Thermoacoustic systems contain multiphysics and encompass multiple scales. Thermoacoustic instabilities occur whenever there is a positive feedback between a source of unsteady heat release and the enclosing acoustic field. Being large amplitude self-sustaining oscillations, thermoacoustic instabilities can easily cause the rocket engines, gas turbines or combustor to vibrate excessively or to even fail. During such instabilities, thermoacoustic systems display a wide variety of asymptotic dynamical behaviour; from steady states to chaotic trajectories. The ability to control the nature and characteristics of thermoacoustic oscillations is therefore a desired capability.
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