Survey of Turbulent Combustion Models for Large-Eddy Simulations of Propulsive Flowfields

AIAA Journal ◽  
2016 ◽  
Vol 54 (10) ◽  
pp. 2930-2946 ◽  
Author(s):  
Richard S. Miller ◽  
Justin W. Foster
Keyword(s):  
Turbulent Combustion ◽  
Large Eddy Simulations ◽  
Combustion Models ◽  
Large Eddy

Mixing Models for Large-Eddy Simulation of Nonpremixed Turbulent Combustion

2000 ◽  
Vol 123 (2) ◽  
pp. 341-346 ◽  
Author(s):  
S. M. deBruynKops ◽  
J. J. Riley
Keyword(s):  
Turbulent Combustion ◽  
Dissipation Rate ◽  
Mixture Fraction ◽  
Reaction Rates ◽  
Large Eddy Simulations ◽  
Scalar Dissipation ◽  
Mixing Models ◽  
Mixing Rate ◽  
Flamelet Model ◽  
Large Eddy

The application of mixture fraction based models to large-eddy simulations (LES) of nonpremixed turbulent combustion requires information about mixing at length scales not resolved on the LES grid. For instance, the large-eddy laminar flamelet model (LELFM) takes the subgrid-scale variance and the filtered dissipation rate of the mixture fraction as inputs. Since chemical reaction rates in nonpremixed turbulence are largely governed by the mixing rate, accurate mixing models are required if mixture fraction methods are to be successfully used to predict species concentrations in large-eddy simulations. In this paper, several models for the SGS scalar variance and the filtered scalar dissipation rate are systematically evaluated a priori using benchmark data from a DNS in homogeneous, isotropic, isothermal turbulence. The mixing models are also evaluated a posteriori by applying them to actual LES data of the same flow. Predictions from the models that depend on an assumed form for the scalar energy spectrum are very good for the flow considered, and are better than those from models that rely on other assumptions.

Coupled large eddy simulations of turbulent combustion and radiative heat transfer

2008 ◽  
Vol 152 (3) ◽  
pp. 387-400 ◽  
Author(s):  
R. Gonçalves dos Santos ◽  
M. Lecanu ◽  
S. Ducruix ◽  
O. Gicquel ◽  
E. Iacona ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Radiative Heat Transfer ◽  
Turbulent Combustion ◽  
Radiative Heat ◽  
Large Eddy Simulations ◽  
Large Eddy
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