The unsteady response of a flame to acoustic or flow perturbations plays a crucial role in
thermoacoustic combustion instability. The majority of studies on this subject presents and …

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

Despite significant research, self-excited thermoacoustic oscillations continue to hinder the
development of lean-premixed gas turbines, making the early detection of such oscillations …

A hybrid computational fluid dynamics (CFD)/computational aero-acoustics (CAA) approach,
in which large-eddy simulation (LES) and APE-RF (solution of the acoustic perturbation …

Featured Application Stable design of Combustor in industrial boiler and burner. Abstract
The response of flames' heat release to acoustic excitation is a critical factor for …

While lean combustion in gas turbines is known to reduce NOx, it makes combustors more
prone to thermo-acoustic instabilities, which can lead to deterioration in engine …

Combustion instability is one significant issue in the development of aero-engines and gas
turbines. In practical combustors, the exit boundary of the combustion chamber is complex …

We derive and numerically validate a low-order oscillator model to capture the stochastic
dynamics of a prototypical thermoacoustic system (a Rijke tube) undergoing a subcritical …

Reducing the level of noise emission is an important requirement in modern propulsion and
power generation. This requires gaining a deeper understanding of the underlying physics …

In this study, we theoretically investigate the impact of outlet boundary conditions and mean
temperature gradients on the maximum transient growth rate of acoustical energy and the …