Simulation of methane/air non-premixed turbulent flames based on REDIM simplified chemistry

Minuzzi, Felipe; Yu, Chunkan; Maas, Ulrich

doi:10.1007/s10494-019-00059-3

Cited by 5 publications

(5 citation statements)

References 41 publications

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“…9 that the temperature is over predicted for x/D > 45, a difference justified by the radiation heat loss. Other methods, such as probability density functions (PDF) can also be used to improve this result [56].…”

Section: Turbulent Casementioning

confidence: 99%

“…We also compare in Figs. 9 and 10 the results of the skeletal mechanism against a numerical simulation using the chemistry modeling technique REDIM, that was used to simulate the Sandia Flame D using a RANS/transported PDF framework [56]. Unlike the DRG, the REDIM uses the thermodynamic and transport information of the detailed system to obtain a low-dimensional manifold imbedded in the state space that can be used to describe the full dynamics of the system.…”

Section: Turbulent Casementioning

confidence: 99%

“…Unlike the DRG, the REDIM uses the thermodynamic and transport information of the detailed system to obtain a low-dimensional manifold imbedded in the state space that can be used to describe the full dynamics of the system. A full explanation of implementation can be found in [56].…”

Section: Turbulent Casementioning

confidence: 99%

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Numerical Simulation of Laminar and Turbulent Methane/Air Flames Based on a DRG-Derived Skeletal Mechanism

Minuzzi

Maas

2020

Eurasian Chem. Tech. J.

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Simulation of turbulent flames using detailed chemical mechanisms is still a challenge in numerical combustion due to the large number of species and the stiffness of the system of governing equations. In this sense, strategies to reduce the size of the detailed model are necessary and one of such models is the well-known directed relation graph (DRG) method. In the present work, a DRG-derived skeletal mechanism developed using only one application for methane/ air simulations is presented and validated for auto-ignition times, laminar flame speed and counterflow flames. The skeletal mechanism is tested for varying the equivalence ratio (ϕ = 0.4, to 3) and pressure (p = 1 to 150 atm). The temperature spans the range from T = 1000 K to T = 2000 K. The relative error, compared with the detailed mechanism, of our proposed model for ignition delay times and flame speed are less than 10% for most of the parameters. The skeletal mechanism is also used to simulate the piloted turbulent jet Sandia Flame D. Results show that this skeletal mechanism can reproduce the main features of laminar and turbulent methane/air flames.

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Section: Turbulent Casementioning

confidence: 99%

Section: Turbulent Casementioning

confidence: 99%

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Numerical Simulation of Laminar and Turbulent Methane/Air Flames Based on a DRG-Derived Skeletal Mechanism

Minuzzi

Maas

2020

Eurasian Chem. Tech. J.

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“…Besides this, the REDIM has been successfully applied for flame–wall interaction problems including a detailed transport model and surface reactions for methane, for DME, and for iso-octane . Additionally, the REDIM has also been shown to be an efficient tool for reduced chemistry in the simulation of turbulent flames. − …”

Section: Introductionmentioning

confidence: 99%

“…As suggested in our previous studies, ,, the flamelet approach can be used to specify a gradient estimate. Although only few stationary flame solutions are necessary for the gradient estimate and the generated REDIM can be used for laminar and turbulent simulations, , one might ask which and how many stationary solutions are indeed required or in other words, “Is it possible to generate a REDIM with minimal information?” In fact, it is desired to generate a REDIM without or with only few exact solutions. Furthermore, the generation of the REDIM model should be generally automatic for any combustion system.…”

Section: Introductionmentioning

confidence: 99%

Automatic Construction of REDIM Reduced Chemistry with a Detailed Transport and Its Application to CH₄ Counterflow Flames

et al. 2020

Energy Fuels

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Extinction limits are important quantities of counterflow diffusion flames. An accurate prediction of extinction limits is necessary for the design of engineering combustion devices involving flame quenching. In this work, the reaction−diffusion manifold (REDIM) reduced chemistry with a detailed transport model is applied for the numerical investigation of extinction limits of counterflow diffusion flames. Unlike other tabulated flamelet models where very detailed information about a particular combustion system is required, the REDIM reduced chemistry can be generated based on the detailed reaction mechanisms, requiring only a minimal additional knowledge of the considered combustion system. Recently, an automatic generation of the REDIM has been introduced and tested for premixed flames. This newly developed algorithm starts with a 1D reduced model, and any higher dimension of the REDIM reduced model can be constructed automatically without any additional information. Such an algorithm largely simplifies the generation of the REDIM reduced chemistry. The focus of this work is to apply this newly developed algorithm for the construction of two-dimensional (2D) and three-dimensional (3D) REDIMs for counterflow diffusion flames. It is shown how 2D and 3D REDIM reduced chemistry can be generated automatically in a generic way according to a hierarchical concept. An oxygen-enriched MILD combustion system CH 4 /CO 2 versus the O 2 /CO 2 counterflow diffusion flame, whose extinction strain rates had been measured experimentally, is selected as an illustrative example for discussion and validation. The relative errors of predicted extinction strain rates using a 3D REDIM are much less than the experimental uncertainty and the differences using different detailed chemical mechanisms.

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Reaction diffusion manifolds (REDIMs) applied to soot formation in ethylene counterflow non-premixed flames: an uncoupled methodology

Minuzzi

2022

Comp. Appl. Math.

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Simulation of methane/air non-premixed turbulent flames based on REDIM simplified chemistry

Cited by 5 publications

References 41 publications

Numerical Simulation of Laminar and Turbulent Methane/Air Flames Based on a DRG-Derived Skeletal Mechanism

Numerical Simulation of Laminar and Turbulent Methane/Air Flames Based on a DRG-Derived Skeletal Mechanism

Automatic Construction of REDIM Reduced Chemistry with a Detailed Transport and Its Application to CH₄ Counterflow Flames

Reaction diffusion manifolds (REDIMs) applied to soot formation in ethylene counterflow non-premixed flames: an uncoupled methodology

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Simulation of methane/air non-premixed turbulent flames based on REDIM simplified chemistry

Cited by 5 publications

References 41 publications

Numerical Simulation of Laminar and Turbulent Methane/Air Flames Based on a DRG-Derived Skeletal Mechanism

Numerical Simulation of Laminar and Turbulent Methane/Air Flames Based on a DRG-Derived Skeletal Mechanism

Automatic Construction of REDIM Reduced Chemistry with a Detailed Transport and Its Application to CH4 Counterflow Flames

Reaction diffusion manifolds (REDIMs) applied to soot formation in ethylene counterflow non-premixed flames: an uncoupled methodology

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Automatic Construction of REDIM Reduced Chemistry with a Detailed Transport and Its Application to CH₄ Counterflow Flames