Optimization of leading-edge undulation of a NACA 65(12)-10 aerofoil for noise reduction and aerodynamic enhancement
Copyright © 2019 The Author(s). Leading-edge undulations or tubercles of humpback whale flippers have been known as one of biomimetic technologies adaptable to flow control of aerofoils, particularly at post stall conditions. These leading-edge undulations are also known to reduce noise resulting fr...
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ftbruneluniv:oai:bura.brunel.ac.uk:2438/25055 2023-05-15T16:36:05+02:00 Optimization of leading-edge undulation of a NACA 65(12)-10 aerofoil for noise reduction and aerodynamic enhancement Kim, JH Choi, KS Lacagnina, G Joseph, P Hasheminejad, SM Chong, TP Shahab, MF Omidyeganeh, M Pinelli, A 2019-09-09 5351 - 5358 https://bura.brunel.ac.uk/handle/2438/25055 https://doi.org/10.18154/RWTH-CONV-239781 en_US eng RWTH Aachen University Proceedings of the International Congress on Acoustics Choi, K.-S., Kim, J.-H., Lacagnina, G., Joseph, P., Hasheminejad, S.M., Chong, T.P., Shahab, M.F., Omidyeganeh, M. and Pinelli, A. (2019) 'Optimization of leading-edge undulation of a NACA 65(12)-10 aerofoil for noise reduction and aerodynamic enhancement', in: Ochmann, M., Vorländer, M. and Fels, J. (eds.) Proceedings of the 23rd International Congress on Acoustics : integrating 4th EAA Euroregio 2019, Aachen, Germany, 9-13 September 2019, 2019-September pp. 5351 - 5358. doi:10.18154/RWTH-CONV-239781. 9783939296157 2226-7808 https://bura.brunel.ac.uk/handle/2438/25055 https://doi.org/10.18154/RWTH-CONV-239781 2415-1599 Copyright © 2019 The Author(s). Published and hosted by RWTH Aachen University under a Creative Commons (CC BY-NC-SA) Attribution License (https://creativecommons.org/licenses/by-nc-sa/4.0/). https://creativecommons.org/licenses/by-nc-sa/4.0/ CC-BY-NC-SA CC-BY leading-edge undulation NACA 65(12)-10 lift drag noise Conference Paper 2019 ftbruneluniv https://doi.org/10.18154/RWTH-CONV-239781 2022-08-11T22:43:57Z Copyright © 2019 The Author(s). Leading-edge undulations or tubercles of humpback whale flippers have been known as one of biomimetic technologies adaptable to flow control of aerofoils, particularly at post stall conditions. These leading-edge undulations are also known to reduce noise resulting from an interaction with on-coming turbulence. We have recently carried out a parametric study of a NACA 65(12)-10 aerofoil with a view to optimise the amplitude and the wavelength of leading-edge undulations for noise reduction and aerodynamic enhancement. A 3x3 test matrix composing of three amplitudes (h = 3%, 6% and 12% chord) and three wavelengths (? = 10%, 20% and 30% chord) was used in the investigation, where lift, drag and noise were measured at the Reynolds number of 105. In this test, a turbulence-generating grid was installed at the inlet of the test section to increase the turbulence level in the freestream and to promote transition to turbulence near the leading edge of aerofoils without a need for a trip device. Within the test matrix considered, we found that the best improvement in CL,max is given with the greatest wavelength and amplitude, whereas the maximum noise reduction is obtained with the small wavelength and the large amplitude. EPSRC (Grant Number EP/N018486/1) in the UK. Conference Object Humpback Whale Brunel University London: Brunel University Research Archive (BURA) |
institution |
Open Polar |
collection |
Brunel University London: Brunel University Research Archive (BURA) |
op_collection_id |
ftbruneluniv |
language |
English |
topic |
leading-edge undulation NACA 65(12)-10 lift drag noise |
spellingShingle |
leading-edge undulation NACA 65(12)-10 lift drag noise Kim, JH Choi, KS Lacagnina, G Joseph, P Hasheminejad, SM Chong, TP Shahab, MF Omidyeganeh, M Pinelli, A Optimization of leading-edge undulation of a NACA 65(12)-10 aerofoil for noise reduction and aerodynamic enhancement |
topic_facet |
leading-edge undulation NACA 65(12)-10 lift drag noise |
description |
Copyright © 2019 The Author(s). Leading-edge undulations or tubercles of humpback whale flippers have been known as one of biomimetic technologies adaptable to flow control of aerofoils, particularly at post stall conditions. These leading-edge undulations are also known to reduce noise resulting from an interaction with on-coming turbulence. We have recently carried out a parametric study of a NACA 65(12)-10 aerofoil with a view to optimise the amplitude and the wavelength of leading-edge undulations for noise reduction and aerodynamic enhancement. A 3x3 test matrix composing of three amplitudes (h = 3%, 6% and 12% chord) and three wavelengths (? = 10%, 20% and 30% chord) was used in the investigation, where lift, drag and noise were measured at the Reynolds number of 105. In this test, a turbulence-generating grid was installed at the inlet of the test section to increase the turbulence level in the freestream and to promote transition to turbulence near the leading edge of aerofoils without a need for a trip device. Within the test matrix considered, we found that the best improvement in CL,max is given with the greatest wavelength and amplitude, whereas the maximum noise reduction is obtained with the small wavelength and the large amplitude. EPSRC (Grant Number EP/N018486/1) in the UK. |
format |
Conference Object |
author |
Kim, JH Choi, KS Lacagnina, G Joseph, P Hasheminejad, SM Chong, TP Shahab, MF Omidyeganeh, M Pinelli, A |
author_facet |
Kim, JH Choi, KS Lacagnina, G Joseph, P Hasheminejad, SM Chong, TP Shahab, MF Omidyeganeh, M Pinelli, A |
author_sort |
Kim, JH |
title |
Optimization of leading-edge undulation of a NACA 65(12)-10 aerofoil for noise reduction and aerodynamic enhancement |
title_short |
Optimization of leading-edge undulation of a NACA 65(12)-10 aerofoil for noise reduction and aerodynamic enhancement |
title_full |
Optimization of leading-edge undulation of a NACA 65(12)-10 aerofoil for noise reduction and aerodynamic enhancement |
title_fullStr |
Optimization of leading-edge undulation of a NACA 65(12)-10 aerofoil for noise reduction and aerodynamic enhancement |
title_full_unstemmed |
Optimization of leading-edge undulation of a NACA 65(12)-10 aerofoil for noise reduction and aerodynamic enhancement |
title_sort |
optimization of leading-edge undulation of a naca 65(12)-10 aerofoil for noise reduction and aerodynamic enhancement |
publisher |
RWTH Aachen University |
publishDate |
2019 |
url |
https://bura.brunel.ac.uk/handle/2438/25055 https://doi.org/10.18154/RWTH-CONV-239781 |
genre |
Humpback Whale |
genre_facet |
Humpback Whale |
op_relation |
Proceedings of the International Congress on Acoustics Choi, K.-S., Kim, J.-H., Lacagnina, G., Joseph, P., Hasheminejad, S.M., Chong, T.P., Shahab, M.F., Omidyeganeh, M. and Pinelli, A. (2019) 'Optimization of leading-edge undulation of a NACA 65(12)-10 aerofoil for noise reduction and aerodynamic enhancement', in: Ochmann, M., Vorländer, M. and Fels, J. (eds.) Proceedings of the 23rd International Congress on Acoustics : integrating 4th EAA Euroregio 2019, Aachen, Germany, 9-13 September 2019, 2019-September pp. 5351 - 5358. doi:10.18154/RWTH-CONV-239781. 9783939296157 2226-7808 https://bura.brunel.ac.uk/handle/2438/25055 https://doi.org/10.18154/RWTH-CONV-239781 2415-1599 |
op_rights |
Copyright © 2019 The Author(s). Published and hosted by RWTH Aachen University under a Creative Commons (CC BY-NC-SA) Attribution License (https://creativecommons.org/licenses/by-nc-sa/4.0/). https://creativecommons.org/licenses/by-nc-sa/4.0/ |
op_rightsnorm |
CC-BY-NC-SA CC-BY |
op_doi |
https://doi.org/10.18154/RWTH-CONV-239781 |
_version_ |
1766026386577817600 |