REDUCED CHEMICAL KINETIC MECHANISM APPLIED TO 3D NUMERICAL SIMULATION OF A SINGLE-CYLINDER RESEARCH ENGINE RUNNING A BLEND OF GASOLINE AND ETHANOL IN LOW LOAD REGIMES
Clarissa de Moraes Martins1; Filipe Silva Cota1; Gustavo Queiroz Hindi2; Jose Guilherme Coelho Baeta1; Ramon Molina Valle1
1 Universidade Federal de Minas Gerais; 2 Fiat Chrysler Automobiles LATAM
doi:10.20906/CPS/CILAMCE2017-0577
Resumo
The understanding of the combustion process in spark ignition engines is very important in the development of more efficient engines in both, fuel consumption and energy conversion. Numerical simulations are applied to engines to understand all phenomenona occurring inside it to reduce time and money costs, which would be spent through experimental procedures. Also, reduced chemical reaction mechanisms are important tools in reducing computational cost and to reproduce the combustion process. However, few studies in literature report reduced mechanism validated for GDI engines. In this paper a reduced chemical kinetics mechanism was tested in a 3D CFD simulation of a single cylinder engine running Brazilian Gasoline type C in two different operation regimes (2000 rot/min, BMEP of 0,2 MPa and 4 MPa, homogenous charge) and direct injection of fuel. The comparison between experimental data and the numerical results showed that, under the conditions analyzed, the mechanism tested was not able to reproduce the behavior of the fuel mixture.
Palavras-chave: Spark ignition engines; Gasoline direct injection; Finite volume method; Reduced chemical kinetic mechanism