Introduction: Combustion Dynamics in Lean-Premixed Prevaporized (LPP) Gas Turbines

Large Eddy Simulation of the Sensitivity of Vortex Breakdown and Flame Stabilisation to Axial Forcing

“…The bar in (1)(2)(3)(4)(5) denotes presently the LES-low pass spatial filter which removes the subgrid scale turbulence.…”

“…A recirculation zone directs hot burnt gases (thus heat) towards the fresh ones, allowing operations at very lean conditions with low NOx emissions levels. However, LP flames are susceptible to instabilities and in particular thermo-acoustic instabilities due to coupling between acoustic (pressure) and heat release oscillations [2]. These phenomena are generally referred to as "combustion dynamics", and constitute one of the most challenging areas in combustion research [3].…”

Dynamics and stability of lean-premixed swirl-stabilized combustion

“…LPM combustors have several features that can render them more prone to flow oscillations [17][18][19]. First, the system usually operates near the lean blowout limit.…”

Self-induced instabilities of premixed flames in a multiple injection configuration

“…They are specially dangerous when they occur in high performance propulsion systems [1,2]. Instabilities resulting from the coupling between the flame zone and the combustor acoustics perturb the normal operation and in extreme cases they may lead to disastrous effects [3]. The instability usually involves a resonant feedback between the non-steady release of heat and the systems acoustics [4][5][6].…”