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Prediction of CO and NOx Pollutants in a Stratified Bluff Body Burner

[+] Author Affiliations
Pascal Gruhlke, Fabian Proch, Andreas M. Kempf

University of Duisburg-Essen, Duisberg, Germany

Enric Illana Mahiques, Stefan Dederichs, Christian Beck

Siemens AG, Muelheim an der Ruhr, Germany

Paper No. GT2017-63203, pp. V04AT04A012; 12 pages
doi:10.1115/GT2017-63203
From:
  • ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition
  • Volume 4A: Combustion, Fuels and Emissions
  • Charlotte, North Carolina, USA, June 26–30, 2017
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5084-8
  • Copyright © 2017 by Siemens Energy, Inc.

abstract

The major exhaust gas pollutants from heavy duty gas turbine engines are CO and NOx. The difficulty of predicting the concentration of these combustion products originates from their wide range of chemical time scales. In this paper, a combustion model that includes the prediction of the carbon monoxide and nitric oxide emissions is tested. Large eddy simulations (LES) are performed using a compressible code (OpenFOAM). A modified flamelet generated manifolds (FGM) approach is applied with a thickened flame approach (ATF) to resolve the flame on the numerical grid, with a flame sensor to ensure that the flame is only thickened in the flame region. For the prediction of the CO and NOx emissions, pollutant species transport equations and a second, CO based, progress variable are introduced for the flame burnout zone to account for slow chemistry effects. For the validation of the models, the Cambridge burner of Sweeney and Hochgreb [1, 2] is employed, as both carbon monoxide and nitric oxide [3] data is available.

Copyright © 2017 by Siemens Energy, Inc.

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