This paper describes simulation of a small stationary gas turbine combustor of a reverse flow, semi-silo type for power generation. The premixed coherent flame model (PCFM) is applied for partially premixed methane/air with an imposed downstream flame area density (FAD) to avoid flashback and incomplete combustion. Physical models are validated against the measurements of outlet temperature, product gas composition, and NO emission at the low operating pressure. Parametric study is performed to investigate the effect of load and pilot/total (P/T) fuel ratio on mixing characteristics and the resulting temperature distribution and pollutant emissions. As the P/T fuel ratio increases, the high temperature region over 1900 K enhances reaction of the mixture from the main nozzle in the primary mixing zone. For low P/T ratios, the pilot stream dilutes the mixture, on the contrary, to suppress reaction with an increasing height of the lifted flame. The NO is associated with the unmixedness as well as the mean temperature level and tends to increase with increasing load and P/T ratio. The high operating pressure does not affect overall velocity and temperature distribution, while it tends to increase NO and liner temperature under the given boundary conditions.
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February 2012
Research Papers
Parametric Simulation of Turbulent Reacting Flow and Emissions in a Lean Premixed Reverse Flow Type Gas Turbine Combustor
Daero Joung,
Daero Joung
Department of Mechanical Engineering,
Pohang University of Science and Technology
, Pohang 790-784, South Korea
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Kang Y. Huh,
Kang Y. Huh
Department of Mechanical Engineering,
Pohang University of Science and Technology
, Pohang 790-784, South Korea
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Yunho An
Yunho An
Doosan Heavy Industries & Construction
, Daejeon 305-811, South Korea
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Daero Joung
Department of Mechanical Engineering,
Pohang University of Science and Technology
, Pohang 790-784, South Korea
Kang Y. Huh
Department of Mechanical Engineering,
Pohang University of Science and Technology
, Pohang 790-784, South Korea
Yunho An
Doosan Heavy Industries & Construction
, Daejeon 305-811, South Korea
J. Eng. Gas Turbines Power. Feb 2012, 134(2): 021501 (9 pages)
Published Online: December 9, 2011
Article history
Received:
January 11, 2011
Revised:
June 1, 2011
Online:
December 9, 2011
Published:
December 9, 2011
Citation
Joung, D., Huh, K. Y., and An, Y. (December 9, 2011). "Parametric Simulation of Turbulent Reacting Flow and Emissions in a Lean Premixed Reverse Flow Type Gas Turbine Combustor." ASME. J. Eng. Gas Turbines Power. February 2012; 134(2): 021501. https://doi.org/10.1115/1.4004375
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