Experimental and numerical analysis of humpback whale inspired tubercles on swept wings
Purpose With aims to increase the aerodynamic efficiency of aerodynamic surfaces, study on flow control over these surfaces has gained importance. With the addition of flow control devices such as synthetic jets and vortex generators, the flow characteristics can be modified over the surface and, at...
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cremerald:10.1108/aeat-04-2021-0114 2024-06-09T07:46:37+00:00 Experimental and numerical analysis of humpback whale inspired tubercles on swept wings Joseph, Jeena A., Sathyabhama Sridhar, Surya 2022 http://dx.doi.org/10.1108/aeat-04-2021-0114 https://www.emerald.com/insight/content/doi/10.1108/AEAT-04-2021-0114/full/xml https://www.emerald.com/insight/content/doi/10.1108/AEAT-04-2021-0114/full/html en eng Emerald https://www.emerald.com/insight/site-policies Aircraft Engineering and Aerospace Technology volume 94, issue 10, page 1577-1592 ISSN 1748-8842 1748-8842 journal-article 2022 cremerald https://doi.org/10.1108/aeat-04-2021-0114 2024-05-15T13:23:44Z Purpose With aims to increase the aerodynamic efficiency of aerodynamic surfaces, study on flow control over these surfaces has gained importance. With the addition of flow control devices such as synthetic jets and vortex generators, the flow characteristics can be modified over the surface and, at the same time, enhance the performance of the body. One such flow control device is the tubercle. Inspired by the humpback whale’s flippers, these leading-edge serrations have improved the aerodynamic efficiency and the lift characteristics of airfoils and wings. This paper aims to discusses in detail the flow physics associated with tubercles and their effect on swept wings. Design/methodology/approach This study involves a series of experimental and numerical analyses that have been performed on four different wing configurations, with four different sweep angles corresponding to 0°, 10°, 20° and 30° at a low Reynolds number corresponding to Re c =100,000. Findings Results indicate that the effect of tubercles diminishes with an increase in wing sweep. A significant performance enhancement was observed in the stall and post-stall regions. The addition of tubercles led to a smooth post-stall lift characteristic compared to the sudden loss in the lift with regular wings. Among the four different wings under observation, it was found that tubercles were most effective on the 0° configuration (no sweep), showing a 10.8% increment in maximum lift and a 38.5% increase in the average lift generated in the post-stall region. Tubercles were least effective on 30° configuration. Furthermore, with an increase in wing sweep, co-rotating vortices were distinctly observed rather than counter-rotating vortices. Originality/value While extensive numerical and experimental studies have been performed on straight wings with tubercles, studies on the tubercle effect on swept wings at low Reynolds number are minimal and mainly experimental in nature. This study uses numerical methods to explore the complex flow physics associated with ... Article in Journal/Newspaper Humpback Whale Emerald Aircraft Engineering and Aerospace Technology |
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Purpose With aims to increase the aerodynamic efficiency of aerodynamic surfaces, study on flow control over these surfaces has gained importance. With the addition of flow control devices such as synthetic jets and vortex generators, the flow characteristics can be modified over the surface and, at the same time, enhance the performance of the body. One such flow control device is the tubercle. Inspired by the humpback whale’s flippers, these leading-edge serrations have improved the aerodynamic efficiency and the lift characteristics of airfoils and wings. This paper aims to discusses in detail the flow physics associated with tubercles and their effect on swept wings. Design/methodology/approach This study involves a series of experimental and numerical analyses that have been performed on four different wing configurations, with four different sweep angles corresponding to 0°, 10°, 20° and 30° at a low Reynolds number corresponding to Re c =100,000. Findings Results indicate that the effect of tubercles diminishes with an increase in wing sweep. A significant performance enhancement was observed in the stall and post-stall regions. The addition of tubercles led to a smooth post-stall lift characteristic compared to the sudden loss in the lift with regular wings. Among the four different wings under observation, it was found that tubercles were most effective on the 0° configuration (no sweep), showing a 10.8% increment in maximum lift and a 38.5% increase in the average lift generated in the post-stall region. Tubercles were least effective on 30° configuration. Furthermore, with an increase in wing sweep, co-rotating vortices were distinctly observed rather than counter-rotating vortices. Originality/value While extensive numerical and experimental studies have been performed on straight wings with tubercles, studies on the tubercle effect on swept wings at low Reynolds number are minimal and mainly experimental in nature. This study uses numerical methods to explore the complex flow physics associated with ... |
format |
Article in Journal/Newspaper |
author |
Joseph, Jeena A., Sathyabhama Sridhar, Surya |
spellingShingle |
Joseph, Jeena A., Sathyabhama Sridhar, Surya Experimental and numerical analysis of humpback whale inspired tubercles on swept wings |
author_facet |
Joseph, Jeena A., Sathyabhama Sridhar, Surya |
author_sort |
Joseph, Jeena |
title |
Experimental and numerical analysis of humpback whale inspired tubercles on swept wings |
title_short |
Experimental and numerical analysis of humpback whale inspired tubercles on swept wings |
title_full |
Experimental and numerical analysis of humpback whale inspired tubercles on swept wings |
title_fullStr |
Experimental and numerical analysis of humpback whale inspired tubercles on swept wings |
title_full_unstemmed |
Experimental and numerical analysis of humpback whale inspired tubercles on swept wings |
title_sort |
experimental and numerical analysis of humpback whale inspired tubercles on swept wings |
publisher |
Emerald |
publishDate |
2022 |
url |
http://dx.doi.org/10.1108/aeat-04-2021-0114 https://www.emerald.com/insight/content/doi/10.1108/AEAT-04-2021-0114/full/xml https://www.emerald.com/insight/content/doi/10.1108/AEAT-04-2021-0114/full/html |
genre |
Humpback Whale |
genre_facet |
Humpback Whale |
op_source |
Aircraft Engineering and Aerospace Technology volume 94, issue 10, page 1577-1592 ISSN 1748-8842 1748-8842 |
op_rights |
https://www.emerald.com/insight/site-policies |
op_doi |
https://doi.org/10.1108/aeat-04-2021-0114 |
container_title |
Aircraft Engineering and Aerospace Technology |
_version_ |
1801376567686856704 |