Coupled modeFRONTIER - FIRE Approach for ICEngine Intake Port Optimization

Giuseppe Tesolin (AVL, University of Trieste)

Internal Combustion Engine (IC-Engine) efficiency and emission characteristics are at great extent, governed by the details of the intake port-combustion chamber arrangement. In this context, the discharge coefficient and swirl/tumble numbers, are commonly used to characterize the intake port with respect to the volumetric efficiency and, at least partly, to the combustion of both diesel and gasoline engines. Hence, the development is aimed at port designs providing optimized discharge characteristics for the entire valve lift range under the constraints of pre-specified (optimum) swirl/tumble level. To achieve the above design goal, CFD simulation has now already been widely accepted as a valuable tool for the analysis and optimization of different port configurations.

So, in a first step, the methodology and framework to couple the 3D-CFD code FIRE with modeFRONTIER will be set up to perform an automated optimization of one selected diesel intake port configuration. For providing the CADsurface data, the CAD package ProEngineer will be adopted. Then the optimization target (merit or objective function) of achieving maximum discharge coefficient under pre-defined constraints for the swirl number, will be performed. At last, the validation of the obtained results will be provided by comparison with the experimental results performed on a test rig.