EVALUATION OF GASOLINE DIRECT INJECTION SPRAY MORPHOLOGY FOR VARIES INJECTION PRESSURE USING DISCRETE PHASE MODEL (DPM) APPROACH

Abstract

Gasoline fuels are a primary fuel that is used widely in engine applications. However, it has contributed to carbon dioxide and particulate matter which led to greenhouse gas emissions. Researchers have conducted many studies to overcome this emission and improve engine fuel injection. These include altering the injection timing, optimizing the fuel-air mixture, and developing advanced technologies such as direct and multi-point injection systems. This study uses the Computational Fluid Domain approach to analyze the spray pattern and characteristics of gasoline direct injection into an engine chamber at different injection pressures. This simulation setup using Ansys Fluent will apply the discrete phase model and a realizable k-epsilon viscous model. The injection pressure varies at 40 bar, 120 bar, 200 bar, and 300 bar. From this simulation study, the high injection pressure of up to 300 bar produces more extended spray penetration and finer droplet atomization. The results demonstrated that direct fuel injection with high injection pressure can contribute to better fuel-air mixing and reduce carbon emissions.