Flamelet Analysis of Turbulent Combustion

Three-dimensional direct numerical simulations are performed of turbulent combustion of initially spherical flame kernels. The chemistry is described by a progress variable which is attached to a flamelet library. The influence of flame stretch and curvature on the local mass burning rate is studied and compared to an analytical model. It is found that there is a good agreement between the simulations and the model. Then approximations to the model are evaluated. 1 Motivation and Objectives The present research is concerned with the direct numerical simulation (DNS) and analysis of turbulent propagation of premixed flame kernels. The simulations are direct in the sense that the smallest scales of motion are fully resolved, while the chemical kinetics are solved in advance and parameterized in a table by the method of the flamelet generated manifolds (FGM) [8]. The state of the reactions are assumed to be directly linked to a single progress variable. The conservation equation for...

• Type: Conference
• Year: 2005
• Where: ICCS
• Authors: R. J. M. Bastiaans, S. M. Martin, H. Pitsch, J. A. van Oijen, L. P. H. de Goey
• Keywords: Direct Numerical Simulation, ICCS 2005, Turbulent Combustion, flame Kernels