Recent developments in numerical schemes, turbulent combustion models and the regular
increase of computing power allow Large Eddy Simulation (LES) to be applied to real …

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 …

The acoustic and entropy transfer functions of quasi-one-dimensional nozzles are studied
analytically for both subsonic and choked flows with and without shock waves. The present …

The implementation of advanced low-emission aircraft engine technologies and the
reduction of noise from airframe, fan, and jet exhaust have made noise contributions from an …

Thermoacoustic instability is a flow instability that arises due to a two-way coupling between
acoustic waves and unsteady heat release rate. It can cause damaging, large-amplitude …

This paper considers the effect of flow advection on entropy waves. The interest is in
whether entropy waves persist in gas turbine combustors, between the flame, where they …

Survival of entropy waves during their advection throughout a combustor is central to the
generation of entropic sound and the subsequent effects upon thermoacoustic stability of the …

An analysis is made of the noise generated during the passage of quiescent
temperature/entropy inhomogeneities through regions of rapidly accelerated mean flow …

A large-eddy simulation (LES) of a next-generation combustor is performed to examine
effects of this combustor concepts on direct and indirect combustion noise characteristics …