Numerical Comparison of an Ethanol Spray Using Open FOAM and Star CCM+
Roberto Ribeiro Schor1; Ramon Molina Valle1; Marilia Gabriela Justino Vaz1; Deborah Domingos da Rocha1; Leonardo Mayer Reis1; Rudolf Huebner1
1 UFMG
doi:10.20906/CPS/CILAMCE2017-1242
Resumo
Internal combustion engines are thermal machines that convert chemical energy from fuels into mechanical energy through combustion. Stringent regulations regarding the emission of pollutants demand the development of advanced combustion technologies. The Direct Injection (DI) of fuel into the combustion chamber of a Spark Ignition (SI) engine is a strategy that is widely recognized for having the potential to improve fuel efficiency. In addition, the search of biofuels, such as Ethanol, is an option to reduce the pollution and environmental impacts. The development of an optimized combustion for Ethanol DI engines require a very accurate formation of an ignitable fuel-air ratio, which is a process that begins with the proper injection of fuel. CFD simulations are widely used to analyze the formation of a fuel spray in the cylinder of the engine. Although several mature commercial CFD packages are on the market, there is also the need for a less expensive software. Therefore, there is a growing interest in some software such as OpenFOAM. In this paper it is going to be compared a simulation of a spray produced by a pressure-swirl injector into a static chamber at atmospheric pressure using the commercial software Star-CCM+ with a simulation of the same process but using the open source software OpenFOAM.
Palavras-chave: OpenFOAM; StarCCM+; KHRT; Reitz-Diwakar; CFD