Optimization of leading-edge undulation of a NACA 65(12)-10 aerofoil for noise reduction and aerodynamic enhancement
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...
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Deutsche Gesellschaft für Akustik
2019
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ftcityunivlondon:oai:openaccess.city.ac.uk:25562 2023-07-02T03:32:32+02:00 Optimization of leading-edge undulation of a NACA 65(12)-10 aerofoil for noise reduction and aerodynamic enhancement Kim, J. H. Choi, K. S. Lacagnina, G. Joseph, P. Hasheminejad, S. M. Chong, T. P. Shahab, M. F. Omidyeganeh, M. Pinelli, A. 2019-09-09 text https://openaccess.city.ac.uk/id/eprint/25562/ https://openaccess.city.ac.uk/id/eprint/25562/1/ICA-2019-1219.pdf https://publications.rwth-aachen.de/record/770192 https://doi.org/10.18154/RWTH-CONV-239781 en eng Deutsche Gesellschaft für Akustik https://openaccess.city.ac.uk/id/eprint/25562/1/ICA-2019-1219.pdf Kim, J. H., Choi, K. S., Lacagnina, G. , Joseph, P., Hasheminejad, S. M., Chong, T. P., Shahab, M. F., Omidyeganeh, M. https://openaccess.city.ac.uk/view/creators_id/omid=2Eyeganeh=2E2.html orcid:0000-0002-4140-2810 orcid:0000-0002-4140-2810 Pinelli, A. https://openaccess.city.ac.uk/view/creators_id/alfredo=2Epinelli=2E1.html orcid:0000-0001-5564-9032 orcid:0000-0001-5564-9032 view all authorsEPJS_limit_names_shown_load( 'creators_name_25562_et_al', 'creators_name_25562_rest' ); (2019). Optimization of leading-edge undulation of a NACA 65(12)-10 aerofoil for noise reduction and aerodynamic enhancement. In: Proceedings of the 23rd International Congress on Acoustics : integrating 4th EAA Euroregio 2019 : 9-13 September 2019 in Aachen, Germany. (pp. 5351-5358). Berlin: Deutsche Gesellschaft für Akustik. doi:10.18154/RWTH-CONV-239781 https://doi.org/10.18154/RWTH-CONV-239781 doi:10.18154/RWTH-CONV-239781 TJ Mechanical engineering and machinery TL Motor vehicles. Aeronautics. Astronautics Book Section PeerReviewed 2019 ftcityunivlondon https://doi.org/10.18154/RWTH-CONV-239781 2023-06-13T18:41:04Z 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. Book Part Humpback Whale City University London: City Research Online |
institution |
Open Polar |
collection |
City University London: City Research Online |
op_collection_id |
ftcityunivlondon |
language |
English |
topic |
TJ Mechanical engineering and machinery TL Motor vehicles. Aeronautics. Astronautics |
spellingShingle |
TJ Mechanical engineering and machinery TL Motor vehicles. Aeronautics. Astronautics Kim, J. H. Choi, K. S. Lacagnina, G. Joseph, P. Hasheminejad, S. M. Chong, T. P. Shahab, M. F. Omidyeganeh, M. Pinelli, A. Optimization of leading-edge undulation of a NACA 65(12)-10 aerofoil for noise reduction and aerodynamic enhancement |
topic_facet |
TJ Mechanical engineering and machinery TL Motor vehicles. Aeronautics. Astronautics |
description |
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. |
format |
Book Part |
author |
Kim, J. H. Choi, K. S. Lacagnina, G. Joseph, P. Hasheminejad, S. M. Chong, T. P. Shahab, M. F. Omidyeganeh, M. Pinelli, A. |
author_facet |
Kim, J. H. Choi, K. S. Lacagnina, G. Joseph, P. Hasheminejad, S. M. Chong, T. P. Shahab, M. F. Omidyeganeh, M. Pinelli, A. |
author_sort |
Kim, J. H. |
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 |
Deutsche Gesellschaft für Akustik |
publishDate |
2019 |
url |
https://openaccess.city.ac.uk/id/eprint/25562/ https://openaccess.city.ac.uk/id/eprint/25562/1/ICA-2019-1219.pdf https://publications.rwth-aachen.de/record/770192 https://doi.org/10.18154/RWTH-CONV-239781 |
genre |
Humpback Whale |
genre_facet |
Humpback Whale |
op_relation |
https://openaccess.city.ac.uk/id/eprint/25562/1/ICA-2019-1219.pdf Kim, J. H., Choi, K. S., Lacagnina, G. , Joseph, P., Hasheminejad, S. M., Chong, T. P., Shahab, M. F., Omidyeganeh, M. https://openaccess.city.ac.uk/view/creators_id/omid=2Eyeganeh=2E2.html orcid:0000-0002-4140-2810 orcid:0000-0002-4140-2810 Pinelli, A. https://openaccess.city.ac.uk/view/creators_id/alfredo=2Epinelli=2E1.html orcid:0000-0001-5564-9032 orcid:0000-0001-5564-9032 view all authorsEPJS_limit_names_shown_load( 'creators_name_25562_et_al', 'creators_name_25562_rest' ); (2019). Optimization of leading-edge undulation of a NACA 65(12)-10 aerofoil for noise reduction and aerodynamic enhancement. In: Proceedings of the 23rd International Congress on Acoustics : integrating 4th EAA Euroregio 2019 : 9-13 September 2019 in Aachen, Germany. (pp. 5351-5358). Berlin: Deutsche Gesellschaft für Akustik. doi:10.18154/RWTH-CONV-239781 https://doi.org/10.18154/RWTH-CONV-239781 doi:10.18154/RWTH-CONV-239781 |
op_doi |
https://doi.org/10.18154/RWTH-CONV-239781 |
_version_ |
1770272127881052160 |