KNOCK ANALYSIS VIA NUMERICAL UNIDIMENSIONAL MODEL OF A SINGLE CYLINDER RESEARCH ENGINE CORRELATED WITH EXPERIMENTAL DATA
Thiago Dale Borgatti1; José Guilherme Coelho Baeta1; Gustavo Hindi2
1 Department of Mechanical Engineering, Federal University of Minas Gerais; 2 Fiat Chrysler Automobiles (FCA)
doi:10.20906/CPS/CILAMCE2017-0493
Resumo
In Brazil the focus in the renewable matrix research field gains an especial attention due to the concern about GHG (Greenhouse Gases). Besides, ethanol fuel allows exploring better spark authority and higher compression ratio. Combined with dynamometric tests, the 0/1D CFD analysis became an important tool in understanding the phenomenological models involving combustion, volumetric efficiency, heat transfer and friction. The main purpose of this paper is to develop a numerical unidimensional model using the software GT-SUITE, that represents the Single Cylinder Research Engine (SCRE) used in this work. The numerical validation will be performed by two methods: TPA (Three Pressure Analysis) and non-predictive combustion model using a Wiebe function. The correlation with the experimental data will be compared and explained for the two methods, using Hydrous Ethanol at an engine speed of 2000 rpm and load of 8 bar BMEP. The Knock detection model will be implemented for E10 (10% anhydrous ethanol / 90% gasoline) at engine speed of 3000 rpm and load of 6 bar BMEP and E22 (22% anhydrous ethanol / 78% gasoline) at an engine speed of 2500 rpm and load of 8 bar BMEP.
Palavras-chave: 0/1D CFD; Internal Combustion Engine; GT-SUITE; Knock