Coupled simulations of nozzle flow, primary fuel jet breakup, and spray formation

Eberhard von Berg (Avtor), Wilfried Edelbauer (Avtor), Aleš Alajbegović (Avtor), Reinhard Tatschl (Avtor), Martin Volmajer (Avtor), Breda Kegl (Avtor), Lionel C. Ganippa (Avtor)

Povzetek

Presented are two approaches for coupled simulations of the injector flow withspray formation. In the first approach the two-fluid model is used within the injector for the cavitating flow. A primary breakup model is then applied at the nozzle orifice where it is coupled with the standard discrete droplet model. In the second approach the Eulerian multi-fluid model is applied for both the nozzle and spray regions. The developed primary breakup model, used in both approaches, is based on locally resolved properties of the cavitating nozzle flow across the orifice cross section. The model provides the initial droplet size and velocity distribution for the droplet parcels released from the surface of a coherent liquid core. The major feature of the predictions obtained with the model is a remarkable asymmetry of the spray. This asymmetryis in agreement with the recent observations at Chalmers University where they performed experiments using a transparent model scaled-up injector.The described model has been implemented into AVL FIRE computational fluid dynamics code which was used to obtain all the presented results.

Ključne besede

motorji z notranjim zgorevanjem;vbrizgavanje gorva;simulacije;internal combustion engines;fuel injection;simulations;

Podatki

Jezik:	Angleški jezik
Leto izida:	2005
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UM FS - Fakulteta za strojništvo
UDK:	621.43.038
COBISS:	9921046
ISSN:	0742-4795
Št. ogledov:	1282
Št. prenosov:	81
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarne ključne besede:	motorji z notranjim zgorevanjem;vbrizgavanje gorva;simulacije;
URN:	URN:SI:UM:
Strani:	str. 897-907
Letnik:	ǂVol. ǂ127
Zvezek:	ǂno. ǂ4
Čas izdaje:	Oct. 2005
ID:	8718331