Abstract

Three dimensional (3D) computational fluid dynamics (CFD) engine simulations can guide and/or complement experimental investigations and provide in-cylinder details that cannot be captured by conventional data acquisition methods. The main objective of this study was to establish a 3D RANS model (i.e., reasonable computational cost and running time) that can predict the efficiency and emissions of a 6V150 diesel engine under different operating conditions. The sub-models include renormalized k-epsilon turbulence model, G-equation model, solid cone breakup model (including hybrid KH-RT model and gas jet model), two-step soot formation model, and etc. The model was validated with experimental data from dynamometer tests. The results indicated that the numerical model captured the combustion and emission characteristics that occurred inside the combustion chamber, demonstrating its capability to evaluate engine characteristics during the development and optimization process.

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