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Numerical Simulation of Swirl-Stabilized Premixed Flames With a Turbulent Combustion Model Based on a Systematically Reduced 6-Step Reaction Mechanism

[+] Author Affiliations
Dieter E. Bohn, Joachim Lepers

Aachen University of Technology, Germany

Paper No. 2000-GT-0143, pp. V002T02A059; 8 pages
doi:10.1115/2000-GT-0143
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

This paper presents the application of a detailed combustion model for turbulent premixed combustion to a swirl-stabilized premix burner. Computations are carried out for atmospheric pressure and elevated pressure of 9 atm. Results of computations for atmospheric pressure are compared to experimental data.

The combustion model is of the joint-pdf type. The model is based on the characteristics of turbulent combustion under conditions typical for gas turbine burners. It incorporates a systematically reduced 6-step reaction mechanism yielding direct computation of radical concentrations via transport equations or steady-state assumptions. The model is able to simulate combustion of fuel gases containing methane, carbon monoxide, hydrogen, carbon dioxide and water. It is therefore applicable to both methane and low-BTU fuel gas combustion.

Based on computed radical concentrations, a post-processor for NOx-formation is applied. This post-processor considers thermal formation of nitrogen oxides and NO-formation via the nitrous-oxide path.

Copyright © 2000 by ASME

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