15 - Guest lectures

THERMOACOUSTIC INSTABILITY IN AERO-ENGINE COMBUSTORS

A. Morgans, United Kingdom

Thermoacoustic instability is caused by a two-way coupling between acoustic waves and flame unsteadiness, and its resulting large amplitude oscillations can cause catastrophic damage. It can occur in the combustors of aero-engines, power gas turbines, rocket engines, domestic boilers etc. The transition to sustainable fuels may result in increased propensity to thermoacoustic instability, with designing it out being a key enabling technology. This talk will present the background and importance of thermoacoustic instability in aero-engine combustors, followed by research progress made through two European Research Council grants on the topic (ERC Starting Grant ACOULOMODE 2013-18 and ERC Consolidator Grant AFIRMATIVE 2018-23).

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