Overview of the Use of Large-Eddy Simulations in Jet Aeroacoustics

Lyrintzis, Anastasios S.; Coderoni, Marco

doi:10.2514/1.j058498

Cited by 24 publications

(13 citation statements)

References 214 publications

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“…Considerable advancements have been made in the last few years in the field of jet aeroacoustics, as highlighted in the reviews of Brès & Lele (2019) and Lyrintzis & Coderoni (2020) on jet noise prediction and modelling using large-eddy simulations, and that of Edgington-Mitchell (2019) on aeroacoustic resonance and self-excitation in supersonic jets, for instance. They have provided new insights into jet flow and noise generation mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Acoustic tones in the near-nozzle region of jets: characteristics and variations between Mach numbers 0.5 and 2

Bogey

2021

J. Fluid Mech.

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Section: Introductionmentioning

confidence: 99%

Acoustic tones in the near-nozzle region of jets: characteristics and variations between Mach numbers 0.5 and 2

Bogey

2021

J. Fluid Mech.

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“…A survey of all aspects of the application of LES to jet aeroacoustics has been provided by Lyrintzis and Coderoni [48]. For the current purposes, it is sufficient to note that two techniques for propagation to the far field have been considered.…”

Section: Aeroacoustic Aspectsmentioning

confidence: 99%

“…The SPIV data revealed significant values of many components of R ij,kl (x, η, τ ). The 81 components of the fourth-order tensor reduce with symmetry to 36, all of which were measured in Ref 48…”

mentioning

confidence: 99%

Propulsive jet aerodynamics and aeroacoustics

McGuirk

2021

Aeronaut. j.

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Comprehensive understanding of propulsive jet aerodynamics and aeroacoustics is key to engine design for reduced jet noise and infra-red signature in civil and military aerospace, respectively. Illustrated examples are provided of other aerodynamic/aeroacoustic problems involving jet development, including chevron nozzles, increased jet/wing/flap interference (as fan diameter increases), high acoustic environment (and potentially damaging screech) of supersonic jets on carrier decks and the strongly Three-Dimensional (3D) unsteady flow during the in-ground effect operation of Short Take-Off and Vertical Landing (STOVL) aircraft. To date, laboratory/rig test measurements have primarily been used to identify design solutions; increased use of Computational Fluid Dynamics (CFD) would help achieve cost/time reductions, but Reynolds-Average Navier–Stokes (RANS) CFD with statistical turbulence modelling has proven inadequate for such flows. The scenarios described are far removed from flows used to calibrate model constants, and predictive accuracy demands detailed insight into unsteady flow. Large-Eddy Simulation (LES), whilst computationally more demanding, offers a potential solution. Research undertaken to assess LES capability to address the challenges described is reviewed here. This demonstrates that tremendous progress has been made, indicating that LES can provide sufficiently accurate predictions, representing high value for engineering design. A series of validation studies of increasing realism to practical engineering systems is presented to underpin this conclusion. Finally, areas for further work are suggested to support the combined application of RANS and LES that is probably the optimum way forward.

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“…A detailed review on the application of LES for jet-noise prediction is provided by Lyrintzis and Coderoni. 6 Rego et al. 7 used Lattice-Boltzmann method to study noise amplification effects due to jet-surface interaction.…”

Section: Introductionmentioning

confidence: 99%

A proposed wavy shield for suppression of supersonic jet noise utilizing reflections

Mankbadi

Salehian

2021

International Journal of Aeroacoustics

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In this work we propose replacing the conventional flat-surface airframe that shields the engine by a wavy surface. The basic principle is to design a wavy pattern to reflect the incoming near-field flow and acoustic perturbations into waves of a particular dominant frequency. The reflected waves will then excite the corresponding frequency of the large-scale structure in the initial region of the jet’s shear layer. By designing the frequency of the reflected waves to be the harmonic of the fundamental frequency that corresponds to the radiated peak noise, the two frequency-modes interact nonlinearly. With the appropriate phase difference, the harmonic dampens the fundamental as it extracts energy from it to amplify. The outcome is a reduction in the peak noise. To evaluate this concept, we conducted Detached Eddy Simulations for a rectangular supersonic jet with and without the wavy shield and verified our numerical results with experimental data for a free jet, as well as, for a jet with an adjacent flat surface. Results show that the proposed wavy surface reduces the jet noise as compared to that of the corresponding flat surface by as much as 4 dB.

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Overview of the Use of Large-Eddy Simulations in Jet Aeroacoustics

Cited by 24 publications

References 214 publications

Acoustic tones in the near-nozzle region of jets: characteristics and variations between Mach numbers 0.5 and 2

Acoustic tones in the near-nozzle region of jets: characteristics and variations between Mach numbers 0.5 and 2

Propulsive jet aerodynamics and aeroacoustics

A proposed wavy shield for suppression of supersonic jet noise utilizing reflections

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