Transverse combustion instabilities: Acoustic, fluid mechanic, and flame processes

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Thermoacoustic Instability Considerations for High Hydrogen Combustion in Lean Premixed Gas Turbine Combustors: A Review (2021, background): “All practical combustors incorporate some form of acoustic damping such that the value of the integral in Equation (1) must exceed the damping integrated over the system volume for instability to occur [49].”
Sensitivity and Nonlinearity of Thermoacoustic Oscillations (2018, background): “F or p er so na l u se o nl y. (Worth & Dawson 2013, Bourgouin et al. 2015, O’Connor et al. 2015, Bauerheim et al. 2016), and (e) computational fluid dynamics (CFD) (Poinsot 2017).”
Dynamics and control of premixed combustion systems based on flame transfer and describing functions (2020, background): “Direct effects of the transverse acoustic field were shown to lead to limited high frequency heat release disturbances (Baillot & Lespinasse 2013; O’Connor et al. 2015) that cannot explain the low frequency and large self-sustained combustion oscillations coupled by azimuthal modes observed in many ”
Advances in rapid compression machine studies of low- and intermediate-temperature autoignition phenomena (2017, neutral): “A significant database for physical-chemical interactions covering a range of engine-relevant conditions has been developed through the use of steady flow / constant pressure devices like burners and [49,50].”