Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
ANALYSIS OF THE COMBUSTION PROCESS IN AN ENGINE ADAPTED WITH PRE-CHAMBER USING A ZERO DIMENSIONAL NUMERICAL MODEL AND A THREE-DIMENSIONAL MODEL
Submission Author:
Bruno Silva de Lima , MG
Co-Authors:
Bruno Silva de Lima, Kilder Fagundes, Gabriel Faria, Tamara Passos Pimenta, Carlos Castilla
Presenter: Bruno Silva de Lima
doi://10.26678/ABCM.ENCIT2018.CIT18-0725
Abstract
The reduction in the emission of gases combustion products and the reduction of the specific consumption of fuel make an important part in the design of new internal combustion engines, aiming at protecting the environment. One of the methods of achieving this goal is the burning of poor mixtures, using a pre-chamber ignition system. In this work a zero dimensional mathematical model developed in in a Matlab® routine starting from mass and energy balance and a three-dimensional CFD model in commercial software were used to analyze the combustion of the engine. A comparison of the results between the two models made possible the analysis of the behavior of the zero dimensional model, identifying it as a strong tool to design and characterize the combustion process in a fast way and a low computational cost. On the other hand, although the three-dimensional model has a higher computational cost, it was possible to analyze the flow and propagation of the flame in regions of interest and complex engine geometries, as well as to analyze flame front parameters. In general, the models showed good agreement when it comes to overall engine parameters, and it is possible to identify the advantages and disadvantages of each one. It is up to the designer to analyze which tool should be used, depending on the purpose of the modeling and the design phase of the engine.
Keywords
Numerical simulation, INTERNAL COMBUSTION ENGINES, Pre chamber
