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Influence of Inlet Conditions on Flow and Combustion Characteristics of a Model Annular Combustor PUBLIC ACCESS

[+] Author Affiliations
F. Baron, M. Kanniche, N. Mechitoua

Electricité de France, Chatou, France

Paper No. 94-GT-281, pp. V003T06A019; 7 pages
doi:10.1115/94-GT-281
From:
  • ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations
  • The Hague, Netherlands, June 13–16, 1994
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7885-9
  • Copyright © 1994 by ASME

abstract

k-ε model coupled with chemical equilibrium hypothesis is applied to a sector of an annular gas turbine combustion chamber similar to the one used in small gas turbine engines. The β-function is used as probability-density-function (pdf) of the distribution of a mixing rate scalar. The computation results are compared with velocity, temperature and species concentration measurements with air-to-fuel ratio of 29 and two inlet air temperatures of 315 K and 515 K. The measurements are reported in the PhD thesis of Tse [2] and in Bicen et al. [1].

Computed velocity and temperature are in good agreement with measurements, except close to primary injection holes where the normal impacts of air jets with the bulk flow involve strong streamline curvature which cannot be well predicted by standard k-ε model.

Computed species concentrations are in good agreement with measurements, except (as expected) for CO concentration which is overestimated. Since the kinetic of CO burn-up is limited, the overestimation of CO concentration is a consequence of the simplified chemical reaction step.

Copyright © 1994 by ASME
This article is only available in the PDF format.

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