Large-Eddy Simulation of Turbulent Flow in the Intake and Compression Strokes of Four-Valve Gasoline Engine

摘要: By amending the engine CFD package(KIVA-3V),the large-eddy simulation(LES) model of in-cylinder cold state flow field for internal combustion was built up.The turbulent fields in intake and compression strokes a four-valve gasoline were simulated by using this model.In comparing computational results with obtained k-e model,it is found that LES exhibit more complex structure.Evidently,the can capture large number irregular small-scale vortical structure coherent large-scale structure,but not usually.