CFD Modeling and Validation of the ECN Spray G Experiment Under a Wide Range of Operating Conditions
The increasing diffusion of gasoline direct injection (GDI) engines requires a more detailed and reliable description of the phenomena occurring during the fuel injection process. Currently, one drawback of GDI engines is represented by the impingement on the piston wall, due to typically adopted hollow-cone fuel sprays, which can lead to high emissions of unburned hydrocarbons and soot formation. Within this context, the extensive validation of multi-dimensional models by means of experimental data represents a fundamental task to accurately predict the physical phenomena characterizing the injected spray. The aim of this work was to simulate with OpenFOAM different operating conditions of the 8-hole, ECN Spray G injector placed into a constant volume vessel. The resulting developments of the jet plumes were assessed, along with the physical effects of injection pressure and wall temperature on the wall impingement phenomenon.