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Spray and Mixture Properties of Group-Hole Nozzle for D.I. Diesel Engine
Published October 01, 2007 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
The group-hole nozzle has a series of groups of holes and each group consists of two small holes with a small spatial interval and a small angle. It is expected that the spray behavior of the group hole nozzle has enough spray tip penetration and smaller mean droplet diameter as compared with the spray injected by the conventional multi-hole nozzle having the hole area same as the group-hole nozzle. To investigate effects of the group hole nozzle on the mixture properties, the extended ultraviolet and visible Laser Absorption Scattering (LAS) technique which can be applied to a non-axis metric spray was developed. Liquid and vapor phase mass distributions in the spray were obtained by the extended LAS. The analyses were made of the free sprays and the flat wall impinging sprays.