Studying the Stabilization Dynamics of Swirling Partially Premixed Flames by Proper Orthogonal Decomposition
(2012) In Journal of Engineering for Gas Turbines and Power 134(10).- Abstract
- Environmental regulations are continuously pushing lower emissions with an impact on the combustion process in gas turbines (GTs). As a consequence, GT combustors operate in very lean regimes (i. e., at relatively low temperature) to reduce NOx formation. Unfortunately, stabilization becomes a challenge for these lean premixed flames. The extremely unsteady dynamics of swirl stabilized flames present crucial issues and this investigation aim is understanding the interaction of swirl stabilization with large coherent fluctuations inherent to vortex breakdown. The investigation utilizes a simplified cylindrical model combustor consisting of a premixing tube discharging in a larger combustion chamber. Fuel and swirling air are separately... (More)
- Environmental regulations are continuously pushing lower emissions with an impact on the combustion process in gas turbines (GTs). As a consequence, GT combustors operate in very lean regimes (i. e., at relatively low temperature) to reduce NOx formation. Unfortunately, stabilization becomes a challenge for these lean premixed flames. The extremely unsteady dynamics of swirl stabilized flames present crucial issues and this investigation aim is understanding the interaction of swirl stabilization with large coherent fluctuations inherent to vortex breakdown. The investigation utilizes a simplified cylindrical model combustor consisting of a premixing tube discharging in a larger combustion chamber. Fuel and swirling air are separately injected in the mixing tube so that a partially premixed swirling jet encounters vortex breakdown and allows the partially premixed flame to stabilize. The aforementioned extreme sensitivity of lean partially premixed flames challenges any investigation either for measuring, simulating, or post-processing the case of interest. In this paper, the problem is addressed using large eddy simulation (LES) and planar laser induced fluorescence. The LES data are used to follow the fuel air/mixing along with the fuel combustion evidencing large-scale dynamics. These dynamics are further investigated using proper orthogonal decomposition to identify the role of the premixing stage and of the precessing vortex core in the flame behavior. [DOI: 10.1115/1.4007013] (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3190028
- author
- Duwig, Christophe LU ; Ducruix, Sebastien and Veynante, Denis
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Engineering for Gas Turbines and Power
- volume
- 134
- issue
- 10
- article number
- 101501
- publisher
- American Society Of Mechanical Engineers (ASME)
- external identifiers
-
- wos:000308726900001
- scopus:84865245057
- ISSN
- 1528-8919
- DOI
- 10.1115/1.4007013
- language
- English
- LU publication?
- yes
- id
- 29e39979-0303-4aac-8848-f0351f27def0 (old id 3190028)
- date added to LUP
- 2016-04-01 10:06:44
- date last changed
- 2022-04-27 18:42:06
@article{29e39979-0303-4aac-8848-f0351f27def0,
abstract = {{Environmental regulations are continuously pushing lower emissions with an impact on the combustion process in gas turbines (GTs). As a consequence, GT combustors operate in very lean regimes (i. e., at relatively low temperature) to reduce NOx formation. Unfortunately, stabilization becomes a challenge for these lean premixed flames. The extremely unsteady dynamics of swirl stabilized flames present crucial issues and this investigation aim is understanding the interaction of swirl stabilization with large coherent fluctuations inherent to vortex breakdown. The investigation utilizes a simplified cylindrical model combustor consisting of a premixing tube discharging in a larger combustion chamber. Fuel and swirling air are separately injected in the mixing tube so that a partially premixed swirling jet encounters vortex breakdown and allows the partially premixed flame to stabilize. The aforementioned extreme sensitivity of lean partially premixed flames challenges any investigation either for measuring, simulating, or post-processing the case of interest. In this paper, the problem is addressed using large eddy simulation (LES) and planar laser induced fluorescence. The LES data are used to follow the fuel air/mixing along with the fuel combustion evidencing large-scale dynamics. These dynamics are further investigated using proper orthogonal decomposition to identify the role of the premixing stage and of the precessing vortex core in the flame behavior. [DOI: 10.1115/1.4007013]}},
author = {{Duwig, Christophe and Ducruix, Sebastien and Veynante, Denis}},
issn = {{1528-8919}},
language = {{eng}},
number = {{10}},
publisher = {{American Society Of Mechanical Engineers (ASME)}},
series = {{Journal of Engineering for Gas Turbines and Power}},
title = {{Studying the Stabilization Dynamics of Swirling Partially Premixed Flames by Proper Orthogonal Decomposition}},
url = {{http://dx.doi.org/10.1115/1.4007013}},
doi = {{10.1115/1.4007013}},
volume = {{134}},
year = {{2012}},
}