Active Control of Combustion Instability in a Liquid–Fueled Low–NOx Combustor FREE

[+] Author Affiliations
Jeffrey M. Cohen, Nancy M. Rey, Clas A. Jacobson, Torger J. Anderson

United Technologies Research Center, East Hartford, CT

Paper No. 98-GT-267, pp. V003T06A020; 9 pages
  • ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations
  • Stockholm, Sweden, June 2–5, 1998
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7864-4
  • Copyright © 1998 by ASME


A practical active control system for the mitigation of combustion instability has been designed and demonstrated in a lean, premixed, single -nozzle combustor at realistic engine operating conditions. A full -scale engine fuel nozzle was modified to incorporate a simple fuel flow actuator. Results indicate that the system was capable of reducing pressure fluctuations by 82% (15 dB or 5.6X) while maintaining or reducing NOx and CO emissions levels.

Copyright © 1998 by ASME
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