n-Heptane Chemical Mechanism Evaluation for Conterflow Nonpremixed Flame Structure on 1D and 2D Open Source Codes
Oberdan Miguel Rodrigues de Souza1; Sergio Leal Braga1; Wladimyr Mattos da Costa Dourado2
1 Pontifícia Universidade Católica do Rio de Janeiro; 2 Instituto de Aeronáutica e Espaço
doi:10.20906/CPS/COB-2015-1719
Resumo
Due environmental and economic reasons the combustion processes that occurs on engines and industrial applications must to be investigated more deeply. The combustion of n-C7H16 has been investigated with chemical mechanism for analyses of burning velocities, the structure and extinction of nonpremixed flames for diesel engines The number of operations required for solving the chemical kinetics in CFD simulations depends on the number of cells in the mesh and the size of the oxidation mechanism. The size of the mechanism defines the level of complexity to integrate the system of high degree of stiff nonlinear ODE. Steady, axisymmetric, laminar flow of two counterflowing streams toward a stagnation plane is considered where the a fuel stream made up of prevaporized n-heptane and nitrogen injecteds. The experimental data of conterflow flame non- premixed by Berta et al. (2008) are compared with numerical simulations in codes Cantera, with a model one-dimensional, and OpenFoam, with a model two-dimensional and time dependent.
Palavras-chave: Combustion; Kinetics Reaction Mechanisms,; n-Heptane; Laminar flame; Non-premixed counterflow flames