Aeroacoustic resonance and self-excitation in screeching and impinging supersonic jets–a review

D Edgington-Mitchell - International Journal of Aeroacoustics, 2019 - journals.sagepub.com
Supersonic jets, particularly shock-containing jets, often exhibit high-intensity, discrete-
frequency acoustic tones. These tones are the signature of an aeroacoustic resonance loop …

Wave-packet models for jet dynamics and sound radiation

AVG Cavalieri, P Jordan… - Applied …, 2019 - asmedigitalcollection.asme.org
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 …

Spectral analysis of jet turbulence

OT Schmidt, A Towne, G Rigas, T Colonius… - Journal of Fluid …, 2018 - cambridge.org
Informed by large-eddy simulation (LES) data and resolvent analysis of the mean flow, we
examine the structure of turbulence in jets in the subsonic, transonic and supersonic …

Wavepackets and trapped acoustic modes in a turbulent jet: coherent structure eduction and global stability

OT Schmidt, A Towne, T Colonius… - Journal of Fluid …, 2017 - cambridge.org
Coherent features of a turbulent Mach 0.9, Reynolds number jet are educed from a high-
fidelity large eddy simulation. Besides the well-known Kelvin–Helmholtz instabilities of the …

Lift-up, Kelvin–Helmholtz and Orr mechanisms in turbulent jets

E Pickering, G Rigas, PAS Nogueira… - Journal of Fluid …, 2020 - cambridge.org
Three amplification mechanisms present in turbulent jets, namely lift-up, Kelvin–Helmholtz
and Orr, are characterized via global resolvent analysis and spectral proper orthogonal …

Resolvent-based modeling of coherent wave packets in a turbulent jet

L Lesshafft, O Semeraro, V Jaunet, AVG Cavalieri… - Physical Review …, 2019 - APS
Coherent turbulent wave-packet structures in a jet at Reynolds number 460 000 and Mach
number 0.4 are extracted from experimental measurements and are modeled as linear …

Large-scale streaky structures in turbulent jets

PAS Nogueira, AVG Cavalieri, P Jordan… - Journal of Fluid …, 2019 - cambridge.org
Streaks have been found to be an important part of wall-turbulence dynamics. In this paper,
we extend the analysis for unbounded shear flows, in particular a Mach 0.4 round jet, using …

Self-similar mechanisms in wall turbulence studied using resolvent analysis

U Karban, E Martini, AVG Cavalieri… - Journal of Fluid …, 2022 - cambridge.org
Self-similarity of wall-attached coherent structures in a turbulent channel at is explored by
means of resolvent analysis. In this modelling framework, coherent structures are …

Efficient global resolvent analysis via the one-way Navier–Stokes equations

A Towne, G Rigas, O Kamal, E Pickering… - Journal of Fluid …, 2022 - cambridge.org
Resolvent analysis is a powerful tool for modelling and analysing transitional and turbulent
flows and, in particular, for approximating coherent flow structures. Despite recent …

Resolvent-based estimation of turbulent channel flow using wall measurements

FR Amaral, AVG Cavalieri, E Martini… - Journal of Fluid …, 2021 - cambridge.org
We employ a resolvent-based methodology to estimate velocity and pressure fluctuations
within turbulent channel flows at friction Reynolds numbers of approximately 180, 550 and …