Rabaccal, M. ; Franchetti, B. M. ; Marincola, F. C. ; Proch, F. ; Costa, M. ; Hasse, C. ; Kempf, A. M. (2015)
Large Eddy Simulation of coal combustion in a large-scale laboratory furnace.
In: Proceedings of the Combustion Institute, 35
doi: 10.1016/j.proci.2014.06.023
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Abstract A detailed Large Eddy Simulation (LES) of pulverised coal combustion in a large-scale laboratory furnace is presented. To achieve a detailed representation of the flow, mixing and particle dispersion, a massively parallel {LES} was performed. Different phenomenological network models were applied and compared to each other in order to obtain the most adequate devolatilization kinetic data for the LES. An iterative procedure allowed to optimise the devolatilization kinetic data for the studied coal and operating conditions. The particle combustion history is studied by analysing particle instantaneous properties giving a perspective on coal combustion that currently is not available by other means than LES. Predicted major species and temperature were compared with measurements and a good agreement was obtained. The finely resolved near burner region revealed that the flame is stabilised very close to the burner. Furthermore, two distinct zones of {CO2} production were found – one in the internal recirculation zone (IRZ) due to gaseous combustion, and one downstream of the vortex breakdown, due to intense char combustion. It was found that particle properties are inhomogeneous within the IRZ, whereas in the external recirculation zone (ERZ) and downstream of the vortex breakdown they were found to be homogeneous.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2015 |
| Autor(en): | Rabaccal, M. ; Franchetti, B. M. ; Marincola, F. C. ; Proch, F. ; Costa, M. ; Hasse, C. ; Kempf, A. M. |
| Art des Eintrags: | Bibliographie |
| Titel: | Large Eddy Simulation of coal combustion in a large-scale laboratory furnace |
| Sprache: | Englisch |
| Publikationsjahr: | 2015 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Proceedings of the Combustion Institute |
| Jahrgang/Volume einer Zeitschrift: | 35 |
| DOI: | 10.1016/j.proci.2014.06.023 |
| URL / URN: | http://dx.doi.org/10.1016/j.proci.2014.06.023 |
| Kurzbeschreibung (Abstract): | Abstract A detailed Large Eddy Simulation (LES) of pulverised coal combustion in a large-scale laboratory furnace is presented. To achieve a detailed representation of the flow, mixing and particle dispersion, a massively parallel {LES} was performed. Different phenomenological network models were applied and compared to each other in order to obtain the most adequate devolatilization kinetic data for the LES. An iterative procedure allowed to optimise the devolatilization kinetic data for the studied coal and operating conditions. The particle combustion history is studied by analysing particle instantaneous properties giving a perspective on coal combustion that currently is not available by other means than LES. Predicted major species and temperature were compared with measurements and a good agreement was obtained. The finely resolved near burner region revealed that the flame is stabilised very close to the burner. Furthermore, two distinct zones of {CO2} production were found – one in the internal recirculation zone (IRZ) due to gaseous combustion, and one downstream of the vortex breakdown, due to intense char combustion. It was found that particle properties are inhomogeneous within the IRZ, whereas in the external recirculation zone (ERZ) and downstream of the vortex breakdown they were found to be homogeneous. |
| Freie Schlagworte: | Large Eddy Simulation |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau > Fachgebiet Simulation reaktiver Thermo-Fluid Systeme (STFS) 16 Fachbereich Maschinenbau |
| Hinterlegungsdatum: | 29 Nov 2017 15:00 |
| Letzte Änderung: | 29 Nov 2017 15:00 |
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