Advanced

Experimental and LES investigations of a SGT-800 burner in a combustion rig

Lörstad, Daniel; Lindholm, Annika; Alin, Niklas; Fureby, Christer; Lantz, Andreas LU ; Collin, Robert LU and Aldén, Marcus LU (2010) ASME Turbo Expo 2010: Power for Land, Sea, and Air In Proceedings of ASME, GT2010-22688 Volume 2: Combustion, Fuels and Emissions, Parts A and B. p.549-561
Abstract
The Siemens gas turbine SGT-800 has an annular combustor and 30 dry low emission burners. In order to further reduce the emission levels and to obtain improved understanding of the flow and associated flame dynamics, single burner rig tests have been performed. The laboratory measurements are complemented by Large Eddy Simulation (LES) to analyze the effect on the flame dynamics due to the transient fuel distribution and mixing process in the burner. The study includes both atmospheric and high pressure conditions. The computational model was developed jointly by Siemens Industrial Turbomachinery AB (SIT) and FOI. It is based on a finite rate chemistry LES model using a Partially Stirred Reactor (PaSR) turbulence chemistry interaction... (More)
The Siemens gas turbine SGT-800 has an annular combustor and 30 dry low emission burners. In order to further reduce the emission levels and to obtain improved understanding of the flow and associated flame dynamics, single burner rig tests have been performed. The laboratory measurements are complemented by Large Eddy Simulation (LES) to analyze the effect on the flame dynamics due to the transient fuel distribution and mixing process in the burner. The study includes both atmospheric and high pressure conditions. The computational model was developed jointly by Siemens Industrial Turbomachinery AB (SIT) and FOI. It is based on a finite rate chemistry LES model using a Partially Stirred Reactor (PaSR) turbulence chemistry interaction model and a two-step CH4 /air mechanism developed by FOI. The results are compared to measurements performed jointly by SIT and Lund Institute of Technology. The experimental data includes wall temperature, pressure fluctuations, light intensity variation and simultaneous Planar Laser Induced Fluorescence of OH and acetone. The study is further complemented by Reynolds Averaged Navier-Stokes (RANS) calculations of the fuel concentration field evaluated to laser measurements in a water rig using the same burner configuration. Different burner fuel distributions are examined and the corresponding influence on the downstream mixing, fuel distribution and flame dynamics are studied. The results indicate that the fuel distribution upstream the flame, the detailed modeling of the fuel supply manifold, including the specification of numerical boundary conditions, and the flow in the fuel and air supply pipes, have significant influence on the flame dynamics. This is proven by the successful combustion LES of an unstable flame that experiences high flame dynamics and that a modification of the boundary conditions alters the dynamics resulting in a more stable flame. This is well in accordance with the experimental data and previous experience at SIT. The modal structures caused by the interaction between the flow, acoustics and flame dynamics are analyzed using the Proper Orthogonal Decomposition (POD) technique. The dominating modes in general originate from the burner mixing tube air-fuel-mass flow-interaction and flame-combustion chamber interaction. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Proceedings of ASME, GT2010-22688
volume
Volume 2: Combustion, Fuels and Emissions, Parts A and B
pages
13 pages
publisher
American Society Of Mechanical Engineers (ASME)
conference name
ASME Turbo Expo 2010: Power for Land, Sea, and Air
external identifiers
  • other:GT2010-22688
  • scopus:82055204988
ISBN
978-0-7918-4397-0
DOI
10.1115/GT2010-22688
language
English
LU publication?
yes
id
ddadec85-b4ec-4c73-8d26-ecd00937186d (old id 2543222)
date added to LUP
2012-05-28 22:46:26
date last changed
2017-06-04 04:40:05
@inproceedings{ddadec85-b4ec-4c73-8d26-ecd00937186d,
  abstract     = {The Siemens gas turbine SGT-800 has an annular combustor and 30 dry low emission burners. In order to further reduce the emission levels and to obtain improved understanding of the flow and associated flame dynamics, single burner rig tests have been performed. The laboratory measurements are complemented by Large Eddy Simulation (LES) to analyze the effect on the flame dynamics due to the transient fuel distribution and mixing process in the burner. The study includes both atmospheric and high pressure conditions. The computational model was developed jointly by Siemens Industrial Turbomachinery AB (SIT) and FOI. It is based on a finite rate chemistry LES model using a Partially Stirred Reactor (PaSR) turbulence chemistry interaction model and a two-step CH4 /air mechanism developed by FOI. The results are compared to measurements performed jointly by SIT and Lund Institute of Technology. The experimental data includes wall temperature, pressure fluctuations, light intensity variation and simultaneous Planar Laser Induced Fluorescence of OH and acetone. The study is further complemented by Reynolds Averaged Navier-Stokes (RANS) calculations of the fuel concentration field evaluated to laser measurements in a water rig using the same burner configuration. Different burner fuel distributions are examined and the corresponding influence on the downstream mixing, fuel distribution and flame dynamics are studied. The results indicate that the fuel distribution upstream the flame, the detailed modeling of the fuel supply manifold, including the specification of numerical boundary conditions, and the flow in the fuel and air supply pipes, have significant influence on the flame dynamics. This is proven by the successful combustion LES of an unstable flame that experiences high flame dynamics and that a modification of the boundary conditions alters the dynamics resulting in a more stable flame. This is well in accordance with the experimental data and previous experience at SIT. The modal structures caused by the interaction between the flow, acoustics and flame dynamics are analyzed using the Proper Orthogonal Decomposition (POD) technique. The dominating modes in general originate from the burner mixing tube air-fuel-mass flow-interaction and flame-combustion chamber interaction.},
  author       = {Lörstad, Daniel and Lindholm, Annika and Alin, Niklas and Fureby, Christer and Lantz, Andreas and Collin, Robert and Aldén, Marcus},
  booktitle    = {Proceedings of ASME, GT2010-22688},
  isbn         = {978-0-7918-4397-0},
  language     = {eng},
  pages        = {549--561},
  publisher    = {American Society Of Mechanical Engineers (ASME)},
  title        = {Experimental and LES investigations of a SGT-800 burner in a combustion rig},
  url          = {http://dx.doi.org/10.1115/GT2010-22688},
  volume       = {Volume 2: Combustion, Fuels and Emissions, Parts A and B},
  year         = {2010},
}