Large Eddy simulation of a swirling flame response to swirl modulation with impact on combustion stability
(2005) 43rd AIAA Aerospace Sciences Meeting and Exhibit p.4929-4940- Abstract
- A swirl stabilized flame has been studied numerically using Large Eddy Simulation. The response of the flame to a large swirl number modulation has as been determined. Decreasing the swirl number moderately does not destabilize the flame. Decreasing further the swirl number induces a transition from stabilized to a jet flame with increase in the flame fluctuations. Increasing back the swirl restores the original configuration. However, the re-stabilization has been found to be considerably slower as compared to the burner aerodynamic time scale. Further studies, including identification of some characteristic turbulent structures, have been carried out. Both a helical and an axial mode have been identified. The helical mode arises in the... (More)
- A swirl stabilized flame has been studied numerically using Large Eddy Simulation. The response of the flame to a large swirl number modulation has as been determined. Decreasing the swirl number moderately does not destabilize the flame. Decreasing further the swirl number induces a transition from stabilized to a jet flame with increase in the flame fluctuations. Increasing back the swirl restores the original configuration. However, the re-stabilization has been found to be considerably slower as compared to the burner aerodynamic time scale. Further studies, including identification of some characteristic turbulent structures, have been carried out. Both a helical and an axial mode have been identified. The helical mode arises in the central recirculation zone, whereas the axial mode arises in the outer shear-layer. Both modes are possible sources of thermo-acoustic instabilities. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/616039
- author
- Duwig, Christophe LU ; Szász, Robert-Zoltán LU ; Fuchs, Laszlo LU and Troger, C
- organization
- publishing date
- 2005
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Swirl modulation, Swirl number, Large Eddy simulation (LES), Swirling flame
- host publication
- 43rd AIAA Aerospace Sciences Meeting and Exhibit - Meeting Papers
- pages
- 4929 - 4940
- publisher
- American Institute of Aeronautics and Astronautics
- conference name
- 43rd AIAA Aerospace Sciences Meeting and Exhibit
- conference location
- Reno, NV, United States
- conference dates
- 2005-01-10 - 2005-01-13
- external identifiers
-
- scopus:30744462336
- language
- English
- LU publication?
- yes
- id
- c01ec884-5594-4761-8cc2-f2e74a59a290 (old id 616039)
- date added to LUP
- 2016-04-04 10:28:02
- date last changed
- 2022-03-15 21:49:32
@inproceedings{c01ec884-5594-4761-8cc2-f2e74a59a290, abstract = {{A swirl stabilized flame has been studied numerically using Large Eddy Simulation. The response of the flame to a large swirl number modulation has as been determined. Decreasing the swirl number moderately does not destabilize the flame. Decreasing further the swirl number induces a transition from stabilized to a jet flame with increase in the flame fluctuations. Increasing back the swirl restores the original configuration. However, the re-stabilization has been found to be considerably slower as compared to the burner aerodynamic time scale. Further studies, including identification of some characteristic turbulent structures, have been carried out. Both a helical and an axial mode have been identified. The helical mode arises in the central recirculation zone, whereas the axial mode arises in the outer shear-layer. Both modes are possible sources of thermo-acoustic instabilities.}}, author = {{Duwig, Christophe and Szász, Robert-Zoltán and Fuchs, Laszlo and Troger, C}}, booktitle = {{43rd AIAA Aerospace Sciences Meeting and Exhibit - Meeting Papers}}, keywords = {{Swirl modulation; Swirl number; Large Eddy simulation (LES); Swirling flame}}, language = {{eng}}, pages = {{4929--4940}}, publisher = {{American Institute of Aeronautics and Astronautics}}, title = {{Large Eddy simulation of a swirling flame response to swirl modulation with impact on combustion stability}}, year = {{2005}}, }