiranju, detaljno su predstavljeni dostupni reakcijski mehanizmi za popularna goriva, te su isti međusobno uspoređeni prema njihovoj točnosti i kompleksnosti. Zatim je prikazan način modeliranja nuladimenzijskog proračuna s kriterijima određivanja nisko- i visokotemperaturnog zapaljenja. U sljedećoj fazi, post-procesiranju, predloženi su alati za manipulaciju izračunatim podacima, s posebnim fokusom na popunjavanje krnjih baza podataka korelacijskim funkcijama i matematičkim algoritmima. Dodatno, predložen je i način korištenja postojećih podataka za pojedina goriva pri izračunavanju karakterističnih veličina za njihovu smjesu. U tom se slučaju koriste samo vrijednosti za izgaranje svako goriva (čistog) i faktor miješanja. Princip je provjeren na gorivu varijacijom istraživačkog oktanskog broja. \Na kraju, prikazana je implementacija u CFD aplikaciju te je ista i validirana u dvije faze. Prvo je napravljena usporedba s proračunom homogenog kemijskog reaktora s kompleksnim reakcijskim mehanizmom a na samom kraju i primjer stvarne komore izgaranja što je pokazalo valjanost modela i cijele procedure.
Keywords
Keywords (croatian)
Languagecroatian
URN:NBNurn:nbn:hr:235:900863
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 on2020-05-14 12:03:18