Modelling of Turbulent Methane‐Air Diffusion Flames: The Laminar‐Flamelet Model

Abstract

An extended laminar diffusion flamelet model of turbulent non-premixed combustion is applied to an open methane-air jet diffusion flame. The structure of the laminar flamelets is determined numerically in the counterflow geometry using a detailed mechanism for the methane-air system consisting of more than 250 elementary reactions of 39 chemical species. The results of the laminar-flamelet calculations are incorporated into a detailed computation of the turbulent flow field using a k -E turbulence model. Results from both the laminar and the turbulent flame predictions are compared to experimental data available from the literature.

Stationary edge flames in a wedge with hydrodynamic variable-density interaction

“…Here, non-trival flows or turbulence can cause local extinction of a flame before the fuel and oxidizer has been fully consumed, create interfaces between the mixed reactants and the pure fuel and oxidizer streams, and otherwise form flames which have features of both premixed and diffusion flames. The study of these partially premixed flames is also extensive [21,22].…”