LES of a laboratory-scale turbulent premixed Bunsen flame using FSD, PCM-FPI and thickened flame models

Pérez, Francisco E. Hernández; Yuen, Frank T. C.; Groth, C. P. T.; Gülder, Ömer L.

doi:10.1016/j.proci.2010.06.010

Cited by 74 publications

(67 citation statements)

References 19 publications

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“…Recent trends are to combine several combustion methods to generalize the approach to both combustion regimes. Examples are presumed-PDF/FSD [21] Presumed Conditional Moments/FPI [22] and ATF/FGM [23] Despite its success in other combustion regimes, the application of PDF methods to turbulent premixed flames has been limited. Studies in the RANS-PDF context have revealed that modifications to the micro-mixing term have to be taken into account for accurate predictions [24].…”

Section: Introductionmentioning

confidence: 99%

Large Eddy Simulation of Premixed Turbulent Flames Using the Probability Density Function Approach

Dodoulas

Navarro‐Martinez

2013

Flow Turbulence Combust

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Abstract. In the present study a Large Eddy Simulation and Filtered Density Function model is applied to three premixed piloted turbulent methane flames at different Reynolds Numbers using the Eulerian stochastic fields approach. The model is able to reproduce the flame structure and flow characteristics with a low number of fields (between 4 and 16 fields). The results show a good agreement with experimental data with the same closures employed in non-premixed combustion without any adjustment for combustion regime. The effect of heat release on the flow field is captured correctly. A wide range of sensitivity studies is carried out, including the number of fields, the chemical mechanism, differential diffusion effects and micro-mixing closures. The present work shows that premixed combustion (at least in the conditions under study) can be modelled using LES-PDF methods.. Finally, the ability of the model to predict flame quenching is studied. The model can accurate capture the conditions at which combustion is not sustainable and large pockets of extinction appear.

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Section: Introductionmentioning

confidence: 99%

Large Eddy Simulation of Premixed Turbulent Flames Using the Probability Density Function Approach

Dodoulas

Navarro‐Martinez

2013

Flow Turbulence Combust

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“…The LES framework developed by Herná ndez-Pé rez et al [23,24] is used for performing this study. The framework is now briefly summarized, along with the PCM-FPI combustion model.…”

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confidence: 99%

Large-eddy simulation of lean hydrogen–methane turbulent premixed flames in the methane-dominated regime

Pérez

Groth

Gülder

2014

International Journal of Hydrogen Energy

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“…This is advantageous from the perspective of efficient modelling of the FSD curvature term (S d ∇ · N) s Σ gen as most of the modelling uncertainty is associated with C sg . Moreover, (5a) has also been used for the modelling of (S d ∇ · N) s Σ gen in previous LES simulations [5][6][7]13]. For the present analysis (5a), (i.e.,…”

Section: Mathematical Backgroundmentioning

confidence: 99%

“…The increased affordability of high performance computing has made Large Eddy Simulation (LES) an alternative simulation tool, where the large-scale physical processes are resolved, but modelling is still required for the subgrid quantities. The FSD-based reaction rate closure has recently been successfully extended for the purpose of LES [3][4][5][6][7][8][9][10][11][12][13][14]. In LES simulation of premixed combustion, a Favre-filtered reaction progress variable transport equation is solved alongside other filtered conservation equations.…”

Section: Introductionmentioning

confidence: 99%

“…The reaction progress variable is defined as c = (Y R0 − Y R )/(Y R0 − Y R∞ ), where Y R is the mass fraction of a suitable reactant and the subscripts 0 and ∞ denote the values in the fully unburned and burned gases, respectively. The generalised FSD is defined as Σ gen = |∇c| [3][4][5][6][7][8][9][10][11][12][13][14], where the overbar indicates the LES filtering process. The Favre-filtered reaction progress variable transport equation takes the following form: …”

Section: Introductionmentioning

confidence: 99%

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A PrioriDirect Numerical Simulation Modelling of the Curvature Term of the Flame Surface Density Transport Equation for Nonunity Lewis Number Flames in the Context of Large Eddy Simulations

Katragadda¹,

Chakraborty

2012

International Journal of Chemical Engineering

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A Direct Numerical Simulation (DNS) database of freely propagating statistically planar turbulent premixed flames with Lewis numbers Le ranging from 0.34 to 1.2 has been used to analyse the statistical behaviours of the curvature term of the generalised Flame surface Density (FSD) transport equation, in the context of the Large Eddy Simulation (LES). Lewis number is shown to have significant influences on the statistical behaviours of the resolved and sub-grid parts of the FSD curvature term. It has been found that the existing models for the sub-grid curvature term C sg do not capture the qualitative behaviour of this term extracted from the DNS database for flames with Le << 1. The existing models of C sg only predict negative values, whereas the sub-grid curvature term is shown to assume positive values within the flame brush for the Le = 0.34 and 0.6 flames. Here the sub-grid curvature terms arising from combined reaction and normal diffusion and tangential diffusion components of displacement speed are individually modelled, and the new model of the sub-grid curvature term has been found to capture C sg extracted from DNS data satisfactorily for all the different Lewis number flames considered here for a wide range of filter widths.

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LES of a laboratory-scale turbulent premixed Bunsen flame using FSD, PCM-FPI and thickened flame models

Cited by 74 publications

References 19 publications

Large Eddy Simulation of Premixed Turbulent Flames Using the Probability Density Function Approach

Large Eddy Simulation of Premixed Turbulent Flames Using the Probability Density Function Approach

Large-eddy simulation of lean hydrogen–methane turbulent premixed flames in the methane-dominated regime

A PrioriDirect Numerical Simulation Modelling of the Curvature Term of the Flame Surface Density Transport Equation for Nonunity Lewis Number Flames in the Context of Large Eddy Simulations

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