Modelling of premixed counterflow flames using the flamelet-generated manifold method

Oijen, van Ja Jeroen; Goey, de Lph Philip

doi:10.1088/1364-7830/6/3/305

Cited by 156 publications

(87 citation statements)

References 13 publications

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“…CO 2 present a more erratic behaviour with good results in flame F3 but under-prediction at F1 and F2. CO is over-predicted (Figs,14,16 and 18) in all three flames and is difficult to establish a trend with increased N. It has been suggested [24] that the over-prediction of CO can explain the under-prediction of CO 2 suggesting a slower oxidation rate in the CO to CO 2 reaction. However different researchers [24,25] reported the same discrepancies with experimental data (much larger than 10-25% experimental uncertainties) using different chemical mechanisms.…”

Section: Sensitivity Analysis: Statistical Convergencementioning

confidence: 91%

“…All these methods have common characteristics as they all look for a closure of the turbulent flame speed through the FSD equation and they are restricted to the premixed regime, in most cases away from the broken reaction zones. Other premixed-specific approaches found in the literature include variants of the flamelet concept typical of non-premixed flames; the flamelet generated manifold method (FGM) [16], application of the similarity model [17] and the broadened flame model [18] among others. A complete review of LES models for premixed combustion is outside the scope of this paper, and the reader is referred to the literature [19].…”

Section: Introductionmentioning

confidence: 99%

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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: Sensitivity Analysis: Statistical Convergencementioning

confidence: 91%

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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“…Therefore, it is common to apply a reduction technique to limit the number of transport equations that need to be carried in three dimensions. One group of reduction techniques is formed by the flamelet approaches [1][2][3][4][5][6]. In flamelet approaches, results from one-dimensional computations with detailed chemistry (flamelets) are mapped to one or a few representative variables.…”

Section: Introductionmentioning

confidence: 99%

A Similarity Subgrid Model for Premixed Turbulent Combustion

Vreman

Bastiaans

Geurts

2008

Flow Turbulence Combust

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The accuracy of large-eddy simulation (LES) of a turbulent premixed Bunsen flame is investigated in this paper. To distinguish between discretization and modeling errors, multiple LES, using different grid sizes h but the same filterwidth , are compared with the direct numerical simulation (DNS). In addition, LES using various values of but the same ratio / h are compared. The chemistry in the LES and DNS is parametrized with the standard steady premixed flamelet for stochiometric methane-air combustion. The subgrid terms are closed with an eddyviscosity or eddy-diffusivity approach, with an exception of the dominant subgrid term, which is the subgrid part of the chemical source term. The latter subgrid contribution is modeled by a similarity model based upon 2 , which is found to be superior to such a model based upon . Using the 2 similarity model for the subgrid chemistry the LES produces good results, certainly in view of the fact that the LES is completely wrong if the subgrid chemistry model is omitted. The grid refinements of the LES show that the results for = h do depend on the numerical scheme, much more than for h = /2 and h = /4. Nevertheless, modeling errors and discretization error may partially cancel each other; occasionally the = h results were more accurate than the h ≤ results. Finally, for this flame LES results obtained with the present similarity model are shown to be slightly better than those obtained with standard β-pdf closure for the subgrid chemistry.

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“…For that reason, by now, there are a number of ''tricks'' which make the implementation of the ILDM technique possible. Examples are fake state space relations in the domain where the ILDM does not exist, or flamelet prolongation of the ILDM [21]. In the following we suggest an algorithm which overcomes these drawbacks in general case.…”

Section: Introductionmentioning

confidence: 99%

Extension of the ILDM method to the domain of slow chemistry

Bykov

Maas

2007

Proceedings of the Combustion Institute

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This work focuses on the construction of reduced kinetic models and the use of these models for the simulation of combustion processes governed by strongly coupled thermo-chemical and convection/diffusion sub-processes. The ILDM method is used to reduce the system dynamics in the composition space to lower dimensional manifolds. This manifold approximates an invariant system manifold of slow motions. A modification of the ILDM approach based on a special system representation is suggested, which allows to use an ILDM of low dimension even in cases where the standard formulation would require a high dimension. In this way difficulties of generating relatively high dimensional ILDMs are overcome. The approach allows a more accurate description of coupled thermo-chemical and transport sub-processes. When the processes are split a method of extension of the ILDM manifold to cover all the domain of interest in the full state space is suggested. It is based on the assumption of slow chemistry inside the low-temperature zone of the flame. To verify the approach 1D stationary free flat laminar flames are investigated. It is shown that the approximation allows a representation of the full system dynamics governed by detailed chemical kinetics and molecular transport.

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Modelling of premixed counterflow flames using the flamelet-generated manifold method

Cited by 156 publications

References 13 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

A Similarity Subgrid Model for Premixed Turbulent Combustion

Extension of the ILDM method to the domain of slow chemistry

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