Shear Layer Mixing for Low Emission Gas Turbine Primary Zones PUBLIC ACCESS

[+] Author Affiliations
N. A. Al-Dabbagh, G. E. Andrews, R. Manorharan

University of Leeds, Leeds, UK

Paper No. 84-GT-13, pp. V003T06A002; 10 pages
  • ASME 1984 International Gas Turbine Conference and Exhibit
  • Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations
  • Amsterdam, The Netherlands, June 4–7, 1984
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7948-1
  • Copyright © 1984 by ASME


Shear layer turbulent fuel and air mixing has been utilised in a simulated gas turbine primary zone combustor. Two methods of fuel injection and two values of the number of air injection holes have been investigated at a constant pressure loss of 4% at a reference Mach number of 0.047. The method of fuel injection and the number of air injection holes was found to influence the flame stability and NOx emissions. A large number of holes produced much higher NOx emissions which was not compensated for by the ability to operate at weaker equivalence ratios due to the greater flame stability. An optimum primary zone operating condition, for very low NOx and high combustion efficiencies involving a flame temperature of approximately 1600K was identified and there was a wide flame stability margin on this condition.

Copyright © 1984 by ASME
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