Simulation of a partially premixed laminar counterflow Flame Using 2D flamelet generated manifold

In this study, a 2D flamelet method is presented based on the premixed regime. This method can be considered as a combination of two existing reduced chemistry approaches i.e. the flamelet and manifold approach. This method shares the idea with the flamelet approaches that a multi-dimensional flame may be considered as a set of one-dimensional flames (flamelet method) and the flame structure is considered by some control variables. By this method, the database of chemical variables is constructed in terms of progress and controlling variables. During flame simulation, conservation equations have to be solved for the controlling variables only and the properties are interpolated from the database. In this research, 2D flamelet generated manifold is applied for laminar counterflow flames with two parameters (progress variable and mixture fraction). Test results of premixed counterflow flame show that detailed chemistry computations are reproduced very well by using 1DFGM with only progress variable. Predictions of temperature and major species mass fractions using 2DFGM have shown very good agreement with detailed chemistry computations especially, in high strain rates. Using the FGM method, the computation time has been reduced several times in simulating flames, demonstrating the enormous potential of the method.