Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Numerical Simulations of Flow and Mixing Formation in Direct Injected Spark Ignition Engines
Submission Author:
Mateus Dias Ribeiro , SP
Co-Authors:
Mateus Dias Ribeiro, Alex Bimbato, Mauricio Zanardi, José Antônio Perrella Balestieri
Presenter: Mateus Dias Ribeiro
doi://10.26678/ABCM.COBEM2017.COB17-0292
Abstract
Direct injection spark ignition (DISI) has the potential to reduce specific fuel consumption and therefore, mitigate emissions of state-of-the-art internal combustion engines. Thus, in this work we present numerical simulations of the complex turbulent flow phenomena in DISI engines, as well as the fuel injection and the in-cylinder charge mixing process. For the simulation of turbulence, a large-eddy simulation (LES) methodology is employed and a Lagrangian-Eulerian approach is used to couple the liquid droplet flow with the hot gas inside the combustion chamber. The case of study concerning the engine flow is the Darmstadt optical engine, for which an extensive validation data bank is available. In regard to the fuel-spray injection, the "Spray G" multi-hole gasoline test case provided by the Engine Combustion Network (ECN) is simulated and validated against experimental data. The results obtained so far agree well with the available experimental data, for both cold flow of the Darmstadt engine and "Spray G" simulation cases.
Keywords
DISI engines, Direct injection, LES, Eulerian-Lagrangian method, OpenFOAM
