Single Channel Laminar Flat Flame Simulations

In chapter 5, full 2-D reacting flow simulation of the flat flame burner was reported. A second order fit was found to be appropriate to describe the flame dynamics predicted by the CFD model. However, the phase relationship between the unsteady heat release rate (q′) and the incoming fluid stream velocity fluctuation (u′) was not correctly predicted. Also, the low frequency resonance phenomenon was not captured. The objective of the second part of laminar forced response studies is to propose a CFD model that is able to correctly predict both magnitude and phase relationships between q′ and u′. Several changes have been made to the original full 2-D CFD model and the new model is described in this section.