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雾化与喷雾
影响因子: 1.262 5年影响因子: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN 打印: 1044-5110
ISSN 在线: 1936-2684

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雾化与喷雾

DOI: 10.1615/AtomizSpr.2014011375
pages 81-98

EFFECTS OF CROSS-FLOW ON FUEL SPRAY INJECTED BY HOLE-TYPE INJECTOR FOR DIRECTINJECTION GASOLINE ENGINE

Min Guo
Department of Mechanical System Engineering, University of Hiroshima, 1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan
Ryousuke Kishi
Department of Mechanical System Engineering, University of Hiroshima, 1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan
Baolu Shi
Department of Mechanical System Engineering, University of Hiroshima, 1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan
Youichi Ogata
Department of Mechanical System Engineering, University of Hiroshima, 1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan
Keiya Nishida
Department of Mechanical System Engineering, University of Hiroshima, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan

ABSTRACT

The quality of fuel spray plays a vital role in the combustion and emission formation processes in a directinjection (DI) gasoline engine. To fundamentally understand the effects of the airflow on the fuel spray in the combustion chamber in a DI engine the characteristics of the fuel spray in a uniform cross-flow field were experimentally investigated in this study. The fuel was injected by a valve covered orifice nozzle for a DI gasoline engine into an optically accessible rectangular wind tunnel under room temperature and pressure, in which the fuel injection was perpendicular to the orientation of the cross-flow. The velocity of the cross-flow varied from 0 to 9.2 m/s while the injection pressure was 5 and 10 MPa. When the velocity of cross-flow is low, the vertical penetration increases with increasing the injection pressure, while in the case of the horizontal penetration, the distance increases with an increase of the injection pressure and velocity. Empirical correlations were deduced for the temporal variation of vertical penetrations as well asthe variation of spray profile in the upstream side with distance along the cross-flow orientation. The velocity of cross-flow plays a more significant role than the injection pressure on the fuel spray in a cross-flow field. Velocity distributions were measured by a particle image velocimetrysystem, and the results show that the horizontal component of the velocity of the atomized droplet was even higher than that of the cross-flow in the lower region of the spray.


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