Swirl-Spray Interactions in a Diesel Engine
Published March 5, 2001 by SAE International in United States
Annotation of this paper is available
Event: SAE 2001 World Congress
Swirl in Diesel engines is known to be an important parameter that affects the mixing of the fuel jets, heat release, emissions, and overall engine performance. The changes may be brought about through interactions of the swirling flow field with the spray and through modifications of the flow field. The purpose of this paper is to investigate the interaction of the swirl with sprays in a Diesel engine through a computational study. A multi-dimensional model for flows, sprays, and combustion in engines is employed. Results from computations are reported with varying levels of swirl and initial turbulence in two typical Diesel engine geometries. It is shown that there is an optimal level of swirl for each geometry that results from a balance between increased jet surface area and, hence, mixing rates and utilization of air in the chamber. Results are also reported for several split injection strategies to assess whether the interactions observed with a single injection event are applicable.
CitationMcCracken, M. and Abraham, J., "Swirl-Spray Interactions in a Diesel Engine," SAE Technical Paper 2001-01-0996, 2001, https://doi.org/10.4271/2001-01-0996.
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