Study of the Portability of a 3D CFD Model for the Dynamics of Sprays Issuing from Multi-Hole GDI Injectors CNR - Istituto Motori

Format:

Conference/Event

Author/Creator:

Allocca, Allocca, author.

Contributor:

Costa, M.

Montanaro, A.

Sorge, U.

Conference Name:

SAE International Powertrains, Fuels and Lubricants Meeting (2011-08-30 : Kyoto, Japan)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2011

Summary:

Three high pressure multi-hole GDI injectors, one manufactured by Continental, two manufactured by Bosch, are experimentally characterized under various injection strategies in terms of instantaneous mass flow rate and fuel dispersion. Spray visualization within an optically accessible pressure vessel allows the measurement of the single jet cone angle and penetration length.A portable numerical model for the issuing spray dynamics is developed within the AVL Fire code, exploiting a log-normal distribution for the initial droplets diameter, whose expected value and variance are properly defined as a function of the main physical parameters. Tuning of the entering constants is realized by means of an automatic optimization procedure.An example of application of the spray model within a 3D simulation of the in-cylinder process of a GDI engine is presented. Effects of splitting injection into two successive events are discussed

Notes:

Vendor supplied data

Publisher Number:

2011-01-1897

Access Restriction:

Restricted for use by site license