Large Eddy Simulation of the Sandia Flame Series (D–F) using the Eulerian stochastic field method

Three turbulent piloted methane jet flames with increasing levels of local extinction (Sandia Flames D–F) have been computed using Large Eddy Simulation. The smallest unresolved scales of the flow, in which combustion occurs, are represented using the filtered probability density function method whe...

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Bibliographic Details
Published in:Combustion and flame 2010-09, Vol.157 (9), p.1621-1636
Main Authors: Jones, W.P., Prasad, V.N.
Format: Article
Language:English
Subjects:
AIR
Applied sciences
APPROXIMATIONS
COMBUSTION
Combustion. Flame
DIFFUSION
Energy
Energy. Thermal use of fuels
EQUATIONS
EVOLUTION
Exact sciences and technology
Extinction
FLAME EXTINCTION
FLAMES
IGNITION
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
JETS
Joint pdf
LARGE-EDDY SIMULATION
Mathematical analysis
MATHEMATICAL MODELS
METHANE
Methane–air flame
PROBABILITY DENSITY FUNCTIONS
SCALARS
Scale (corrosion)
Stochastic field method
STOCHASTIC PROCESSES
STRESSES
Theoretical studies. Data and constants. Metering
TURBULENCE
Turbulent flames
Turbulent flow
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Summary:Three turbulent piloted methane jet flames with increasing levels of local extinction (Sandia Flames D–F) have been computed using Large Eddy Simulation. The smallest unresolved scales of the flow, in which combustion occurs, are represented using the filtered probability density function method where the corresponding evolution equation is solved directly. A dynamic model for the sub-grid stresses together with a simple gradient diffusion approximation for the scalar fluxes is applied in conjunction with the linear mean square estimation closure for sub-filter scale mixing. An augmented reduced mechanism (ARM) derived from the full GRI 3.0 mechanism is incorporated to describe the chemical reaction. The results demonstrate the ability of the method in capturing quantitatively finite rate effects such as extinction and re-ignition in turbulent flames.
ISSN:0010-2180
1556-2921
DOI:10.1016/j.combustflame.2010.05.010