Closed-loop turbulence control: Progress and challenges

SL Brunton, BR Noack - Applied Mechanics …, 2015 - asmedigitalcollection.asme.org
Closed-loop turbulence control is a critical enabler of aerodynamic drag reduction, lift
increase, mixing enhancement, and noise reduction. Current and future applications have …

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 …

Unstructured large-eddy simulations of supersonic jets

GA Bres, FE Ham, JW Nichols, SK Lele - AIAA journal, 2017 - arc.aiaa.org
Experience gained from previous jet noise studies with the unstructured large-eddy
simulation flow solver “Charles” is summarized and put to practice for the predictions of …

Modal analysis of acoustic directivity in turbulent jets

A Nekkanti, OT Schmidt - AIAA journal, 2021 - arc.aiaa.org
The directivity of noise from three large-eddy simulations of turbulent jets at Mach 0.7, 0.9,
and 1.5 is investigated using spectral proper orthogonal decomposition (SPOD). The most …

Wavepacket models for supersonic jet noise

A Sinha, D Rodríguez, GA Brès… - Journal of Fluid …, 2014 - cambridge.org
Gudmundsson and Colonius (J. Fluid Mech., vol. 689, 2011, pp. 97–128) have recently
shown that the average evolution of low-frequency, low-azimuthal modal large-scale …

A study of noise reduction mechanisms of jets with fluid inserts

C Prasad, PJ Morris - Journal of Sound and Vibration, 2020 - Elsevier
The fluid insert technology is an active noise reduction technique that has been shown to
successfully reduce supersonic jet noise in model scale nozzles. The goal of this paper is to …

[HTML][HTML] Resolvent-based modeling of turbulent jet noise

E Pickering, A Towne, P Jordan… - The Journal of the …, 2021 - pubs.aip.org
Resolvent analysis has demonstrated encouraging results for modeling coherent structures
in jets when compared against their data-educed counterparts from high-fidelity large-eddy …

Similarity spectra analysis of high-performance jet aircraft noise

TB Neilsen, KL Gee, AT Wall, MM James - The Journal of the …, 2013 - pubs.aip.org
Noise measured in the vicinity of an F-22A Raptor has been compared to similarity spectra
found previously to represent mixing noise from large-scale and fine-scale turbulent …

Wavepacket models for supersonic twin-jets

D Rodriguez - AIAA Aviation 2021 Forum, 2021 - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2021-2121. vid Twin-jet configurations,
composed of two jets placed in close proximity to each other, are a common feature of many …

Triangular tabs for supersonic jet mixing enhancement

A Kumar, E Rathakrishnan - The Aeronautical Journal, 2014 - cambridge.org
The mixing promoting capability of right-angled triangular tab with sharp and truncated
vertex has been investigated by placing two identical tabs at the exit of a Mach 2 axi …