Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
KINETIC STUDY OF COMBUSTION OF PREMIXED NATURAL GAS - DIESEL-AIR MIXTURES
Submission Author:
Paulo Gabriel Cunha Martins , SP
Co-Authors:
Paulo Gabriel Cunha Martins, Cristiane Aparecida Martins, Rene Gonçalves
Presenter: Paulo Gabriel Cunha Martins
doi://10.26678/ABCM.COBEM2019.COB2019-0959
Abstract
This work aims to development of a numerical simulation using the software Chemkin Pro 2017 in order to determine the laminar burning velocity of Natural Gas and Diesel in a reactor with constant pressure 0.1 MPa and different initial temperatures 358 K, 393 K and 428 K. Natural Gas and Diesel were considered as methane and n-heptane respectively. The laminar burning velocity was carried out for the n-heptane-methane-air mixtures at different proportions of fuel compositions and equivalence ratio ranging from 0.7 to 1.5. As methodology of analysis two kinetic reaction mechanisms was used, the reduced and the detailed n-heptane mechanisms, containing respectively, 160 species with 770 reactions, and 550 species with 2450 reactions. The simulations were validated comparing the results with some experimental results present in literature. The divergence of the results obtained for the simulations using the reduced and the detailed n-heptane mechanism diverged from the experimental results at around 20$\%$ and 5$\%$ respectively. Besides, it is planned to simulate some compositions studied previously in an IC (internal combustion) engine module, in order to investigate the variation of species, pressure, temperature relating with the crank rotation angle. Beyond that, it will be compared between the compositions and the equivalence ratio the temperature of burning, power generated and specific fuel consumption of the samples.
Keywords
natural gas, Diesel, Laminar burning velocities, n-heptane detailed mechanism, n-heptane reduced mechanism
