The influence of a thermally active wall on premixed turbulent combustion

2003 ◽  
Vol 175 (11) ◽  
pp. 2015-2060 ◽  
Author(s):  
Michel Champion ◽  
Paul A. Libby
Keyword(s):  
Turbulent Combustion ◽  
Premixed Turbulent Combustion

Premixed, turbulent combustion of a sudden-expansion flow

1983 ◽  
Vol 50 ◽  
pp. 153-165 ◽  
Author(s):  
Y.El Banhawy ◽  
S. Sivasegaram ◽  
J.H. Whitelaw
Keyword(s):  
Turbulent Combustion ◽  
Sudden Expansion ◽  
Premixed Turbulent Combustion

scholarly journals A Similarity Subgrid Model for Premixed Turbulent Combustion

2008 ◽  
Vol 82 (2) ◽  
pp. 233-248 ◽  
Author(s):  
A. W. Vreman ◽  
R. J. M. Bastiaans ◽  
B. J. Geurts
Keyword(s):  
Turbulent Combustion ◽  
Premixed Turbulent Combustion ◽  
Subgrid Model

An Efficient Computational Model for Premixed Turbulent Combustion at High Reynolds Numbers Based on a Turbulent Flame Speed Closure

1997 ◽  
Author(s):  
Vladimir Zimont ◽  
Wolfgang Polifke ◽  
Marco Bettelini ◽  
Wolfgang Weisenstein
Keyword(s):  
Computational Model ◽  
Transport Equation ◽  
Turbulent Combustion ◽  
Turbulent Flame ◽  
Reynolds Numbers ◽  
Flame Speed ◽  
Closed Form Expression ◽  
Turbulent Length Scale ◽  
Premixed Turbulent Combustion ◽  
Turbulent Flame Speed

Theoretical background, details of implementation and validation results of a computational model for turbulent premixed gaseous combustion at high turbulent Reynolds numbers are presented. The model describes the combustion process in terms of a single transport equation for a progress variable; closure of the progress variable’s source term is based on a model for the turbulent flame speed. The latter is identified as a parameter of prime significance in premixed turbulent combustion and is determined from theoretical considerations and scaling arguments, taking into account physico-chemical properties of the combustible mixture and local turbulent parameters. Specifically, phenomena like thickening, wrinkling and straining of the flame front by the turbulent velocity field are considered, yielding a closed form expression for the turbulent flame speed that involves, e.g., speed, thickness and critical gradient of a laminar flame, local turbulent length scale and fluctuation intensity. This closure approach is very efficient and elegant, as it requires only one transport equation more than the non-reacting flow case, and there is no need for costly evaluation of chemical source terms or integration over probability density functions. The model was implemented in a finite-volume based computational fluid dynamics code and validated against detailed experimental data taken from a large scale atmospheric gas turbine burner test stand. The predictions of the model compare well with the available experimental results. It has been observed that the model is significantly more robust and computationally efficient than other combustion models. This attribute makes the model particularly interesting for applications to large 3D problems in complicated geometries.

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