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Technical Paper

Systematic Investigation of Fuel Film Evaporation

2018-04-03
2018-01-0310
To meet future particulate emission limits is quite ambitious for gasoline engines working with direct injection. It was found that there is a relationship between the fuel deposited on the combustion chamber surfaces due to spray impingement and the soot emissions. To understand and avoid the fuel film formation, measurements of the fuel film thickness and mass are important. However, in practical applications fuel films in general are not always problematic as long as they evaporate in time before ignition. Therefore, a systematic investigation of the evaporation duration of fuel film resulting from spray/wall interaction using high-speed visualization was performed. The investigation focused on the influence of engine related operating parameters on the film evaporation duration under the typical homogeneously charged gasoline engines conditions.
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