Large eddy simulations of weakly turbulent diffusion flames in a co-flow with reduced oxygen concentration
- Author
- Youk Moorthamers (UGent) , Alexander Snegirev (UGent) , Georgios Maragkos (UGent) , Muhammad Jeri At Thabari (UGent) and Bart Merci (UGent)
- Organization
- Project
- Abstract
- A novel sub-grid combustion model (SCM) recently proposed for weakly turbulent buoyant diffusion flames is applied to simulate 10 and 15 kW ethylene-fueled flames produced by a circular porous burner in the oxidizer co-flow with normal and reduced oxygen concentrations. The computational approach enables modeling soot production and radiative emission based on local resolved specie concentrations and temperature, thereby avoiding prescription of the soot yield and global radiative fraction as is conventional in engineering fire simulations. For oxygen mole fraction of 0.21 in the oxidizer co-flow, good agreement between the predicted and the measured spatial distributions of mean temperatures and soot volume fractions has been demonstrated, while considerable deviation is observed for the velocity profiles in the vicinity of the burner. At any oxygen concentration, the experimental combustion efficiency and radiative fraction are reasonably replicated by the simulations, and the limiting oxygen concentration causing complete flame extinguishment is predicted well by the SCM.
- Keywords
- DISSIPATION CONCEPT, THERMAL-RADIATION, SOOT, EXTINCTION, COMBUSTION, MODEL, EXTENSION
Downloads
-
Moorthamers 2024 J. Phys. Conf. Ser. 2885 012038.pdf
- full text (Published version)
- |
- open access
- |
- |
- 852.56 KB
Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-01KERPTEQ24GAWGTT70TP6FP4B
- MLA
- Moorthamers, Youk, et al. “Large Eddy Simulations of Weakly Turbulent Diffusion Flames in a Co-Flow with Reduced Oxygen Concentration.” 4TH EUROPEAN SYMPOSIUM ON FIRE SAFETY SCIENCE, vol. 2885, 2024, doi:10.1088/1742-6596/2885/1/012038.
- APA
- Moorthamers, Y., Snegirev, A., Maragkos, G., Thabari, M. J. A., & Merci, B. (2024). Large eddy simulations of weakly turbulent diffusion flames in a co-flow with reduced oxygen concentration. 4TH EUROPEAN SYMPOSIUM ON FIRE SAFETY SCIENCE, 2885. https://doi.org/10.1088/1742-6596/2885/1/012038
- Chicago author-date
- Moorthamers, Youk, Alexander Snegirev, Georgios Maragkos, Muhammad Jeri At Thabari, and Bart Merci. 2024. “Large Eddy Simulations of Weakly Turbulent Diffusion Flames in a Co-Flow with Reduced Oxygen Concentration.” In 4TH EUROPEAN SYMPOSIUM ON FIRE SAFETY SCIENCE. Vol. 2885. https://doi.org/10.1088/1742-6596/2885/1/012038.
- Chicago author-date (all authors)
- Moorthamers, Youk, Alexander Snegirev, Georgios Maragkos, Muhammad Jeri At Thabari, and Bart Merci. 2024. “Large Eddy Simulations of Weakly Turbulent Diffusion Flames in a Co-Flow with Reduced Oxygen Concentration.” In 4TH EUROPEAN SYMPOSIUM ON FIRE SAFETY SCIENCE. Vol. 2885. doi:10.1088/1742-6596/2885/1/012038.
- Vancouver
- 1.Moorthamers Y, Snegirev A, Maragkos G, Thabari MJA, Merci B. Large eddy simulations of weakly turbulent diffusion flames in a co-flow with reduced oxygen concentration. In: 4TH EUROPEAN SYMPOSIUM ON FIRE SAFETY SCIENCE. 2024.
- IEEE
- [1]Y. Moorthamers, A. Snegirev, G. Maragkos, M. J. A. Thabari, and B. Merci, “Large eddy simulations of weakly turbulent diffusion flames in a co-flow with reduced oxygen concentration,” in 4TH EUROPEAN SYMPOSIUM ON FIRE SAFETY SCIENCE, Barcelona, SPAIN, 2024, vol. 2885.
@inproceedings{01KERPTEQ24GAWGTT70TP6FP4B,
abstract = {{A novel sub-grid combustion model (SCM) recently proposed for weakly turbulent buoyant diffusion flames is applied to simulate 10 and 15 kW ethylene-fueled flames produced by a circular porous burner in the oxidizer co-flow with normal and reduced oxygen concentrations. The computational approach enables modeling soot production and radiative emission based on local resolved specie concentrations and temperature, thereby avoiding prescription of the soot yield and global radiative fraction as is conventional in engineering fire simulations. For oxygen mole fraction of 0.21 in the oxidizer co-flow, good agreement between the predicted and the measured spatial distributions of mean temperatures and soot volume fractions has been demonstrated, while considerable deviation is observed for the velocity profiles in the vicinity of the burner. At any oxygen concentration, the experimental combustion efficiency and radiative fraction are reasonably replicated by the simulations, and the limiting oxygen concentration causing complete flame extinguishment is predicted well by the SCM.}},
articleno = {{012038}},
author = {{Moorthamers, Youk and Snegirev, Alexander and Maragkos, Georgios and Thabari, Muhammad Jeri At and Merci, Bart}},
booktitle = {{4TH EUROPEAN SYMPOSIUM ON FIRE SAFETY SCIENCE}},
issn = {{1742-6588}},
keywords = {{DISSIPATION CONCEPT,THERMAL-RADIATION,SOOT,EXTINCTION,COMBUSTION,MODEL,EXTENSION}},
language = {{eng}},
location = {{Barcelona, SPAIN}},
pages = {{6}},
title = {{Large eddy simulations of weakly turbulent diffusion flames in a co-flow with reduced oxygen concentration}},
url = {{http://doi.org/10.1088/1742-6596/2885/1/012038}},
volume = {{2885}},
year = {{2024}},
}
- Altmetric
- View in Altmetric
- Web of Science
- Times cited: