Controlling the resolved flame thickness of non-premixed flames in LES with filtered tabulated chemistry
Résumé
The use of flamelet-type approaches in Large-Eddy-Simulations (LES) remain popular due to their low CPU cost. Of the many flamelet-type approaches, multi-regime flamelet tabulations have emerged as an attractive solution for capturing partially-premixed flame structures. Two key challenges associated with multi-regime flamelet tabulation are correctly distinguishing between different combustion regimes and the coupling with the LES, where flame structures are unresolved at the mesh scale. The F-TACLES (Filtered tabulated chemistry for LES) model is formally extended to multi-regime combustion by incorporating the partially-premixed tabulation strategy 2PFT. This new F-TACLES model utilises the tabulation coordinates of filtered mixture fraction, filtered progress variable and the resolved scalar dissipation rate of the mixture fraction. A priori tests are undertaken on 1D flames with varying archetypes and finally a 2D triple flame with varying levels of mixture fraction gradients is tested. The multi-regime F-TACLES approach is validated and is shown to outperform mono-archetype F-TACLES models.
Mots clés
- wrote paper
- LES filtered flamelets non-premixed hydrogen turbulent
- LES
- filtered flamelets
- non-premixed
- hydrogen
- turbulent
- filtering
- flamelet approach
- laminar
- Multi-regime
- LES filtered flamelets non-premixed hydrogen turbulent 1 Information for Colloquium Chairs and Cochairs
- LES Performed research
- Multi-regime laminar flamelet approach filtering
- turbulent 1 Information for Colloquium Chairs and Cochairs
- Paris
- IEA
- Tech. rep.
- The future of hydrogen
- wrote paper [1] IEA
- analysed data
- and Reviewers Performed research
- Editors
Domaines
| Origine | Fichiers produits par l'(les) auteur(s) |
|---|---|
| Licence |