Combustion noise comprises two components: direct combustion noise and indirect
combustion noise. The latter is the lesser studied, with entropy noise believed to be its main …

This paper presents recent progress in the field of thermoacoustic combustion instabilities in
propulsion engines such as rockets or gas turbines. Combustion instabilities have been …

This article describes recent progress on premixed flame dynamics interacting with acoustic
waves. Expressions are derived to determine the stability of combustors with respect to …

Recent studies [Hoeijmakers et al. 2014, Emmert et al. 2015] suggest that thermoacoustic
modes can appear in combustors with anechoic terminations, which have no acoustic …

Progress in analytical methods to predict and control azimuthal combustion instability
modes in annular chambers | Physics of Fluids | AIP Publishing Skip to Main Content …

In analytical models of the propagation and generation of acoustic and entropy waves
across a premixed flame, the relations that couple upstream and downstream flow variables …

It is conventionally believed that there are no self-sustained thermoacoustic oscillations in
the absence of acoustic modes in combustors. However, such oscillations (also known as …

Many physical problems containing rotating symmetry exhibit azimuthal waves, from
electromagnetic waves in nanophotonic crystals to seismic waves in giant stars. When this …

This work demonstrates that a hybrid approach for linear thermoacoustic stability analysis
that combines the Linearized Navier–Stokes Equations (LNSE) with a global Flame Transfer …

Entropy waves play an important role in the production of indirect combustion noise and
thermoacoustic instability. The characteristics of entropy waves from swirling flames have …