Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Development and comparison of a phenomenological predictive model of one and two zones for a spark ignition engine
Submission Author:
Ana Paula Mattos , PA
Co-Authors:
Waldyr Gallo, Ana Paula Mattos
Presenter: Ana Paula Mattos
doi://10.26678/ABCM.COBEM2017.COB17-2627
Abstract
This paper presents an analysis of phenomenological model zith one qnd tzo wones for a spark ignition internal combustion engine. The combustion products where modeled depending on the kind of combustion reactions: lean (CO_2, O_2, Ar, H_2O and N_2); Rich (CO_2, H_2O, Ar, CO, H_2 and N_2) and stoichiometric. In the combustion reactions, the oxidizer was considered to be dry air (Ar, N_2, O_2 and CO_2) or moist air. For the mathematical model accomplishment, all substances where considered ideal gases. The properties gases of products of combustion and ethanol are modeled from data of literature. For closed and open phases of the cycle the first law of thermodynamics was applied, while for combustion evolution it was utilized Wiebe’s equation. The model was developed in Matlab using fifth order Runge-Kutta to solve the differential equations in order to obtain temperature, pressure and trapped mass of the cylinder, and Newton-Rapshon method for convergence of mass inside the cylinder. The objective of this work is to present the difference of the results obtained when there is one or two zones in the combustion chamber. The results show that the model with two zones are better than that of a zone, that is, it makes a prediction more consistent compared with values of the literature, and is presented how the speed, relation air-fuel and load influences the results of performance parameters .
Keywords
Modelling of SI, predictive phenomenological model, one or two zones, combustion model
