CFD COMPUTATIONS OF EMISSIONS FOR LDI-2 COMBUSTORS WITH SIMPLEX AND AIRBLAST INJECTORS

摘要

An effort was undertaken to perform CFD analysis of fluid flow in Lean-Direct Injection (LDI) combustors with axial swirl-venturi elements for the next-generation LDI-2 design. The National Combustion Code (NCC) was used to perform non-reacting and reacting flow computations on several LDI-2 injector configurations in a thirteen-element injector array for different operating conditions. All computations were performed with a consistent approach of mesh-optimization, spray-modeling, ignition and kinetics-modeling with the NCC. Computational predictions of emissions (EINOx, EICO and UHC) were compared with the two sets of experimental data representing respectively low-pressure and high-pressure engine cycle conditions.