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Combustor Configuration Influence on Combusion Instabilities Performance

[+] Author Affiliations
Georgy K. Vedeshkin, Evgeniy D. Sverdlov, Alexey N. Doubovitsky

Central Institute of Aviation Motors named after P.I. Baranov, Moscow, Russia

Paper No. GT2010-22589, pp. 493-497; 5 pages
  • ASME Turbo Expo 2010: Power for Land, Sea, and Air
  • Volume 2: Combustion, Fuels and Emissions, Parts A and B
  • Glasgow, UK, June 14–18, 2010
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4397-0 | eISBN: 978-0-7918-3872-3
  • Copyright © 2010 by ASME


The paper describes the results of calculations and experimental investigations of combustor configurations. It is shown that combustor configuration effects high frequency and low frequency combustor instabilities, gas dynamics of the flow, recirculation zones dimensions and lean flame out limits. Combustion instability modes had been investigated in two versions of combustor configurations: with the abrupt divergence of the channel and with an inlet conical diffuser. Gas flow instabilities had been investigated in the central recirculation zone without any chemical reactions. As a result the combustion instability model in which a role of a feed back mechanism is performed by hydrodynamic gas flow instability in the combustor is suggested. Modification of the combustor with a conical diffuser with the suggested model of the hydrodynamic combustion instability taken into account made it possible to settle the instability problem for the given combustor.

Copyright © 2010 by ASME



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