Laminar flamelet modeling of recirculating premixed methane and propane-air combustion

Large-eddy simulation of a fuel-lean premixed turbulent swirl-burner

“…Under the hypothesis formulated in the above sections, filtered quantities (species mass fraction, chemical sources) may be obtained following a procedure already used in the RANS [15,18,31] and LES [6] of turbulent flames:…”

“…Onedimensional laminar premixed flames are simulated for a set of fresh gas conditions, and the species evolutions through the flames are collected versus a progress of reaction to construct tabulated chemistry trajectories. This premixed laminar-flame-based modeling was first introduced in the context of Reynolds Average Navier Stokes (RANS) of premixed turbulent combustion [15] and features similarities to diffusionflamelet modeling [16], developed for nonpremixed turbulent flames. Bradley et al [17] have thoroughly studied flamelet behavior in RANS premixed turbulent combustion (e.g., strain rate effects and quenching) over a wide range of parameters to offer a real test for the whole RANS modeling approach.…”

Premixed and nonpremixed generated manifolds in large-eddy simulation of Sandia flame D and F

“…Although Pierce and Moin [6] used nonpremixed flamelets only, the mixture fraction/progress variable approach can be based on premixed flamelets as well [7][8][9][10][11]. In contrast, the mixture fraction/scalar dissipation rate approach cannot be based on premixed flamelets, since premixed flamelets have a scalar dissipation rate of zero.…”

Tabulation of complex chemistry based on self-similar behavior of laminar premixed flames

“…To overcome this limitation, two similar approaches, called "flame prolongation of ILDM" (FPI) [10] and "flamelet generated manifold" (FGM) [11], have been independently devised. These techniques, first introduced by Bradley et al [12], generate look-up tables from simulations of one-dimensional laminar premixed flames using complex chemical schemes. Reaction rates and species mass fractions are then tabulated as functions of a limited set of coordinates (progress variable, mixture fraction or equivalence ratio, enthalpy, etc.).…”