Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
FLAME STRUCTURE OF DIESEL SURROGATE COMBUSTION IN A COUNTERFLOW DIFFUSION FLAME
Submission Author:
Edgar Aguilera , Central , Paraguay
Co-Authors:
DARIO ALVISO, Raúl Gómez
Presenter: DARIO ALVISO
doi://10.26678/ABCM.ENCIT2016.CIT2016-0222
Abstract
The Mario Molina Center et al. 2014 conducted study concerning air pollutants in the urban area of the city of Asunción. The results showed that residents of Asunción are exposed to high levels of air pollution particles (ranging between 2.5 and 10 microns) and nitrogen dioxide that threatens their health. In addition, the study showed that public transportation has an important role in this problem, due to the fact that emission of particles is one of the main problems of Diesel engines (about 80 % of the total fleet in Paraguay). In order to characterize the emission and performance of the engine, most of experimental studies of Diesel fuel combustion are performed using internal combustion engines. From the numerical point of view, many studies are performed using homogeneous reactors. However, due to the complexity of its chemical composition, there are only few studies on kinetic modeling of such fuel in a 1D configuration. This paper presents numerical studies of Diesel surrogate combustion in laminar counterflow diffusion flame configuration. The key objective of the study is to understand the flame structure of Diesel fuel and validate the kinetic models used in the simulations in a close future. The kinetic modelling for Diesel oxidation in the counterflow diffusion flame was performed using the COUNTERFLOW code within the REGATH package developed at EM2C laboratory (Centrale Supelec, France), that takes into account the detailed kinetic and transport phenomena (heat and mass transfer) through a numerical predictive 1D code. The kinetic model of Andrae et al (2011) was chosen to carry the simulations. This model consists of 150 species and 759 reactions. A surrogate Diesel fuel composed of 70 % n-heptane and 30 % toluene (vol) was chosen to represent Diesel chemistry. Different equivalence ratios and strain rates of Diesel counterflow diffusion flames were studied. The flames structures were analysed and presented.
Keywords
Combustion, Diesel Surrogates, N-heptane, Toluene
