STUDY OF BIODIESEL INJECTION OF FLUID DYNAMICS IN DIESEL ENGINES USING OPENFOAM

Resumo

Since the nineteenth century, internal combustion engines their development due to
thermodynamic models that describe their operation. The combustion and performance of a diesel
cycle engine depend on the quality of the air-fuel mixture and the amount of fuel injected. A
homogeneous blend results in reduced particulate emissions and higher engine efficiency. For fuel
injection optimization in compression-ignition engines, the use of computational methods as a tool is a
viable scientific method. Adding to this the implementation of free and open software enhances the
advantages of numerical methods, since it allows the researcher to have access and can modify the
routines and algorithm used in the simulation calculations. This work aims to study the injection of
biodiesel (soy) in diesel engines with direct injection. The simulations were performed with
OPENFOAM v6, using the cavitatingFoam solver, for the treatment of flow with phase change (liquid
- vapour), the simulation is transient, with three-dimensional geometry based on the BOSCH CRIP-1
injector, the turbulence model used and the κ-ω SST. The results of numerical simulations compared
with experimental data available in the literature. Preliminary results show the occurrence of cavitation
in the injection channel as a function of injection pressure.