In a thermoacoustic system, such as a flame in a combustor, heat release oscillations couple
with acoustic pressure oscillations. If the heat release is sufficiently in phase with the …

Lean premixed combustion chambers are susceptible to combustion instabilities arising
from the coupling between the heat release rate perturbations and the acoustic …

Thermoacoustic systems can oscillate self-excitedly, and often non-periodically, owing to
coupling between unsteady heat release and acoustic waves. We study a slot-stabilized two …

The thermoacoustic stability of velocity sensitive premixed flames is investigated. A causal
representation of the flow-flame-acoustic interactions reveals a flame-intrinsic feedback …

Flame-acoustic interactions are witnessed in the context of combustion instability in gas
turbine combustors and other propulsion devices, such as rockets, besides confined …

Combustion instability frequently occurs in propulsion and power generation systems. It is
characterized by large-amplitude acoustic oscillations leading to undesirable …

When a premixed flame is placed within a duct, acoustic waves induce velocity perturbations
at the flame's base. These travel down the flame, distorting its surface and modulating its …

In an acoustic cavity with a heat source, such as a flame in a gas turbine, the thermal energy
of the heat source can be converted into acoustic energy, which may generate a loud …

The present study develops an alternative perspective on the response of premixed flames
to flow perturbations. In particular, the linear response of laminar premixed flames to velocity …

Analysis of thermoacoustic instabilities were dominated by modal (eigenvalue) analysis for
many decades. Recent progress in nonmodal stability analysis allows us to study the …