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Active control of combustion instability using fuel flow modulation
Author(s) -
Guyot Daniel,
Bothien Mirko R.,
Moeck Jonas P.,
Paschereit C. O.
Publication year - 2007
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200700715
Subject(s) - combustor , combustion , condenser (optics) , combustion chamber , flow (mathematics) , amplitude , microphone , mass flow , mechanics , flow control (data) , materials science , acoustics , control valves , physics , engineering , mechanical engineering , chemistry , sound pressure , optics , telecommunications , light source , organic chemistry
Phase‐shift control was applied to an atmospheric premix combustor test rig equipped with a swirl‐stabilized burner by modulating the pilot fuel flow. The employed closed loop control circuit incorporated condenser microphones recording the pressure oscillations inside the combustion chamber and valves controlling the fuel mass flow. The microphone signals were processed and command signals were sent to the valves. The rms of the pressure oscillations was reduced by up to 12 dB, the peak amplitude by up to 20 dB. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)