Today’s and future electric power generation is characterized by a large diversification using all kind of sources, including renewables resulting in noncoherent fluctuations of power supply and power usage. In this context, gas turbines offer a high operational flexibility and a good turn down ratio. In order to guide the design and down select promising solutions for improving partload emissions, a new combustion model based on the assumption of two separate timescales for the fast premixed flame stabilization and the slow post flame burnout zone is developed within the commercial computational fluid dynamics (CFD) code ANSYS CFX. This model enables the prediction of CO emissions generally limiting the turn down ratio of gas turbines equipped with modern low combustion systems. The model is explained and validated at lab scale conditions. Finally, the application of the model for a full scale analysis of a gas turbine combustion system is demonstrated.
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July 2011
Research Papers
CFD Prediction of Partload CO Emissions Using a Two-Timescale Combustion Model
Uwe Gruschka,
Uwe Gruschka
Energy Sector,
Siemens AG
, 45478 Mülheim/Ruhr, Germany
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Werner Krebs,
Werner Krebs
Energy Sector,
Siemens AG
, 45478 Mülheim/Ruhr, Germany
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Y. Egorov,
Y. Egorov
ANSYS Germany
, 83624 Otterfing, Germany
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H. Forkel,
H. Forkel
ANSYS Germany
, 83624 Otterfing, Germany
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J. Ferreira,
J. Ferreira
ANSYS Germany
, 83624 Otterfing, Germany
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Kai Aschmoneit
Kai Aschmoneit
EKT,
Darmstadt University of Technology
, 64287 Darmstadt, Germany
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Bernhard Wegner
Uwe Gruschka
Energy Sector,
Siemens AG
, 45478 Mülheim/Ruhr, Germany
Werner Krebs
Energy Sector,
Siemens AG
, 45478 Mülheim/Ruhr, Germany
Y. Egorov
ANSYS Germany
, 83624 Otterfing, Germany
H. Forkel
ANSYS Germany
, 83624 Otterfing, Germany
J. Ferreira
ANSYS Germany
, 83624 Otterfing, Germany
Kai Aschmoneit
EKT,
Darmstadt University of Technology
, 64287 Darmstadt, GermanyJ. Eng. Gas Turbines Power. Jul 2011, 133(7): 071502 (7 pages)
Published Online: March 17, 2011
Article history
Received:
April 21, 2010
Revised:
May 16, 2010
Online:
March 17, 2011
Published:
March 17, 2011
Citation
Wegner, B., Gruschka, U., Krebs, W., Egorov, Y., Forkel, H., Ferreira, J., and Aschmoneit, K. (March 17, 2011). "CFD Prediction of Partload CO Emissions Using a Two-Timescale Combustion Model." ASME. J. Eng. Gas Turbines Power. July 2011; 133(7): 071502. https://doi.org/10.1115/1.4002021
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