Groth, Clinton P. T: et Binato, Stefano.
2025.
« Large-eddy simulation of turbulent premixed hydrogen-air Bunsen flames using PCM-FPI combustion model ».
In Proceedings of the CSME-CFDSC-CSR 2025 International Congress (Montreal, QC, Canada, May 25-28, 2025)
Coll. « Progress in Canadian Mechanical Engineering », vol. 8.
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Résumé
Hydrocarbon fueled combustion offers an effective pathway to reducing harmful green-house gas emissions associated with carbon dioxide. Nevertheless, diffusion effects are known to be important in turbulent premixed flames involving hydrogen as a fuel, and the ability to predict these effects accurately will be fundamental to arriving at effective numerical combustion models needed for hydrogen flames. For perfectly premixed flames, the further away from the preferential diffusion neutral condition with an equivalence ratio, ?, of ?=1.8, the stronger its effects. In addition, diffusive thermal effect, for which the neutral condition is located at around ? = 0.8 manifest their contribution too. In this study, Large Eddy Simulation (LES) of turbulent premixed hydrogen-air flames is considered using the so-called Presumed Conditional Moment Flame Prolongation of Intrinsic low-dimensional manifold (PCM FPI) combustion model for a number of flames around the neutral condition towards both the lean and rich limits. Premixed Bunsen type flames with equivalent ratios in the range 0.8 ? ? ? 3.57 and for Reynolds numbers of Re = 20,000 and 40,000 are examined and the LES predictions are compared to available experimental data from previous studies. The comparisons illustrate the mutual influence of turbulence and diffusion phenomena on the turbulent f lame structure, burning rate, and flame height. In the lean limit with unstable diffusion conditions, overprediction of flame height and underprediction of turbulent burning rate are observed. Furthermore, the contribution of the instabilities on flame wrinkling decreases with turbulence intensity leading to reductions in these predicted errors. The opposite is true in the rich limit.
| Type de document: | Compte rendu de conférence |
|---|---|
| Éditeurs: | Éditeurs ORCID Hof, Lucas A. NON SPÉCIFIÉ Di Labbio, Giuseppe NON SPÉCIFIÉ Tahan, Antoine NON SPÉCIFIÉ Sanjosé, Marlène NON SPÉCIFIÉ Lalonde, Sébastien NON SPÉCIFIÉ Demarquette, Nicole R. NON SPÉCIFIÉ |
| Date de dépôt: | 18 déc. 2025 15:11 |
| Dernière modification: | 18 déc. 2025 15:11 |
| URI: | https://espace2.etsmtl.ca/id/eprint/32407 |
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