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Bifurcation analysis and observation of intermittency in combustion-driven thermoacoustic oscillations
Published in
2012
Abstract
Thermoacoustic oscillations occur due to the interaction between the acoustic field in the combustor and the unsteady heat release rate. This interaction gives rise to a wide variety of dynamical states. In our experiments on a ducted laminar premixed flame, a prototypical thermoacoustic system, we observed presence of type-II intermittency in addition to limit cycle oscillation and quasi-periodic oscillation. Each dynamical state of the system are investigated based on the analysis of the reconstructed phase space and recurrence plots. The intermittent state resulted from the bifurcation of a quasi-periodic state and further, was followed by flame blowout. The dynamical behavior of the flame during intermittency is also discussed through flame imaging. Copyright © 2012 by L. Kabiraj and R. I. Sujith.
About the journal
Journal50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
Open AccessNo
Concepts (22)
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    Bifurcation analysis
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    Dynamical behaviors
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    DYNAMICAL STATE
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    FLAME IMAGING
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    Heat release rate (hrr)
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    Intermittency
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    LAMINAR PREMIXED FLAMES
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    Limit cycle oscillation (lco)
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    Quasi-periodic
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    QUASIPERIODIC OSCILLATIONS
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    RECONSTRUCTED PHASE SPACE
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    RECURRENCE PLOT
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    THERMOACOUSTIC OSCILLATIONS
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    THERMOACOUSTIC SYSTEMS
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    Acoustic fields
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    Aerospace engineering
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    Bifurcation (mathematics)
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    Exhibitions
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    Phase space methods
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    PLASMA OSCILLATIONS
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    Thermoacoustics
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    Combustion