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Non-Premixed Filtered Tabulated Chemistry for LES: Evaluation on Sandia Flames D and E

Obando Vega, Pedro Javier ; Coussement, Axel ; Sadiki, Amsini ; Parente, Alessandro (2022):
Non-Premixed Filtered Tabulated Chemistry for LES: Evaluation on Sandia Flames D and E. (Publisher's Version)
In: Fuels, 3 (3), pp. 486-508. MDPI, e-ISSN 2673-3994,
DOI: 10.26083/tuprints-00022325,
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Item Type: Article
Origin: Secondary publication DeepGreen
Status: Publisher's Version
Title: Non-Premixed Filtered Tabulated Chemistry for LES: Evaluation on Sandia Flames D and E
Language: English
Abstract:

The non-premixed filtered tabulated chemistry for large eddy simulations employs numerical filtering to resolve a thin flame front on practical LES numerical grids. The flame structure is modified to be coherent with the domain discretization. The first turbulent combustion application of the non-premixed filtered tabulated chemistry approach is presented. A keen comparison of the flamelet filtering transformation in the premixed and non-premixed regimes is carried out. Three distinctive features are outlined: the flame thickness variation, the filtered manifold transformation, and the model activation dependence on the chosen diffusion flamelet configuration for a non-premixed filtered approach. The model performance is assessed on two real turbulent flame configurations, Sandia flames D and E, employing a three-dimensional tabulation strategy, where the numerical grid is coupled with the model by the third parameter, i.e., the computational cell size. The repercussions of the above cited aspects are carefully assessed. The results demonstrate that the formalism coupling with an SGS modeling function can adequately describe wrinkled flame front effects. The predictions for both the major stable species and the minor ones accurately correspond with the underlying physics. It turns out that there is a substantial variation of the filter effect as a function of the strain rate of the flame and the considered species. The varying filter sensitivity along the manifold influences the response of the model correction terms and the retrieved variables. The non-premixed FTACLES formalism possibilities and conditions for the model’s utilization and optimal performance are clearly stated, to confirm the idea that SGS closure in diffusive combustion can be derived based on filtering arguments, and not only based on statistical approaches.

Journal or Publication Title: Fuels
Volume of the journal: 3
Issue Number: 3
Place of Publication: Darmstadt
Publisher: MDPI
Uncontrolled Keywords: turbulent non-premixed combustion, Sandia flames D and E, filtered tabulated chemistry for LES
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 16 Department of Mechanical Engineering > Institute for Energy and Power Plant Technology (EKT)
16 Department of Mechanical Engineering > Institute of Reactive Flows and Diagnostics (RSM)
Date Deposited: 12 Sep 2022 13:20
Last Modified: 23 Sep 2022 09:27
DOI: 10.26083/tuprints-00022325
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-223250
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/22325
PPN: 499595033
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