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 …

A coupled numerical approach is investigated for predicting combustion instability limit cycle
characteristics when the combustor contains a long flame. The test case is the ORACLES …

Thermoacoustic instabilities in annular gas turbine combustors often involve modes which
vary in both the longitudinal and circumferential directions. Recent experimental studies …

The excitation mechanism of a thermoacoustic instability in a 42-element research rocket
thrust chamber with representative operating conditions with respect to European cryogenic …

Aeroacoustics damping performance of an in-duct perforated orifice with a bias flow in terms
of acoustic power absorption Δ and reflection χ coefficients are evaluated in this work. For …

Acoustic liner is generally adopted to damp noise in aero-engines and gas turbines. This
paper presents a systematic study about the effects of an acoustic liner on thermoacoustic …

Helmholtz resonators (HRs) are widely used to damp acoustic oscillations, including in the
combustors of aero-engines and power gas turbines where they damp thermoacoustic …

We study the unsteady flow of a viscous fluid passing through a circular aperture in a plate
characterized by a non-zero thickness. We investigate this problem by solving the …

The acoustic impedance of perforated plates is influenced by fluid flow through the orifice.
The present study employs the three-dimensional (3-D) time-domain computational fluid …

This work presents a three dimensional, reduced order model of the dynamics of an
acoustically compact aperture, subject to an arbitrary pressure forcing. It provides the time …