ID#: 98
Abstract Title: Modelling of Premixed Counterflow Flames Using the Flamelet-Generated Manifold Method
Session Title: Flames
Session Date: 7/31/01
Session Start Time: 11:20 AM
Contributing Author: Van Oijen, J.A.
Organization: Eindhoven University of Technology
Country: The Netherlands
Authors: J.A. van Oijen, L.P.H. de Goey
Short Abstract: The recently introduced reduction technique called flamelet-generated manifold (FGM) method is used to compute premixed methane/air counterflow flames. In the FGM method the ideas of the manifold and the flamelet approach are combined: a manifold is constructed using one-dimensional flamelets. In this paper the effect of flame stretch on the accuracy of the FGM method is investigated. In the case of unit Lewis numbers a one-dimensional manifold is able to model the main effects of flame stretch. A manifold with two progress variables reproduces the results computed using detailed kinetics almost exactly. When non-unit Lewis numbers are used, the enthalpy and element composition of the burnt mixture change, which influences the mass burning rate significantly. If these composition changes are included in the manifold using an additional controlling variable, the results agree well with detailed computations.