Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
ASYMPTOTIC ANALYSIS OF METHANE REDUCED KINETIC MECHANISM
Submission Author:
Rafaela Sehnem , RS
Co-Authors:
Rafaela Sehnem, Regis Sperotto de Quadros, Daniela Buske
Presenter: Regis Sperotto de Quadros
doi://10.26678/ABCM.ENCIT2018.CIT18-0291
Abstract
This work presents the chemical reactions required to model the combustion of methane, including the submechanisms of carbon monoxide and hydrogen, which are important in the oxidation of other hydrocarbons and larger biofuels, such as methanol and ethanol. These models present a high degree of stiffness, which makes numerical resolution of the systems of ordinary differential equations difficult. In order to moderate the degree of stiffness and decrease the number of species involved, a four-step strategy is applied to obtain reduced mechanisms. A four-step mechanism for methane with seven chemical species is shown - including a three-step mechanism for carbon monoxide and a two-step for hydrogen - and the numerical results for the mass fraction is presented.
Keywords
methane, Combustion, Rosenbrock, stiffness
