Academic Journal
Leading edge serrations for the reduction of aerofoil self-noise at low angle of attack, pre-stall and post-stall conditions
| العنوان: | Leading edge serrations for the reduction of aerofoil self-noise at low angle of attack, pre-stall and post-stall conditions |
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| المؤلفون: | Lacagnina, G, Chaitanya, P, Kim, JH, Berk, T, Joseph, P, Choi, KS, Ganapathisubramani, B, Hasheminejad, SM, Chong, TP, Stalnov, O, Shahab, MF, Omidyeganeh, M, Pinelli, A |
| سنة النشر: | 2021 |
| المجموعة: | Brunel University London: Brunel University Research Archive (BURA) |
| مصطلحات موضوعية: | stall noise, leading edge serrations, noise reductions, aerofoil self-noise |
| الوصف: | Copyright © The Author(s) 2021. This paper addresses the usefulness of leading edge serrations for reducing aerofoil self-noise over a wide range of angles of attack. Different serration geometries are studied over a range of Reynolds number (Re≈2⋅105 − 4⋅105). Design guidelines are proposed that permit noise reductions over most angles of attack. It is shown that serration geometries reduces the noise but adversely effect the aerodynamic performance suggesting that a trade-off should be sought between these two considerations. The self-noise performance of leading edge serrations has been shown to fall into three angle of attack (AoA) regimes: low angles where the flow is mostly attached, moderate angles where the flow is partially to fully separated, and high angles of attack where the flow is fully separated. Leading edge serrations have been demonstrated to be effective in reducing noise at low and high angles of attack but ineffective at moderate angles. The noise reduction mechanisms are explored in each of three angle regimes. ; EPSRC Research Grant No: EP/N020413/1 on the “Quiet Aerofoils of the Next Generation”. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | 130 - 156; Print-Electronic |
| اللغة: | English |
| تدمد: | 1475-472X 2048-4003 |
| Relation: | International Journal of Aeroacoustics; ORCID iDs: Giovanni Lacagnina - orcid:0000-0002-8038-1127; Paruchuri Chaitanya - orcid:0000-0001-8812-8778; Kwing-So Choi - orcid:0000-0002-8383-8057; Seyed Mohammad Hasheminejad - orcid:0000-0002-7717-0820.; Lacagnina, G., Chaitanya, P., Kim, J.H., Berk, T., Joseph, P., Choi, K.S., Ganapathisubramani, B., Hasheminejad, S.M., Chong, T.P., Stalnov, O., Shahab, M.F., Omidyeganeh, M. and Pinelli, A. (2021) 'Leading edge serrations for the reduction of aerofoil self-noise at low angle of attack, pre-stall and post-stall conditions', International Journal of Aeroacoustics, 20 (1-2), pp. 130 - 156. doi:10.1177/1475472X20978379.; https://bura.brunel.ac.uk/handle/2438/21470; https://doi.org/10.1177/1475472X20978379 |
| DOI: | 10.1177/1475472X20978379 |
| الاتاحة: | https://bura.brunel.ac.uk/handle/2438/21470 https://doi.org/10.1177/1475472X20978379 |
| Rights: | Copyright © The Author(s) 2021. This article is distributed under the terms of the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage). ; https://creativecommons.org/licenses/by/4.0/ ; The Author(s) |
| رقم الانضمام: | edsbas.EA90665 |
| قاعدة البيانات: | BASE |
| تدمد: | 1475472X 20484003 |
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| DOI: | 10.1177/1475472X20978379 |