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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American Institute of Aeronautics and Astronautics
2015
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ftcityunivlondon:oai:openaccess.city.ac.uk:14267 2023-07-02T03:32:32+02:00 Flow over a Wing with Leading-Edge Undulations Skillen, A. Revell, A. Pinelli, A. Piomelli, U. Favier, J. 2015-02-01 text https://openaccess.city.ac.uk/id/eprint/14267/ https://openaccess.city.ac.uk/id/eprint/14267/1/Flow%20over%20a%20Wing%20with%20Leading-Edge%20Undulations.pdf https://doi.org/10.2514/1.J053142 en eng American Institute of Aeronautics and Astronautics https://openaccess.city.ac.uk/id/eprint/14267/1/Flow%20over%20a%20Wing%20with%20Leading-Edge%20Undulations.pdf Skillen, A., Revell, A., Pinelli, A. https://openaccess.city.ac.uk/view/creators_id/alfredo=2Epinelli=2E1.html , Piomelli, U. Favier, J.view all authorsEPJS_limit_names_shown_load( 'creators_name_14267_et_al', 'creators_name_14267_rest' ); (2015). Flow over a Wing with Leading-Edge Undulations. AIAA Journal, 53(2), pp. 464-472. doi:10.2514/1.J053142 https://doi.org/10.2514/1.J053142 doi:10.2514/1.J053142 TL Motor vehicles. Aeronautics. Astronautics Article PeerReviewed 2015 ftcityunivlondon https://doi.org/10.2514/1.J053142 2023-06-13T18:33:37Z 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 1.2×10(to the power of 5). 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 City University London: City Research Online AIAA Journal 53 2 464 472 |
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Open Polar |
collection |
City University London: City Research Online |
op_collection_id |
ftcityunivlondon |
language |
English |
topic |
TL Motor vehicles. Aeronautics. Astronautics |
spellingShingle |
TL Motor vehicles. Aeronautics. Astronautics Skillen, A. Revell, A. Pinelli, A. Piomelli, U. Favier, J. Flow over a Wing with Leading-Edge Undulations |
topic_facet |
TL Motor vehicles. Aeronautics. Astronautics |
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 1.2×10(to the power of 5). 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. |
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 |
publisher |
American Institute of Aeronautics and Astronautics |
publishDate |
2015 |
url |
https://openaccess.city.ac.uk/id/eprint/14267/ https://openaccess.city.ac.uk/id/eprint/14267/1/Flow%20over%20a%20Wing%20with%20Leading-Edge%20Undulations.pdf https://doi.org/10.2514/1.J053142 |
genre |
Humpback Whale |
genre_facet |
Humpback Whale |
op_relation |
https://openaccess.city.ac.uk/id/eprint/14267/1/Flow%20over%20a%20Wing%20with%20Leading-Edge%20Undulations.pdf Skillen, A., Revell, A., Pinelli, A. https://openaccess.city.ac.uk/view/creators_id/alfredo=2Epinelli=2E1.html , Piomelli, U. Favier, J.view all authorsEPJS_limit_names_shown_load( 'creators_name_14267_et_al', 'creators_name_14267_rest' ); (2015). Flow over a Wing with Leading-Edge Undulations. AIAA Journal, 53(2), pp. 464-472. doi:10.2514/1.J053142 https://doi.org/10.2514/1.J053142 doi:10.2514/1.J053142 |
op_doi |
https://doi.org/10.2514/1.J053142 |
container_title |
AIAA Journal |
container_volume |
53 |
container_issue |
2 |
container_start_page |
464 |
op_container_end_page |
472 |
_version_ |
1770272126772707328 |