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Atomization and Sprays
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ISSN Imprimir: 1044-5110
ISSN On-line: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.v12.i4.30
pages 403-417

THE CHARACTERISTICS OF POSTIMPINGEMENT DIESEL SPRAY, PART I: PENETRATION AND VOLUME

Kyungnam Ko
Department of Mechanical System Engineering, School of Engineering, Gunma University, Kiryu, Japan
Masataka Arai
Division of Mechanical Science and Technology, Faculty of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma, 376-8515, Japan; Tokyo Denki University

RESUMO

The characteristics of the impingement spray were experimentally investigated by comparison with those of the free spray. Diesel fuel spray injected info a high-pressure chamber in a cold state was observed by a drum camera that allowed high-speed photography. Spray penetration and volume of the impingement spray analyzed from the photographs are compared with those of the free spray. Also, the effects of injection rate and ambient pressure on the penetration and the volume of the postimpingement spray are discussed. As to the results, it was found that the injection rate and wall distance became Important factors of the diesel spray behavior with impingement. As the impingement distance was shorter, the volume of impingement spray approximately increased. Also, the volume of spray impinged before breakup was greater than that of the free spray.


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