dc.contributor.author | Abid, H | |
dc.contributor.author | Markesteijn, A | |
dc.contributor.author | Karabasov, S | |
dc.contributor.author | Jawahar, H | |
dc.contributor.author | Azarpeyand, M | |
dc.date.accessioned | 2024-06-25T08:54:23Z | |
dc.date.available | 2024-06-07 | |
dc.date.available | 2024-06-25T08:54:23Z | |
dc.date.issued | 2024 | |
dc.identifier.issn | 1573-1987 | |
dc.identifier.uri | https://qmro.qmul.ac.uk/xmlui/handle/123456789/97668 | |
dc.description.abstract | Wall-Modelled Large Eddy Simulations (LES) are conducted using a high-resolution CABARET method, accelerated on Graphics Processing Units (GPUs), for a canonical configuration that includes a flat plate within the linear hydrodynamic region of a single-stream jet. This configuration was previously investigated through experiments at the University of Bristol. The simulations investigate jets at acoustic Mach numbers of 0.5 and 0.9, focusing on two types of nozzle geometries: round and chevron nozzles. These nozzles are scaled-down versions (3:1 scale) of NASA’s SMC000 and SMC006 nozzles. The parameters from the LES, including flow and noise solutions, are validated by comparison with experimental data. Notably, the mean flow velocity and turbulence distribution are compared with NASA’s PIV measurements. Additionally, the near-field and far-field pressure spectra are evaluated in comparison with data from the Bristol experiments. For far-field noise predictions, a range of techniques are employed, ranging from the Ffowcs Williams–Hawkings (FW–H) method in both permeable and impermeable control surface formulations, to the trailing edge scattering model by Lyu and Dowling, which is based on the Amiet trailing edge noise theory. The permeable control surface FW–H solution, incorporating all jet mixing and installation noise sources, is within 2 dB of the experimental data across most frequencies and observer angles for all considered jet cases. Moreover, the impermeable control surface FW–H solution, accounting for some quadrupole noise contributions, proves adequate for accurate noise spectra predictions across all frequencies at larger observer angles. The implemented edge-scattering model successfully captures the mechanism of low-frequency sound amplification, dominant at low frequencies and high observer angles. Furthermore, this mechanism is shown to be effectively consistent for both
and
, and for jets from both round and chevron nozzles. | |
dc.publisher | Springer | en_US |
dc.relation.ispartof | Flow, Turbulence and Combustion | |
dc.rights | This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. | |
dc.subject | Jet installation noise, trailing edge noise scattering, WMLES, GPU CABARET, chevron nozzles | en_US |
dc.title | Jet Installation Noise Modelling for Round and Chevron Jets | en_US |
dc.type | Article | en_US |
dc.rights.holder | © 2024 The Author(s) | |
pubs.notes | Not known | en_US |
pubs.publication-status | Accepted | en_US |
dcterms.dateAccepted | 2024-06-07 | |
rioxxterms.funder | Default funder | en_US |
rioxxterms.identifier.project | Default project | en_US |
qmul.funder | DJINN::European Commission Directorate-General for Research and Innovation | en_US |
qmul.funder | DJINN::European Commission Directorate-General for Research and Innovation | en_US |