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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
EVALUATION OF ZERO-DIMENSIONAL CO AND NO ENGINE EMISSIONS MODELS AND THEIR SUITABILITY FOR E10
Submission Author:
Oswaldo Franca , SP
Co-Authors:
Oswaldo Franca, Rogério Gonçalves dos Santos, Clayton Zabeu, Mario Martins
Presenter: Oswaldo Franca
doi://10.26678/ABCM.ENCIT2020.CIT20-0496
Abstract
Emissions standards are getting more stringent year after year, requiring greater development efforts. More and more emissions tests have to be ran, until the engine is sufficiently tuned for the market. On the other hand, building prototypes is very expensive. One way of reducing development costs and time is the use computer simulations. However, in order to predict emissions, more complex and computationally expensive methods are usually necessary, like three-dimensional (3D) computational fluid dynamics (CFD) coupled with chemical kinetics calculations. Such simulations can take very long, even for one single case, making them only worth it for conceptual development. This work aims at evaluating zero-dimensional (0D) kinetic emissions models and their suitability in predicting CO and NO exhaust emissions from combustion of E10 (a mixture of 10% ethanol with 90% gasoline). Test bench results from a 3 cylinder, 1.2 liter turbocharged direct injection spark ignition (DISI) engine, running on E10, were used as reference for evaluating model accuracy and suitability for this fuel. Although the model presented high deviations compared to measurements, over predicting CO and under predicting NO, results pointed out that the general trend for emissions, at full load and as function of engine speed, could be captured. Further model improvements would be possible through calibration of multiplier coefficients and the addition of a NO2 kinetic model.
Keywords
Engines, emissions, Simulation
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