Survey of Turbulent Combustion Models for Large-Eddy Simulations of Propulsive Flowfields

Miller, Richard S.; Foster, Justin

doi:10.2514/1.j054740

Cited by 26 publications

(5 citation statements)

References 203 publications

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“…Further discussion of these challenges for turbulent-combustion models is provided elsewhere. [15][16][17][18][19] Considering that extinction-reignition problems pose a di cult modeling challenge, the present work uses two reacting temporal jets to assess the predictive capabilities of Large Eddy Simulations (LES). This assessment is conducted by taking the point of view of a user by following the next guidelines.…”

mentioning

confidence: 99%

Effect of the turbulence modeling in large-eddy simulations of nonpremixed flames undergoing extinction and reignition

Gonzalez-Juez

Dasgupta

Arshad

et al. 2017

55th AIAA Aerospace Sciences Meeting

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Simulating practical combustion systems requires the approximation of the interaction between turbulence, molecular transport and chemical reactions. Turbulent combustion models are used for this purpose, but their behavior is di cult to anticipate based on their mathematical formulations, making the use of numerical experimentation necessary. Therefore, the present work explores the e↵ect of three turbulent-combustion models, two eddy-viscosity models, and their parameters on a combustion problem which is notoriously di cult to model: flame extinction and reignition. For this purpose, two types of temporal jets are considered, and direct-numerical-simulation results are compared qualitatively with those from large-eddy simulations. I. IntroductionCombustion devices such as piston engines, gas-turbine engines, afterburners, and furnaces operate in a turbulent-combustion mode, as opposed to laminar combustion. 1, 2 Turbulent combustion involves an interaction between chemical reactions, micromixing (molecular mixing), and turbulence that spans a broad range in spatiotemporal space. As a result, the full resolution of these physics with Direct Numerical Simulations (DNS) is currently computationally a↵ordable only for the simplest type of problems. Practical problems need to be simulated with mathematical formulations that approximate the above physics. These formulations are called turbulent-combustion models. Being models themselves, careful comparisons of their predictions with experiments or DNS is necessary, a topic which has a vast literature. 2-5 Nonetheless, there still remains various physics which have proven to be particularly di cult to model.The onset of flame blowout is a dangerous operating condition. It involves extinction and reignition, 6 both of which pose a di cult modeling challenge. To start with, convenient modeling assumptions about the rate controlling mechanism (mixing-controlled or reaction-controlled) no longer apply. Another di culty is the fact that some reignition mechanisms involve a distributed-reaction-like regime 7, 8 or a partially-premixed combustion mode. 9, 10 Therefore, for example, flamelet or conditional-moment-closure models designed exclusively for either premixed or nonpremixed combustion are not applicable, but may need to be modified to account for partially-premixed combustion, a task that has been conducted for flamelets. 11 Another challenge in modeling extinction and reignition is that molecular di↵usion plays a key role; not surprisingly, simulations of extinction and reignition with transported PDF (TPDF) methods, where micromixing is modeled, not resolved, are very sensitive to the type of micromixing model. 12 This type of model-parameter sensitivity is not restricted to TPDF. Moreover, some flames undergoing extinction and reignition exhibit PDFs of temperature with two peaks (i.e. not monomodal PDFs), 13, 14 a feature that cannot be captured ⇤ Senior Engineer, esteban@fastmail.us, AIAA Member.

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mentioning

confidence: 99%

Effect of the turbulence modeling in large-eddy simulations of nonpremixed flames undergoing extinction and reignition

Gonzalez-Juez

Dasgupta

Arshad

et al. 2017

55th AIAA Aerospace Sciences Meeting

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“…116 This is also reflected in the number of tutorials and survey articles devoted to the subject. Just within the last decade, detailed review articles have been provided by Givi, 117 Haworth, 100 Pope, 97 Yilmaz et al, 118 Ren et al, 119 Miller and Foster, 120 and Sammak et al 121 Because of its demonstrated capabilities, the fdf is now being covered in text books 96,122 and is being steadily built into commercial software and packages. As examples of computer codes currently in use are the ANSYS Fluent, 123,124 the Siemens 125 in Zhang and Haworth, 126 the OpenFoam 127 in Mokhtarpoor et al, 128 Turkeri et al, 129,130 Galindo-Lopez et al 131 and Zhao et al, 132 and most recently the Nektarþþ spectral/hp element 133,134 by Sammak et al 135 and in AMRex code 136 by Aitzhan.…”

Section: Filtered Density Function (Fdf)mentioning

confidence: 99%

Edward E. O'Brien contributions to reactive-flow turbulence

2021

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Professor Edward Ephraim O'Brien ("Ted") has made lasting contributions to the theory and modeling of scalar mixing and reaction in turbulent flows. With a doctoral dissertation at The Johns Hopkins University in 1960, entitled "On the Statistical Behavior of a Dilute Reactant in Isotropic Turbulence," supervised by the legend Stanley Corrsin, and in the company of notable pioneer of turbulence, John Leask Lumley, Ted's academic training propelled him through a prolific career. In the opening article of this Special Issue, we provide a review of some of Ted's contributions. First, a summary is presented of his work on the examination of the failure of the cumulant discard approximation for the scalar mixing. This is followed by a highlight of his impacts on other spectral theories of turbulence including Kraichnan's direct interaction approximation. His contributions to more modern theoretical/computational description of reactive turbulence are discussed next, including the transported probability density function (pdf) formulation, scalar-gradient pdf transport equation, scalar interfaces, and the filtered density function. Finally, some of his research on Direct Numerical Simulation of compressible turbulence is reviewed.

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“…F-TACLES has been applied to complex gaseous turbulent flames such as stratified [14] and nonadiabatic [15,16] configurations. However, constrained by severe assumption of a low-dimensional manifold reduction, the suitability of such LES-flamelet approach for two-phase reactive flows remains to be demonstrated [17].…”

Section: Introductionmentioning

confidence: 99%

Large Eddy Simulation of a Turbulent Spray Jet Flame Using Filtered Tabulated Chemistry

Chatelier

Fiorina

Moureau

et al. 2020

Journal of Combustion

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This work presents Large Eddy Simulations of the unconfined CORIA Rouen Spray Burner, fed with liquid n-heptane and air. Turbulent combustion modeling is based on the Filtered TAbulated Chemistry model for LES (F-TACLES) formalism, designed to capture the propagation speed of turbulent stratified flames. Initially dedicated to gaseous combustion, the filtered flamelet model is challenged for the first time in a turbulent spray flame configuration. Two meshes are employed. The finest grid, where both flame thickness and wrinkling are resolved, aims to challenge the chemistry tabulation procedure. At the opposite the coarse mesh does not allow full resolution of the flame thickness and exhibits significant unresolved contributions of subgrid scale flame wrinkling. Both LES solutions are extensively compared against experimental data. For both nonreacting and reacting conditions, the flow and spray aerodynamical properties are well captured by the two simulations. More interesting, the LES predicts accurately the flame lift-off height for both fine and coarse grid conditions. It confirms that the modeling methodology is able to capture the filtered turbulent flame propagation speed in a two-phase flow environment and within grid conditions representative of practical applications. Differences, observed for the droplet temperature, seem related to the evaporation model assumptions.

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Survey of Turbulent Combustion Models for Large-Eddy Simulations of Propulsive Flowfields

Cited by 26 publications

References 203 publications

Effect of the turbulence modeling in large-eddy simulations of nonpremixed flames undergoing extinction and reignition

Effect of the turbulence modeling in large-eddy simulations of nonpremixed flames undergoing extinction and reignition

Edward E. O'Brien contributions to reactive-flow turbulence

Large Eddy Simulation of a Turbulent Spray Jet Flame Using Filtered Tabulated Chemistry

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