Engine LES with Fuel-Spray Modeling
Mateus Dias Ribeiro1; Maurício Araújo Zanardi1; José Antônio Perrella Balestieri1; Peter Janas2; Rafael Aguera Rezeno da Silva3; Alex de Souza Rodrigues3
1 Universidade Estadual Paulista - UNESP; 2 Universität Duisburg-Essen; 3 ThyssenKrupp Metalúrgica Campo Limpo
doi:10.20906/CPS/CILAMCE2015-0104
Resumo
Direct injection spark ignition (DISI) engines aim to reduce the specific fuel consumption, while respecting the strict emission standards for internal combustion engines. The development of models to correctly describe the physical phenomena related to the injection of fuel sprays in engine combustion chambers became more relevant over the last years. In this work, large eddy simulations (LES) of the "Spray G" multi-hole gasoline injection test case provided by the ECN (Engine Combustion Network) were performed. Special attention was given to the phenomena of momentum exchange, droplet breakup, evaporation and an Eulerian-Lagrangian method was used to couple the discrete medium (spray particles) with the continuous medium (gas phase). The Reitz-Diwakar model was employed for the droplet breakup and the Ranz-Marshall model for the heat transfer between liquid and gas phase. The penetration length of the spray jet obtained by LES was validated against experiments and good agreement was observed.
Palavras-chave: Spray; Internal Combustion Engine; OpenFOAM; LES; ECN