Large eddy simulation of a premixed propane turbulent bluff body flame using the Eulerian stochastic field method

Jones, W.P.; Marquis, A. J.; Wang, F.

doi:10.1016/j.fuel.2014.06.050

Cited by 58 publications

(22 citation statements)

References 28 publications

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“…In general, reasonable consistency for these different approaches was found in the present study as well as satisfactory agreement between the present simulations and measurements. The most accurate results were obtained using the large-eddy simulations, which revealed that the LES-EDC closure is capable to reproduce with satisfactory agreement the unsteady combustion physics of the lean premixed bluff-body flame specific to the Volvo test rig both qualitatively and quantitatively, and were reasonably comparable with some others results available in the literature [5], [26], [36] as well.…”

Section: Discussionsupporting

confidence: 75%

“…Recent numerical results by Jones et al [26] were used to assess the influence of the turbulence-chemistry interaction models for the reacting LES. Jones et al [26] studied the Volvo test rig using LES and a sub-grid scale probability density function (LES-PDF, hereafter) approach in conjunction with the stochastic fields solution method to account for the subgrid scale turbulence-chemistry interactions.…”

Section: Effects Of the Turbulence-chemistry Interactionmentioning

confidence: 99%

“…Jones et al [26] studied the Volvo test rig using LES and a sub-grid scale probability density function (LES-PDF, hereafter) approach in conjunction with the stochastic fields solution method to account for the subgrid scale turbulence-chemistry interactions. Numerical results by Ma et al [36] were added It is worth noticing that Jones et al [26] and Ma et al [36] used the conventional Smagorinsky SGS model with C s = 0.1 for the turbulence closure. Here, the additional LES run (LESR4) using the Smagorinsky SGS model (C s = 0.1) was calculated to investigate the influence of C s .…”

Section: Effects Of the Turbulence-chemistry Interactionmentioning

confidence: 99%

“…Moreover, this case has been extensively used by other researchers to study turbulent premixed combustion (among of them [26], [36], [40], [51]). …”

Section: Introductionmentioning

confidence: 99%

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Reynolds-Averaged, Scale-Adaptive and Large-Eddy Simulations of Premixed Bluff-Body Combustion Using the Eddy Dissipation Concept

Lysenko¹,

Ertesvåg

2017

Flow Turbulence Combust

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A lean premixed propane/air bluff-body stabilized flame (Volvo test rig) is calculated using the Scale-Adaptive Simulation turbulence model (SAS) and Large-Eddy simulations (LES) as well as the conventional Reynoldsaveraged approach (RAS). RAS and SAS are closed by the standard k-ǫ and the k-ω Shear Stress Transport (SST) turbulence models, respectively. The conventional Smagorinsky and the k-equation sub-grid scales models are used for the LES closure. Effects of the sub-grid scalar flux modeling using the classical gradient hypothesis and Clark's tensor diffusivity closures both for the inert and reactive LES flows are discussed. The Eddy Dissipation Concept (EDC) is used for the turbulence-chemistry interaction. It assumes that molecular mixing and the subsequent combustion occur in the 'fine structures' (smaller dissipative eddies, which are close to the Kolmogorov scales). Assuming the full turbulence energy cascade, the characteristic length and velocity scales of the 'fine structures' are evaluated using different turbulence models (RAS, SAS and LES). The finite-rate chemical kinetics is taken into account by treating the 'fine structures' as constant pressure and adiabatic homogeneous reactors, calculated as a system of ordinary-differential equations (ODEs) described by a Perfectly Stirred Reactor (PSR) concept. Several further enhancements to model the PSRs are proposed, including a new Livermore Solver (LSODA) for integrating stiff ODEs and a new correction to calculate the PSR time scales. All models have been implemented as a stand-alone application edcPisoFoam based on the OpenFOAM technology. Additionally, several RAS calculations were performed using the Turbulence Flame Speed Closure model in Ansys Fluent to assess effects of the heat losses by modeling the conjugate heat transfer between the bluff-body and the reactive flow. Effects of the turbulence Schmidt number on RAS results are discussed as well. Numerical results are compared with available experimental data. Reasonable consistency between experimental data and numerical results provided by RAS, SAS and LES is observed. In general, there is satisfactory agreement between present LES-EDC simulations, numerical results by other authors and measurements without any major modification to the EDC closure constants, which gives a quite reasonable indication on the adequacy and accuracy of the method and its further application for turbulent premixed combustion simulations.

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Section: Discussionsupporting

confidence: 75%

Section: Effects Of the Turbulence-chemistry Interactionmentioning

confidence: 99%

Section: Effects Of the Turbulence-chemistry Interactionmentioning

confidence: 99%

“…Moreover, this case has been extensively used by other researchers to study turbulent premixed combustion (among of them [26], [36], [40], [51]). …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Reynolds-Averaged, Scale-Adaptive and Large-Eddy Simulations of Premixed Bluff-Body Combustion Using the Eddy Dissipation Concept

Lysenko¹,

Ertesvåg

2017

Flow Turbulence Combust

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“…Previous Stochastic Fields LES studies [5][6][7][8][9] have set the filter length scale equal to the grid spacing (or the cube root of the cell volume). When the filter length scale depends on the grid spacing, the effects of numerical resolution errors cannot be distinguished from scale-dependence of the sub-grid modelling.…”

Section: Numerical Resolution Of the Stochastic Fields Equation In Prmentioning

confidence: 99%

Resolution Requirements in Stochastic Field Simulation of Turbulent Premixed Flames

Picciani

Richardson

Navarro‐Martinez

2018

Flow Turbulence Combust

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The spatial resolution requirements of the Stochastic Fields probability density function approach are investigated in the context of turbulent premixed combustion simulation. The Stochastic Fields approach is an attractive way to implement a transported Probability Density Function modelling framework into Large Eddy Simulations of turbulent combustion. In premixed combustion LES, the numerical grid should resolve flame-like structures that arise from solution of the Stochastic Fields equation. Through analysis of Stochastic Fields simulations of a freely-propagating planar turbulent premixed flame, it is shown that the flame-like structures in the Stochastic Fields simulations can be orders of magnitude narrower than the LES filter length scale. The under-resolution is worst for low Karlovitz number combustion, where the thickness of the Stochastic Fields flame structures is on the order of the laminar flame thickness. The effect of resolution on LES predictions is then assessed by performing LES of a laboratory Bunsen flame and comparing the effect of refining the grid spacing and filter length scale independently. The usual practice of setting the LES filter length scale equal to grid spacing leads to severe under-resolution and numerical thickening of the flame, and to substantial error in the turbulent flame speed. The numerical resolution required for accurate solution of the Stochastic Fields equations is prohibitive for many practical applications involving high-pressure premixed combustion. This motivates development of a Thickened Stochastic Fields approach (Picciani et al. Flow Turbul. Combust. X, YYY (2018) in order to ensure the numerical accuracy of Stochastic Fields simulations.

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Challenges for Large Eddy Simulation of Engineering Flows

Fureby

2016

Whither Turbulence and Big Data in the 21st Century?

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Large eddy simulation of a premixed propane turbulent bluff body flame using the Eulerian stochastic field method

Cited by 58 publications

References 28 publications

Reynolds-Averaged, Scale-Adaptive and Large-Eddy Simulations of Premixed Bluff-Body Combustion Using the Eddy Dissipation Concept

Reynolds-Averaged, Scale-Adaptive and Large-Eddy Simulations of Premixed Bluff-Body Combustion Using the Eddy Dissipation Concept

Resolution Requirements in Stochastic Field Simulation of Turbulent Premixed Flames

Challenges for Large Eddy Simulation of Engineering Flows

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