Abstract
Premixed lean combustion is vital for reducing NO${}_{x}$ and CO emissions from gas turbine engines, but is prone to thermally induced gas oscillations that can lead to serious engine damage. In coupling two thermoacoustic oscillators, the authors take advantage of the phenomenon of amplitude death to stop the unwanted oscillations completely. Amplitude death is often associated with frequency detuning, but here a combination of time-delay and dissipative couplings allows even a pair of identical oscillators to settle down, for safe operation of e.g. power generators.
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