Flow over a Wing with Leading-Edge Undulations
The stall-delaying properties of the humpback whale flipper have been observed and quantified in recent years, through both experimental and numerical studies. In the present work, numerical simulations of an infinite-span wing with an idealized representation of this geometry are reported at a Reyn...
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Online Access: | https://research.manchester.ac.uk/en/publications/4ba62fd6-926b-426d-9b16-21d4bb7e65d9 https://doi.org/10.2514/1.J053142 |
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ftumanchesterpub:oai:pure.atira.dk:publications/4ba62fd6-926b-426d-9b16-21d4bb7e65d9 2023-11-12T04:18:19+01:00 Flow over a Wing with Leading-Edge Undulations Skillen, A. Revell, A. Pinelli, A. Piomelli, U. Favier, J. 2014-01-07 https://research.manchester.ac.uk/en/publications/4ba62fd6-926b-426d-9b16-21d4bb7e65d9 https://doi.org/10.2514/1.J053142 eng eng info:eu-repo/semantics/closedAccess Skillen , A , Revell , A , Pinelli , A , Piomelli , U & Favier , J 2014 , ' Flow over a Wing with Leading-Edge Undulations ' , A I A A Journal , vol. 53 , no. 2 , pp. 464-472 . https://doi.org/10.2514/1.J053142 article 2014 ftumanchesterpub https://doi.org/10.2514/1.J053142 2023-10-30T09:10:50Z The stall-delaying properties of the humpback whale flipper have been observed and quantified in recent years, through both experimental and numerical studies. In the present work, numerical simulations of an infinite-span wing with an idealized representation of this geometry are reported at a Reynolds number of 1.2×105. Using large-eddy simulation, an adequate spatial resolution is first established before also examining the spanwise extent of the domain. These results are then analyzed to provide an explanation of the conditions that drive the lift observed beyond the conventional stall angle. The undulating leading-edge geometry gives rise to a spanwise pressure gradient that drives a secondary flow toward the regions of minimum chord. In turn, this leads to the entrainment of higher-momentum fluid into the region behind the maximum chord, which energizes the boundary layer and delays stall. Aside from demonstrating a significant poststall lift, the undulations also have the added benefit of substantially reducing lift fluctuations. Article in Journal/Newspaper Humpback Whale The University of Manchester: Research Explorer AIAA Journal 53 2 464 472 |
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Open Polar |
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The University of Manchester: Research Explorer |
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ftumanchesterpub |
language |
English |
description |
The stall-delaying properties of the humpback whale flipper have been observed and quantified in recent years, through both experimental and numerical studies. In the present work, numerical simulations of an infinite-span wing with an idealized representation of this geometry are reported at a Reynolds number of 1.2×105. Using large-eddy simulation, an adequate spatial resolution is first established before also examining the spanwise extent of the domain. These results are then analyzed to provide an explanation of the conditions that drive the lift observed beyond the conventional stall angle. The undulating leading-edge geometry gives rise to a spanwise pressure gradient that drives a secondary flow toward the regions of minimum chord. In turn, this leads to the entrainment of higher-momentum fluid into the region behind the maximum chord, which energizes the boundary layer and delays stall. Aside from demonstrating a significant poststall lift, the undulations also have the added benefit of substantially reducing lift fluctuations. |
format |
Article in Journal/Newspaper |
author |
Skillen, A. Revell, A. Pinelli, A. Piomelli, U. Favier, J. |
spellingShingle |
Skillen, A. Revell, A. Pinelli, A. Piomelli, U. Favier, J. Flow over a Wing with Leading-Edge Undulations |
author_facet |
Skillen, A. Revell, A. Pinelli, A. Piomelli, U. Favier, J. |
author_sort |
Skillen, A. |
title |
Flow over a Wing with Leading-Edge Undulations |
title_short |
Flow over a Wing with Leading-Edge Undulations |
title_full |
Flow over a Wing with Leading-Edge Undulations |
title_fullStr |
Flow over a Wing with Leading-Edge Undulations |
title_full_unstemmed |
Flow over a Wing with Leading-Edge Undulations |
title_sort |
flow over a wing with leading-edge undulations |
publishDate |
2014 |
url |
https://research.manchester.ac.uk/en/publications/4ba62fd6-926b-426d-9b16-21d4bb7e65d9 https://doi.org/10.2514/1.J053142 |
genre |
Humpback Whale |
genre_facet |
Humpback Whale |
op_source |
Skillen , A , Revell , A , Pinelli , A , Piomelli , U & Favier , J 2014 , ' Flow over a Wing with Leading-Edge Undulations ' , A I A A Journal , vol. 53 , no. 2 , pp. 464-472 . https://doi.org/10.2514/1.J053142 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.2514/1.J053142 |
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AIAA Journal |
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