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Titolo:
Spray structure and characteristics of high-pressure gasoline injectors for direct-injection engine applications
Autore:
Lee, CS; Lee, KH; Chon, MS; Kim, DS;
Indirizzi:
Hanyang Univ, Dept Engn Mech, Seoul 133791, South Korea Hanyang Univ Seoul South Korea 133791 gn Mech, Seoul 133791, South Korea Daewoo Motor Co Ltd, Ctr Tech, Inchon, South Korea Daewoo Motor Co Ltd Inchon South Korea d, Ctr Tech, Inchon, South Korea Hanyang Univ, Grad Sch, Seoul 133791, South Korea Hanyang Univ Seoul South Korea 133791 rad Sch, Seoul 133791, South Korea
Titolo Testata:
ATOMIZATION AND SPRAYS
fascicolo: 1, volume: 11, anno: 2001,
pagine: 35 - 48
SICI:
1044-5110(200101/02)11:1<35:SSACOH>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Lee, CS Hanyang Univ, Dept Engn Mech, Seoul 133791, South Korea Hanyang Univ Seoul South Korea 133791 Seoul 133791, South Korea
Citazione:
C.S. Lee et al., "Spray structure and characteristics of high-pressure gasoline injectors for direct-injection engine applications", AT SPRAYS, 11(1), 2001, pp. 35-48

Abstract

This article presents an experimental analysis of spray development, spraytip penetration, and the macroscopic characteristics of a high-pressure gasoline injector for direct-injected gasoline engine applications. Also, this study deals with microscopic characteristics of the fuel spray, such as mean droplet size, mean velocity, and the instantaneous velocity vector fields in the fuel spray of a high-pressure injector The spray development, spray penetration, and global spray structure H ere visualized using a shadowgraph technique. Atomization characteristics of the fuel spray such as mean droplet sizes and mean velocities were measured using the phase Doppler particle analyzer system. In addition, instantaneous velocity vector fields ofthe fuel spray with time after injection sere obtained from cross-correlation particle image velocimetry. The experimental results obtained provide the effect of injection pressureon the spray behaviors, spray structure, microscopic characteristics of the fuel spray, and the velocity vector fields at different moments after thestart of injection. The injection pressure of the fuel is an important factor, which has an effect on the spray development processes involving the spray tip penetration, spray width, and mixing of fuel droplets and ambient air. With an increase in fuel injection pressure, the droplet size decreases, and the location of maximum droplet size appears farther downstream thanin the case of low injection pressure. The results of spray visualization show that the counterrotating vortex along the outer edge of the spray surface is observed at a later stage of fuel injection, and it continues until right after the end of fuel injection. The velocity vector fields by particle image velocimetry show detailed flow vectors and spray development processes in the fuel sprays at different elapsed times after the start of injection.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/04/20 alle ore 13:36:51