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CFD Predictions and Field Measurements of NOx Emissions From LM1600 Gas Turbine During Part Load Operation

[+] Author Affiliations
G. R. Price, K. K. Botros

NOVA Research & Technology Centre, Calgary, Canada

G. M. Goldin

Fluent Inc., Lebanon, NH

Paper No. 2000-GT-0350, pp. V002T03A007; 11 pages
doi:10.1115/2000-GT-0350
From:
  • ASME Turbo Expo 2000: Power for Land, Sea, and Air
  • Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations
  • Munich, Germany, May 8–11, 2000
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7855-2
  • Copyright © 2000 by ASME

abstract

CFD simulations of the combustion process and formation of emissions in an industrial GE LM1600 gas turbine have been performed over a range of unit loads. Two combustion models were considered here to characterize the combustion process, the chemical equilibrium model and the non-equilibrium laminar flamelet model. The flamelet model predictions of nitric oxide concentration demonstrated much closer agreement with field measurements of continuous emissions monitoring systems, due to accurate modeling of the oxygen radial concentration. The predictions made with this model are within 15% at maximum load and considerably better at lower loads. Field measurements also showed that nitric oxide constitutes about 95% of the total NOx measured. Unburnt hydrocarbons and carbon monoxide emissions are significantly over-predicted, however, arguably as a result of neglecting their oxidation in the high temperature, fuel-lean environment of the turbine and exhaust stack downstream of the combustor.

Copyright © 2000 by ASME

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