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Effect of surface roughness on drag of loggerhead carapace

The present investigation prim arily 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...

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Main Authors: Kah Poh, Alan Chan, Yuan, Cheng See, Mat Yamin, Ahmad Kamal, Jalaluddin, Ainil Jesita, Ishak, Iskandar Shah, Mansor, Shuhaimi
Format: Article
Language:English
Published: 2008
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Online Access:http://eprints.utm.my/id/eprint/18865/1/IskandarShahIshak2008_EFFECT%20OF%20SURFACE%20ROUGHNESS%20ON%20DRAG.pdf
http://eprints.utm.my/id/eprint/18865/
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.490.2302&rep=rep1&type=pdf
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spelling my.utm.188652017-10-12T06:16:26Z http://eprints.utm.my/id/eprint/18865/ Effect of surface roughness on drag of loggerhead carapace Kah Poh, Alan Chan Yuan, Cheng See Mat Yamin, Ahmad Kamal Jalaluddin, Ainil Jesita Ishak, Iskandar Shah Mansor, Shuhaimi Unspecified The present investigation prim arily 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. 2008 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/18865/1/IskandarShahIshak2008_EFFECT%20OF%20SURFACE%20ROUGHNESS%20ON%20DRAG.pdf Kah Poh, Alan Chan and Yuan, Cheng See and Mat Yamin, Ahmad Kamal and Jalaluddin, Ainil Jesita and Ishak, Iskandar Shah and Mansor, Shuhaimi (2008) Effect of surface roughness on drag of loggerhead carapace. Jurnal Mekanikal (26). 37 - 48. ISSN 0127-3396 http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.490.2302&rep=rep1&type=pdf
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic Unspecified
spellingShingle Unspecified
Kah Poh, Alan Chan
Yuan, Cheng See
Mat Yamin, Ahmad Kamal
Jalaluddin, Ainil Jesita
Ishak, Iskandar Shah
Mansor, Shuhaimi
Effect of surface roughness on drag of loggerhead carapace
description The present investigation prim arily 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 Kah Poh, Alan Chan
Yuan, Cheng See
Mat Yamin, Ahmad Kamal
Jalaluddin, Ainil Jesita
Ishak, Iskandar Shah
Mansor, Shuhaimi
author_facet Kah Poh, Alan Chan
Yuan, Cheng See
Mat Yamin, Ahmad Kamal
Jalaluddin, Ainil Jesita
Ishak, Iskandar Shah
Mansor, Shuhaimi
author_sort Kah Poh, Alan Chan
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
publishDate 2008
url http://eprints.utm.my/id/eprint/18865/1/IskandarShahIshak2008_EFFECT%20OF%20SURFACE%20ROUGHNESS%20ON%20DRAG.pdf
http://eprints.utm.my/id/eprint/18865/
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.490.2302&rep=rep1&type=pdf
_version_ 1643647011895902208
score 13.211869

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