Organized structures in turbulent jets can be modeled as wavepackets. These are
characterized by spatial amplification and decay, both of which are related to stability …

In the last decade, many research groups have reported predictions of jet noise using high-
fidelity large-eddy simulations (LES) of the turbulent jet flow and these methods are …

This paper describes the mechanism underpinning modal staging behaviour in screeching
jets. An upstream-propagating subsonic guided-jet mode is shown to be active in all stages …

The interaction between various wave-like structures in screeching jets is considered via
both experimental measurements and linear stability theory. Velocity snapshots of …

Acoustic tones in the near-nozzle region of jets: characteristics and variations between Mach
numbers 0.5 and 2 Page 1 J. Fluid Mech. (2021), vol. 921, A3, doi:10.1017/jfm.2021.426 …

The effects of perturbation-based active flow control on supersonic rectangular twin jets
(SRTJ) over a wide range of nozzle pressure ratios (NPR= 2.77 to 6.7, corresponding to fully …

The purpose of this paper is to characterise and model the A1 and A2 screech modes in
supersonic jets operating at off-design conditions. The usual screech-modelling scenario …

Guided-jet waves have been shown to close resonance loops in a myriad of problems such
as screech and impingement tones in jets. These discrete, upstream-travelling waves have …

This paper explores the screech closure mechanism for different axisymmetric modes in
shock-containing jets. While many of the discontinuities in tonal frequency exhibited by …

The interactions between upstream-propagating guided jet waves and shear-layer instability
waves near the nozzle of subsonic and nearly ideally expanded supersonic, isothermal free …