Study of a gas turbine combustion chamber: Influence of the mixing on the flame dynamics
(2004) 2004 ASME Turbo Expo 1. p.129-136- Abstract
- The new challenge of the Gas Turbine industry is to develop new technologies for meeting electricity demand growth and reducing harmful emissions. Thus a better understanding of the combustion phenomenon and an improvement in simulation capabilities are needed. Large Eddy Simulation tools brought the hope of meeting these two conditions and enabling the design of safe and clean burners. In the present paper, the influence of the unsteady mixing on the flame in a Lean Premixed Pre-vaporized combustor have been investigated. A premixed combustion flamelet model has been extended to non-uniform fuel/air mixtures cases. Extra terms in the equations, their effects and the modeling issues are discussed. Additionally, the effects of mixing on the... (More)
- The new challenge of the Gas Turbine industry is to develop new technologies for meeting electricity demand growth and reducing harmful emissions. Thus a better understanding of the combustion phenomenon and an improvement in simulation capabilities are needed. Large Eddy Simulation tools brought the hope of meeting these two conditions and enabling the design of safe and clean burners. In the present paper, the influence of the unsteady mixing on the flame in a Lean Premixed Pre-vaporized combustor have been investigated. A premixed combustion flamelet model has been extended to non-uniform fuel/air mixtures cases. Extra terms in the equations, their effects and the modeling issues are discussed. Additionally, the effects of mixing on the flow field in an industrial gas turbine combustion chamber have been investigated. The mean flow field has been found to be weakly sensitive to the mixing effects. It is deduced that the modeling of the mixing and the combustion can be decoupled in the RANS framework. Regarding the flame dynamics, all runs show similar characteristic frequencies. However, different details of models lead to differences in the temperature fluctuations. This suggests that a rigorous modeling of the thermo-acoustic sources (e.g. heat-release fluctuations) requires accurate modeling of the mixing/ combustion coupling, for handling accurately the dynamics of the flame. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/614950
- author
- Duwig, Christophe LU and Fuchs, Laszlo LU
- organization
- publishing date
- 2004
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Combustion coupling, Pre-vaporized combustors, Thermo-acoustic sources, Flame dynamics
- host publication
- Proceedings of the ASME Turbo Expo 2004
- volume
- 1
- pages
- 129 - 136
- publisher
- American Society Of Mechanical Engineers (ASME)
- conference name
- 2004 ASME Turbo Expo
- conference location
- Vienna, Austria
- conference dates
- 2004-06-14 - 2004-06-17
- external identifiers
-
- scopus:10244242637
- language
- English
- LU publication?
- yes
- id
- 9d3e3f51-c287-45d9-8d55-80978f63461b (old id 614950)
- date added to LUP
- 2016-04-04 10:11:50
- date last changed
- 2022-01-29 19:59:02
@inproceedings{9d3e3f51-c287-45d9-8d55-80978f63461b,
abstract = {{The new challenge of the Gas Turbine industry is to develop new technologies for meeting electricity demand growth and reducing harmful emissions. Thus a better understanding of the combustion phenomenon and an improvement in simulation capabilities are needed. Large Eddy Simulation tools brought the hope of meeting these two conditions and enabling the design of safe and clean burners. In the present paper, the influence of the unsteady mixing on the flame in a Lean Premixed Pre-vaporized combustor have been investigated. A premixed combustion flamelet model has been extended to non-uniform fuel/air mixtures cases. Extra terms in the equations, their effects and the modeling issues are discussed. Additionally, the effects of mixing on the flow field in an industrial gas turbine combustion chamber have been investigated. The mean flow field has been found to be weakly sensitive to the mixing effects. It is deduced that the modeling of the mixing and the combustion can be decoupled in the RANS framework. Regarding the flame dynamics, all runs show similar characteristic frequencies. However, different details of models lead to differences in the temperature fluctuations. This suggests that a rigorous modeling of the thermo-acoustic sources (e.g. heat-release fluctuations) requires accurate modeling of the mixing/ combustion coupling, for handling accurately the dynamics of the flame.}},
author = {{Duwig, Christophe and Fuchs, Laszlo}},
booktitle = {{Proceedings of the ASME Turbo Expo 2004}},
keywords = {{Combustion coupling; Pre-vaporized combustors; Thermo-acoustic sources; Flame dynamics}},
language = {{eng}},
pages = {{129--136}},
publisher = {{American Society Of Mechanical Engineers (ASME)}},
title = {{Study of a gas turbine combustion chamber: Influence of the mixing on the flame dynamics}},
volume = {{1}},
year = {{2004}},
}