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Effect Of Surface Roughness On Drag Of Loggerhead Carapace

The present investigation primarily studies the effect of surface roughness on the drag coefficient, Cd of a Loggerhead sea turtle carapace using a subsonic wind tunnel. The pressure coefficient, Cp distribution across the Loggerhead carapace was also investigated and is compared to the Cp trend of...

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Main Authors: Cheng, See Yuan, Mat Yamin, Ahmad Kamal, Chan, Alan Kah Poh, Jalaluddin, Ainil Jesita, Ishak, Iskandar Shah, Mansor, Shuhaimi
Format: Article
Language:English
Published: Penerbit UTM Press 2008
Online Access:http://eprints.utem.edu.my/id/eprint/10308/1/EFFECT_OF_SURFACE_ROUGHNESS_ON_DRAG_OF_LOGGERHEAD_CARAPACE.pdf
http://eprints.utem.edu.my/id/eprint/10308/
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.490.2302&rep=rep1&type=pdf
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spelling my.utem.eprints.103082021-07-05T14:58:36Z http://eprints.utem.edu.my/id/eprint/10308/ Effect Of Surface Roughness On Drag Of Loggerhead Carapace Cheng, See Yuan Mat Yamin, Ahmad Kamal Chan, Alan Kah Poh Jalaluddin, Ainil Jesita Ishak, Iskandar Shah Mansor, Shuhaimi The present investigation primarily studies the effect of surface roughness on the drag coefficient, Cd of a Loggerhead sea turtle carapace using a subsonic wind tunnel. The pressure coefficient, Cp distribution across the Loggerhead carapace was also investigated and is compared to the Cp trend of an airfoil in order to deduce the aerodynamics features of the Loggerhead carapace. One-to-five-scaled models are created based on the dimensions of a real Loggerhead turtle with simplification. Four roughness scales were employed to capture the Cd trend at increasing Reynolds numbers, Re. As expected, the Cd levelled off with Re for all four models investigated. However, the Re where constant Cd began varies with relative roughness of the carapace models. Good correlation between the Cd and relative roughness is obtained. In addition, the wind tunnel results are able to capture the Cp trend of the carapace models and compared to Cp values of an airfoil. Results reveal that the upper surface of the Loggerhead carapace is streamlined but with restrictions of angle of attack. Penerbit UTM Press 2008-12 Article PeerReviewed text en http://eprints.utem.edu.my/id/eprint/10308/1/EFFECT_OF_SURFACE_ROUGHNESS_ON_DRAG_OF_LOGGERHEAD_CARAPACE.pdf Cheng, See Yuan and Mat Yamin, Ahmad Kamal and Chan, Alan Kah Poh and Jalaluddin, Ainil Jesita and Ishak, Iskandar Shah and Mansor, Shuhaimi (2008) Effect Of Surface Roughness On Drag Of Loggerhead Carapace. Jurnal Mekanikal (26). pp. 37-48. ISSN 2289-3873 http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.490.2302&rep=rep1&type=pdf
institution Universiti Teknikal Malaysia Melaka
building UTEM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknikal Malaysia Melaka
content_source UTEM Institutional Repository
url_provider http://eprints.utem.edu.my/
language English
description The present investigation primarily studies the effect of surface roughness on the drag coefficient, Cd of a Loggerhead sea turtle carapace using a subsonic wind tunnel. The pressure coefficient, Cp distribution across the Loggerhead carapace was also investigated and is compared to the Cp trend of an airfoil in order to deduce the aerodynamics features of the Loggerhead carapace. One-to-five-scaled models are created based on the dimensions of a real Loggerhead turtle with simplification. Four roughness scales were employed to capture the Cd trend at increasing Reynolds numbers, Re. As expected, the Cd levelled off with Re for all four models investigated. However, the Re where constant Cd began varies with relative roughness of the carapace models. Good correlation between the Cd and relative roughness is obtained. In addition, the wind tunnel results are able to capture the Cp trend of the carapace models and compared to Cp values of an airfoil. Results reveal that the upper surface of the Loggerhead carapace is streamlined but with restrictions of angle of attack.
format Article
author Cheng, See Yuan
Mat Yamin, Ahmad Kamal
Chan, Alan Kah Poh
Jalaluddin, Ainil Jesita
Ishak, Iskandar Shah
Mansor, Shuhaimi
spellingShingle Cheng, See Yuan
Mat Yamin, Ahmad Kamal
Chan, Alan Kah Poh
Jalaluddin, Ainil Jesita
Ishak, Iskandar Shah
Mansor, Shuhaimi
Effect Of Surface Roughness On Drag Of Loggerhead Carapace
author_facet Cheng, See Yuan
Mat Yamin, Ahmad Kamal
Chan, Alan Kah Poh
Jalaluddin, Ainil Jesita
Ishak, Iskandar Shah
Mansor, Shuhaimi
author_sort Cheng, See Yuan
title Effect Of Surface Roughness On Drag Of Loggerhead Carapace
title_short Effect Of Surface Roughness On Drag Of Loggerhead Carapace
title_full Effect Of Surface Roughness On Drag Of Loggerhead Carapace
title_fullStr Effect Of Surface Roughness On Drag Of Loggerhead Carapace
title_full_unstemmed Effect Of Surface Roughness On Drag Of Loggerhead Carapace
title_sort effect of surface roughness on drag of loggerhead carapace
publisher Penerbit UTM Press
publishDate 2008
url http://eprints.utem.edu.my/id/eprint/10308/1/EFFECT_OF_SURFACE_ROUGHNESS_ON_DRAG_OF_LOGGERHEAD_CARAPACE.pdf
http://eprints.utem.edu.my/id/eprint/10308/
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.490.2302&rep=rep1&type=pdf
_version_ 1705060016271130624
score 13.211869

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