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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
A simplified model for compression-ignition internal combustion engines analysis by using detailed chemical kinetics
Submission Author:
Augusto Romano , SC
Co-Authors:
Augusto Romano, Leonel R Cancino
Presenter: Augusto Romano
doi://10.26678/ABCM.ENCIT2020.CIT20-0069
Abstract
Compression-ignition internal combustion engines are widely used in the transportation and agricultural industry sectors. However, it is known that they are responsible for much of the environmental and urban pollution. Also, since fossil fuels come from limited sources, there is a need to look for new sources, more viable and less polluting. In this way, many studies have been done, attempting to new techniques to improve the combustion and utilization of fuels from renewable sources that may cause less environmental impacts, such as ethanol. This work aims to numerically study a simplified compression ignition engine, using diesel / ethanol blends as fuel. A diesel fuel surrogate was chosen to represent the diesel oil, the ethanol content was varied in 7 different percentages (from 0.0\% to 15.0\% ethanol vol.\% with $\Delta$2.5\%), and varying the engine speed (from 2500 to 4000 rpm with $\Delta$100 rpm). In order to understand the effect of the multiple injection technique, three injection strategies where defined. Numerical simulation was performed using a detailed kinetics mechanism using an in-house-code over Python / CANTERA platform. After results, analysis of the expansion power and emissions of formaldehyde, carbon monoxide and nitrogen monoxide were performed. The analyses were made based on some simplifying hypotheses, so improvements can still be made in order to obtain more accurate results.
Keywords
Diesel surrogate, ethanol, Compression ignition internal combustion engines, Detailed chemical kinetics, CANTERA
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