Subgrid Scale Modeling in Large-Eddy Simulation of Turbulent Combustion Using Premixed Flamelet Chemistry

Vreman, A.W.; Oijen, J.A. van; Goey, de Lph Philip; Bastiaans, Rjm Rob

doi:10.1007/s10494-008-9159-x

Cited by 70 publications

(78 citation statements)

References 40 publications

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“…The configuration of the premixed stoichiometric methane-air Bunsen flame simulated was a spatial planar jet of the unburnt mixture (mean centerline velocity U 0 = 3 m/s and T = 298 K), surrounded by a co-flow with hot products (velocity 7 m/s and T = 2240 K). The slot width of the burner equalled 8 mm, different from otherwise similar experiments [9] and simulations [10,16].…”

Section: Flow Conditionsmentioning

confidence: 79%

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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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Section: Flow Conditionsmentioning

confidence: 79%

“…In more detail the algorithm that is used to update the variables from level n to n + 1 consists of five steps, listed first in Ref. [16] and reproduced below for clarity.…”

Section: Numericsmentioning

confidence: 99%

A Similarity Subgrid Model for Premixed Turbulent Combustion

Vreman

Bastiaans

Geurts

2008

Flow Turbulence Combust

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“…Locally a variable is described by a Probability Density Function (PDF) defining the probability of occurrence of a certain state. This is therefore accounted for progress variable and mixture fraction by convolution of the laminar database using a β -function shaped PDF [7]. The β -pdf shape has the advantage of including singularities near the end points while being simple to compute.…”

Section: Flamelet Generated Manifolds -Five Dimensional Implementationmentioning

confidence: 99%

“…Reuse of AIP content is subject to the terms at: http://scitation. variance of mixture fraction Z 2 a suitable, and often used, model is the gradient-based model as described in [7,2]:…”

Section: -2mentioning

confidence: 99%

A five dimensional implementation of the flamelet generated manifolds technique for gas turbine application

Donini¹,

Bastiaans²,

Oijen³

et al. 2015

AIP Conference Proceedings

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, de, L. P. H. (2015). A five dimensional implementation of the flamelet generated manifolds technique for gas turbine application. AIP Conference Proceedings, 1648, 030012-1/5. DOI: 10.1063/1.4912329 General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Abstract. In the present paper the Flamelet-Generated Manifold (FGM) chemistry reduction method is implemented and extended for the inclusion of all the features that are typically observed in stationary gas-turbine combustion. These consist of stratification effects, heat loss and turbulence. The latter is included by coupling FGM with the Reynolds Averaged Navier Stokes (RANS) model. Three control variables are included for the chemistry representation: the reaction evolution is described by the reaction progress variable, the heat loss is described by the enthalpy and the stratification effect is expressed by the mixture fraction. The interaction between chemistry and turbulence is considered through a presumed probability density function (PDF) approach, which is considered for progress variable and mixture fraction. This results in two extra control variables: progress variable variance and mixture fraction variance. The resulting manifold is five-dimensional, in which the dimensions are progress variable, enthalpy, mixture fraction, progress variable variance and mixture fraction variance. In addition, a highly turbulent and swirling flame in a gas turbine model combustor is computed, in order to test the 5-D FGM implementation. The use of FGM as a combustion model shows that combustion features at gas turbine conditions can be satisfactorily reproduced with a reasonable computational effort. The implemented combustion model retains most of the physical accuracy of a detailed simulation while drastically reducing its computational time, paving the way for new developments of alternative fuel usage in a cleaner and more efficient combustion.

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“…Cooperative experimental research on benchmark flame types through Turbulent Nonpremixed Flame (TNF) Workshops [4] has provided sorely needed validation data of novel phenomenological models [5][6][7][8][9] and high-fidelity numerical simulations [10][11][12][13][14]. Of particular relevance are in-situ measurements of temperature, major species, and mixture fraction obtained from point or lineimaged spontaneous Raman scattering of an incident high energy laser pulse .…”

Section: Introductionmentioning

confidence: 99%

Development of a Raman spectroscopy technique to detect alternate transportation fuel hydrocarbon intermediates in complex combustion environments.

Ekoto¹

2012

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Spontaneous Raman spectra for important hydrocarbon fuels and combustion intermediates were recorded over a range of low-to-moderate flame temperatures using the multiscalar measurement facility located at Sandia/CA. Recorded spectra were extrapolated to higher flame temperatures and then converted into empirical spectral libraries that can readily be incorporated into existing post-processing analysis models that account for crosstalk from overlapping hydrocarbon channel signal. Performance testing of the developed libraries and reduction methods was conducted through an examination of results from well-characterized laminar reference flames, and was found to provide good agreement. The diagnostic development allows for temporally and spatially resolved flame measurements of speciated hydrocarbon concentrations whose parent is more chemically complex than methane. Such data are needed to validate increasingly complex flame simulations.4

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Subgrid Scale Modeling in Large-Eddy Simulation of Turbulent Combustion Using Premixed Flamelet Chemistry

Cited by 70 publications

References 40 publications

A Similarity Subgrid Model for Premixed Turbulent Combustion

A Similarity Subgrid Model for Premixed Turbulent Combustion

A five dimensional implementation of the flamelet generated manifolds technique for gas turbine application

Development of a Raman spectroscopy technique to detect alternate transportation fuel hydrocarbon intermediates in complex combustion environments.

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