Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.
A low-order discrete dynamical system (DDS) model for
finite-rate chemistry of H2-air combustion is derived in 3D. Simulation
is performed in the context of a new subgrid-scale (SGS)
method. Regime maps are used to determine useful ranges of
values for bifurcation parameters. Specifically, a nine-step mechanism
of H2-air reactions with N2-dilution is studied. As input to
the DDS model, one fixed position within the flow chosen from
Meier et al., is used (Combustion Science and Technology, 1996).
The results in terms of time series of velocities, species mass
fractions and the sum of mass fractions are analyzed. Moreover,
the results are compared with experimental data at the selected
position in the flame field. Discrepancies between computed and
experimental results are discussed, and possible causes for discrepancies
are analyzed. The potential of applying the current
DDS in large-eddy simulation is addressed.