Evaluating Source Terms of the Generalized Acoustic Analogy using the Jet Engine Noise REduction (JENRE) Code

Leib, S. J.; Ingraham, Daniel; Bridges, Jackie

doi:10.2514/6.2017-0459

Cited by 9 publications

(6 citation statements)

References 15 publications

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“…have been undertaken. GAA source covariances have also been analysed by Bassetti & Nichols [110] and others [111,112] using jet LES data. As the newly developed methods are evaluated over a wide range of jet flow conditions and geometries, a more clear sense of the benefits of the improved models (including their simplifications) would emerge.…”

Section: Large-eddy Simulations As An Aid To Jet Modellingmentioning

confidence: 99%

Modelling of jet noise: a perspective from large-eddy simulations

Brès

Lele

2019

Phil. Trans. R. Soc. A.

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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 beginning to be used more broadly. A brief overview of the publications since the review by Bodony & Lele (2008, AIAA J. 56 , 346–380) is undertaken to assess the progress and overall contributions of LES towards a better understanding of jet noise. In particular, we stress the meshing, numerical and modelling advances which enable detailed geometric representation of nozzle shape variations intended to impact the noise radiation, and sufficiently accurate capturing of the turbulent boundary layer at the nozzle exit. Examples of how LES is currently being used to complement experiments for challenging conditions (such as highly heated pressure-mismatched jets with afterburners) and guide jet modelling efforts are highlighted. Some of the physical insights gained from these numerical studies are discussed, in particular on crackle, screech and shock-associated noise, impingement tones, acoustic analogy models, wavepackets dynamics and resonant acoustic waves within the jet core. We close with some perspectives on the remaining challenges and upcoming opportunities for future applications. This article is part of the theme issue ‘Frontiers of aeroacoustics research: theory, computation and experiment’.

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Section: Large-eddy Simulations As An Aid To Jet Modellingmentioning

confidence: 99%

Modelling of jet noise: a perspective from large-eddy simulations

Brès

Lele

2019

Phil. Trans. R. Soc. A.

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“…The auto-covariance functions of the generalised fluctuating Reynolds stress tensor, which corresponds to the effective noise sources of the Goldstein acoustic analogy, are shown both experimentally 15,16 and computationally 1,17,18 to collapse to similitude curves for a wide range of jet Mach numbers when non-dimensionalised appropriately.…”

Section: Introductionmentioning

confidence: 97%

Similarity scaling of jet noise sources for low-order jet noise modelling based on the Goldstein generalised acoustic analogy

Semiletov

Karabasov

2017

International Journal of Aeroacoustics

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Article Number: 730457 Thank you for choosing to publish with us. This is your final opportunity to ensure your article will be accurate at publication. Please review your proof carefully and respond to the queries using the circled tools in the image below, which are available by clicking ''Comment'' from the right-side menu in Adobe Reader DC.* Please use only the tools circled in the image, as edits via other tools/methods can be lost during file conversion. For comments, questions, or formatting requests, please use. Please do not use comment bubbles/sticky notes. Comment *If you do not see these tools, please ensure you have opened this file with Adobe Reader DC, available for free at get.adobe.com/reader or by going to Help > Check for Updates within other versions of Reader. For more detailed instructions, please see us.sagepub.com/ReaderXProofs. No. Query Please confirm that all author information, including names, affiliations, sequence, and contact details, is correct. Please review the entire document for typographical errors, mathematical errors, and any other necessary corrections; check headings, tables, and figures. Please confirm that the Funding and Conflict of Interest statements are accurate. Please ensure that you have obtained and enclosed all necessary permissions for the reproduction of artistic works, (e.g. illustrations, photographs, charts, maps, other visual material, etc.) not owned by yourself. Please refer to your publishing agreement for further information. Please note that this proof represents your final opportunity to review your article prior to publication, so please do send all of your changes now. AQ: 1 Per journal style, abstracts should not have reference citations. Therefore, year '2015' after the reference citation 'Semiletov et al.' has been deleted.

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“…For example, [8] and [19] showed that the difference between applying the realistic unsteady inflow condition and the simple initial laminar inflow condition could be very large (O(5dB) in terms of the far-field noise spectra) for the jet flows they considered. On the other hand, for other high-speed jet flows such as considered by [7] or in case of [13] and [14], who considered the same SMC000 nozzle geometry as in the current article, there were laminar inflow conditions used which didn't lead to a drastic deterioration of the solution accuracy compared to the experiment either in terms of the far-field noise spectra or noise-sensitive jet flow properties such as the fourth-order velocity correlations.…”

Section: Introductionmentioning

confidence: 98%

“…The flow conditions inside the nozzle were not recorded and the experimental data available include the flow Particle Image Velocimetry (PIV) and the far-field microphone measurement data. Thanks to the availability of both the flow data and the far-field acoustic measurement, the SHJAR database has already attracted attention for validation of LES methods [12][13][14] as well as hybrid Rynolds Averaged Navier Stokes (RANS)-LES approaches [15][16][17].…”

Section: Introductionmentioning

confidence: 99%