A comparison of flamelet models for premixed turbulent combustion

Journal Article · Fri Oct 01 00:00:00 EDT 1993 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(93)90055-8· OSTI ID:5650802

Duclos, J M; Veynante, D ^[1]; Poinsot, T ^[2]

---

1. CNRS, Paris (France). Lab. EM2C
2. Inst. de Mecanique des Fluides, Toulouse (France)

Five flamelet models for premixed turbulent combustion are described and compared in the case of a one-dimensional turbulent flame propagating in frozen turbulence. This simple configuration allows analytical solution (KPP) to be obtained as devised by Kolmogorov, Petrovski, and Piskunov and performed by Hakberg and Gosman. The explicit solution obtained by this analysis provides the turbulent flame speed as a function of the model parameters and of the turbulence characteristics. These results are compared with experimental data of Abdel-Gayed et al. and with results obtained with the classical eddy break-up model. The realizability of the models is also studied. Recent models based on direct numerical simulation results correctly predict the bending'' of the turbulent burning velocity U[sub [tau]] as a function of the RMS turbulent velocity u[prime] as well as the total quenching of the flame in sufficiently intense turbulence. It is shown that this bending effect may be obtained without taking into account strain effects on the laminar burning velocity. However, no model is able to reproduce all data of Abdel-Gayed and Bradley in a satisfactory way. The reasons for these discrepancies are discussed.

• OSTI ID: 5650802
• Journal Information: Combustion and Flame; (United States), Vol. 95:1-2; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
FLAMES
MATHEMATICAL MODELS
ANALYTICAL SOLUTION
COMBUSTION KINETICS
COMPARATIVE EVALUATIONS
LAMINAR FLOW
ONE-DIMENSIONAL CALCULATIONS
TURBULENT FLOW
CHEMICAL REACTION KINETICS
EVALUATION
FLUID FLOW
KINETICS
REACTION KINETICS
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry