喷孔数与进气涡流的匹配对柴油机混合与燃烧特性的影响研究

In this paper, multi-dimensional numerical simulation was conducted to study the influence of the matching of the number of nozzle holes and intake swirl on the mixing and combustion charactristics in diesel engine.The result showed that, the mixing rate, uniformity and distribution range of the mixture could be improved while adapting proper intake swirl and injector with less nozzle holes. Using injector with less nozzle holes and larger nozzle diameter would result in larger SMD, but this hinderment is smaller than the promote in other aspects; Adapting the matching of less nozzle holes and appropriate intake swirl could cause in leaner combustion in the early premixed combustion stages , greater overall heat release rate and ultimately more efficient combustion process.