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Numerical study of thermo-acoustic waves generation by a swirling flame using a new approach based on large eddy simulation

Duwig, Christophe LU ; Gherman, Bogdan, George LU ; Mihaescu, Mihai LU ; Salewski, Mirko LU and Fuchs, Laszlo LU (2005) ASME Turbo Expo 2005 - Gas Turbie Technology: Focus for the Future In Proceedings of the ASME Turbo Expo 2. p.67-75
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. In this paper, we present a new technique that is computationally efficient, for capturing the thermo-acoustic waves in low Mach number combustors. The idea is to utilize the fact that the acoustic related pressure fluctuations are small as compared to the dynamic pressure. Semi-compressible LES of reacting flow is performed and while the pressure perturbations related to the acoustic-wave propagation are handled separately. The equations are solved individually while allowing... (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. In this paper, we present a new technique that is computationally efficient, for capturing the thermo-acoustic waves in low Mach number combustors. The idea is to utilize the fact that the acoustic related pressure fluctuations are small as compared to the dynamic pressure. Semi-compressible LES of reacting flow is performed and while the pressure perturbations related to the acoustic-wave propagation are handled separately. The equations are solved individually while allowing interaction between the two systems. The technique has been applied to the study of the generation and propagation of thermo-acoustic waves in a combustion chamber. A sensitivity analysis is presented and most important instability modes are identified. Copyright (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Electricity demand growth, Mach number, Thermo-acoustic waves
in
Proceedings of the ASME Turbo Expo
volume
2
pages
67 - 75
publisher
American Society Of Mechanical Engineers (ASME)
conference name
ASME Turbo Expo 2005 - Gas Turbie Technology: Focus for the Future
external identifiers
  • WOS:000243376400007
  • Scopus:27744605925
language
English
LU publication?
yes
id
32a18d4a-1b65-4edc-aa4a-5e11202c9eb8 (old id 615595)
date added to LUP
2007-11-25 09:53:01
date last changed
2017-01-01 08:02:38
@inproceedings{32a18d4a-1b65-4edc-aa4a-5e11202c9eb8,
  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. In this paper, we present a new technique that is computationally efficient, for capturing the thermo-acoustic waves in low Mach number combustors. The idea is to utilize the fact that the acoustic related pressure fluctuations are small as compared to the dynamic pressure. Semi-compressible LES of reacting flow is performed and while the pressure perturbations related to the acoustic-wave propagation are handled separately. The equations are solved individually while allowing interaction between the two systems. The technique has been applied to the study of the generation and propagation of thermo-acoustic waves in a combustion chamber. A sensitivity analysis is presented and most important instability modes are identified. Copyright},
  author       = {Duwig, Christophe and Gherman, Bogdan, George and Mihaescu, Mihai and Salewski, Mirko and Fuchs, Laszlo},
  booktitle    = {Proceedings of the ASME Turbo Expo},
  keyword      = {Electricity demand growth,Mach number,Thermo-acoustic waves},
  language     = {eng},
  pages        = {67--75},
  publisher    = {American Society Of Mechanical Engineers (ASME)},
  title        = {Numerical study of thermo-acoustic waves generation by a swirling flame using a new approach based on large eddy simulation},
  volume       = {2},
  year         = {2005},
}