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Large-Eddy Simulation for the Prediction of Aerodynamics in IC Engines

In this paper, large-eddy simulation techniques are used to predict aerodynamics through diesel engine intake ports under steady-flow conditions. For the first test case, swirling flows are investigated through an axisymmetric sudden expansion. The LES swirl profile predicted is compared with experimental measurements. For the second test case, a sudden expansion with a valve is tested, where discharge coefficient is compared to experimental data. For the third test case, the same approach is applied to a real engine geometry which has two intake ports. Both the swirl profile and the discharge coefficient are calculated and compared to experiments.