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Titolo:
Numerical studies of an impingement-conditioned small direct-injection diesel engine
Autore:
Bai, C; Gildein, H; Breitling, T;
Indirizzi:
Univ London Imperial Coll Sci Technol & Med, Dept Mech Engn, London SW7 2BX, England Univ London Imperial Coll Sci Technol & Med London England SW72BX gland Daimler Benz AG, Forschungsinst Mercedes Benz, Stuttgart, Germany Daimler Benz AG Stuttgart Germany nst Mercedes Benz, Stuttgart, Germany
Titolo Testata:
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING
fascicolo: D4, volume: 213, anno: 1999,
pagine: 379 - 390
SICI:
0954-4070(1999)213:D4<379:NSOAIS>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Keywords:
small direct-injection diesel engine; droplet impingement model; parametric studies;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Bai, C Univ London Imperial Coll Sci Technol & Med, Dept Mech Engn, Exhibit Rd, London SW7 2BX, England Univ London Imperial Coll Sci Technol & Med Exhibit Rd London England SW7 2BX
Citazione:
C. Bai et al., "Numerical studies of an impingement-conditioned small direct-injection diesel engine", P I MEC E D, 213(D4), 1999, pp. 379-390

Abstract

Numerical studies are performed to identify an optimal range of geometric parameters in connection with the design of an impingement-conditioned small direct-injection diesel engine. The parametric studies were made in a pressure chamber with a circular protrusion on to which sprays are directed toimpinge. Computational runs were made for 24 cases carefully chosen to allow examination of the effects on post-impingement spray characteristics of the following parameters: (a) the nozzle-plate distance and (b) the size and geometry pattern of the protrusion. An optimal range of these parameters has been identified through an analysis of the calculated results in terms of vapour concentration, the Sauter mean diameter of the wall spray and thedispersed wall spray volume. The results obtained also reveal that, by just changing the size of the impingement surface and the impingement distance, local fuel vaporization efficiency can be increased as high as 40 per cent under the same injection and ambient conditions. This raises the possibility that spray impingement may be conditioned in a manner ensuring good fuel distribution and a sufficient fuel-air mixing rate without even resortingto swirling air, thus improving substantially the engine efficiency.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/11/20 alle ore 22:32:54