Parametric Fluid Model for Combustion Gases of an Extra Gasoline Engine

The research is focused on the simulation using Computational Fluid Dynamics (CFD) of the combustion gases of an extra gasoline engine using the Ansys software. As a first step, the input parameters were selected to be able to investigate whether they have any influence on the production of combustion gases such as carbon monoxide (CO), carbon dioxide (CO2). Once the input and output parameters were selected, the input levels were established to create treatments based on the experimental design (DoE), constructing a 32 factorial design giving a total of 9 treatments without repetition. The next step consisted of using the geometry of the combustion chamber that the software provides, in addition to building the areas of interest using Design modeler, to carry out the meshing, detailed meshes were considered in the areas of interest such as the spray and the ignition point using Meshing Autodine tools. The third step consisted of solving the Navier Stokes equations using the k-ε (RNG) Re-Normalization Group turbulence model in conjunction with the fuel injection chemistry and the injection model for flame turbulence modeling. This procedure was carried out for the 9 treatments proposed by the factorial design, with which we proceeded to analyze and interpret the results obtained during the combustion process that occurs between the piston displacement angles of 720–740 Crank Angle (CA).