The prediction of flash evaporation in superheated fuel injections for automotive applications

Negro, Sergio (2011) The prediction of flash evaporation in superheated fuel injections for automotive applications, [Dissertation thesis], Alma Mater Studiorum Università di Bologna. Dottorato di ricerca in Meccanica e scienze avanzate dell'ingegneria: progetto n. 2 "Ingegneria delle macchine e dei sistemi energetici", 23 Ciclo.
Documenti full-text disponibili:
[img] Documento PDF (English) - Accesso riservato - Richiede un lettore di PDF come Xpdf o Adobe Acrobat Reader
Download (3MB)


In gasoline Port Fuel Injection (PFI) and Direct Injection (GDI) internal combustion engines, the liquid fuel might be injected into a gaseous ambient in a superheated state, resulting in flash boiling of the fuel. The importance to investigate and predict such a process is due to the influence it has on the liquid fuel atomization and vaporization and thus on combustion, with direct implications on engine performances and exhaust gas emissions. The topic of the present PhD research involves the numerical analysis of the behaviour of the superheated fuel during the injection process, in high pressure injection systems like the ones equipping GDI engines. Particular emphasis is on the investigation of the effects of the fuel superheating degree on atomization dynamics and spray characteristics. The present work is a look at the flash evaporation and flash boiling modeling, from an engineering point of view, addressed to keep the complex physics involved as simple as possible, however capturing the main characteristics of a superheated fuel injection.

Tipologia del documento
Tesi di dottorato
Negro, Sergio
Dottorato di ricerca
Scuola di dottorato
Ingegneria industriale
Settore disciplinare
Settore concorsuale
Parole chiave
flash evaporation flash boiling superheated fuel injection non-equilibrium homogeneous model GDI engine effervescent atomization
Data di discussione
29 Marzo 2011

Altri metadati

Gestione del documento: Visualizza la tesi