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Prediction of NO and CO Distribution in Gas Turbine Combustors PUBLIC ACCESS

[+] Author Affiliations
Shinichi Kajita

Kawasaki Heavy Industries, Ltd., Akashi, Japan

Ryuichi Matumoto

Kobe University, Kobe, Japan

Paper No. 87-GT-63, pp. V003T06A008; 6 pages
doi:10.1115/87-GT-63
From:
  • ASME 1987 International Gas Turbine Conference and Exhibition
  • Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations
  • Anaheim, California, USA, May 31–June 4, 1987
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7925-2
  • Copyright © 1987 by ASME

abstract

An experimental and numerical investigation was conducted to assess the validity of a prediction procedure of NO and CO formed in gas turbine combustors.

A premixed gas turbine combustor burning propane was used in the experimental program, and the flow, temperature and pollutants fields were measured.

The prediction procedure solves the governing conservation equations of mass, momentum, energy and chemical species simultaneously by means of finite difference solution algorithm. Two main mathematical models were employed in the procedure to represent the turbulent nature of the flow and the chemical reaction rates. For the turbulence model, the two-equation k-ε model was applied. The chemical reaction model assumed a two step reaction, and the effect of turbulence on reaction rates is taken into account by employing the modified eddy-break-up model which considers the dissipation rate of eddy and the concentrations of fuel and combustion products. The reaction rate is considered to be the smaller of the two expressions given by the Arrhenius equation and the modified eddy-break-up model. For NO formation, the extended Zeldovich mecanism was assumed. The prediction results were compared with those obtained from the corresponding expreiment.

The prediction results showed the correct overall features, but a quantitative agreement was not obtained for NO and CO concentrations.

Copyright © 1987 by ASME
This article is only available in the PDF format.

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