Passive drag reduction of square back road vehicles
Bluff body vehicles such as trucks and buses do not have a streamlined shapes and hence have high drag which can be reduced to make great savings in operational cost. While rectangular flaps have been widely studied as both passive add-ons and in active drag reducing systems for bluff bodies, cha...
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| Format: | Article |
| Language: | English English |
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Elsevier Ltd.
2014
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| Online Access: | http://irep.iium.edu.my/38911/ http://irep.iium.edu.my/38911/ http://irep.iium.edu.my/38911/4/1-s2.0-S0167610514001640-main.pdf http://irep.iium.edu.my/38911/7/38911_Passive%20drag%20reduction%20of%20square%20back%20road%20vehicles.SCOPUS.pdf |
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iium-389112017-09-26T07:32:41Z http://irep.iium.edu.my/38911/ Passive drag reduction of square back road vehicles Altaf, Alaman Omar, Ashraf Ali Asrar, Waqar TL1 Motor vehicles Bluff body vehicles such as trucks and buses do not have a streamlined shapes and hence have high drag which can be reduced to make great savings in operational cost. While rectangular flaps have been widely studied as both passive add-ons and in active drag reducing systems for bluff bodies, changing the basic geometry of the flap has not been explored in literature. In this work, a baseline drag value is obtained for a simplified MAN TGX series truck in a CFD software, and the drag reduction of a proposed elliptically shaped flap is compared to aerodynamically equivalent rectangular flaps. The optimal mounting angle for both flaps is found to be 501. A parametric study of changing the ellipse semi-major axis is carried out to find the optimal length for drag reduction. A maximum drag reduction of 11.1% is achieved using an elliptical flap with 0.12 m semi-major axis; compared to 6.37% for a length equivalent rectangular flap, and 6.84% for a surface area equivalent rectangular flap. Results of the pressure distribution and velocity flow behind the rear of the truck are also given and analyzed. Elsevier Ltd. 2014 Article PeerReviewed application/pdf en http://irep.iium.edu.my/38911/4/1-s2.0-S0167610514001640-main.pdf application/pdf en http://irep.iium.edu.my/38911/7/38911_Passive%20drag%20reduction%20of%20square%20back%20road%20vehicles.SCOPUS.pdf Altaf, Alaman and Omar, Ashraf Ali and Asrar, Waqar (2014) Passive drag reduction of square back road vehicles. Journal of Wind Engineering and Industrial Aerodynamics, 134 (2014). pp. 30-43. ISSN 0167-6105 http://www.elsevier.com/locate/jweia |
| repository_type |
Digital Repository |
| institution_category |
Local University |
| institution |
International Islamic University Malaysia |
| building |
IIUM Repository |
| collection |
Online Access |
| language |
English English |
| topic |
TL1 Motor vehicles |
| spellingShingle |
TL1 Motor vehicles Altaf, Alaman Omar, Ashraf Ali Asrar, Waqar Passive drag reduction of square back road vehicles |
| description |
Bluff body vehicles such as trucks and buses do not have a streamlined shapes and hence have high
drag which can be reduced to make great savings in operational cost. While rectangular flaps have
been widely studied as both passive add-ons and in active drag reducing systems for bluff bodies,
changing the basic geometry of the flap has not been explored in literature. In this work, a baseline
drag value is obtained for a simplified MAN TGX series truck in a CFD software, and the drag
reduction of a proposed elliptically shaped flap is compared to aerodynamically equivalent
rectangular flaps. The optimal mounting angle for both flaps is found to be 501. A parametric study
of changing the ellipse semi-major axis is carried out to find the optimal length for drag reduction. A
maximum drag reduction of 11.1% is achieved using an elliptical flap with 0.12 m semi-major axis;
compared to 6.37% for a length equivalent rectangular flap, and 6.84% for a surface area equivalent
rectangular flap. Results of the pressure distribution and velocity flow behind the rear of the truck
are also given and analyzed. |
| format |
Article |
| author |
Altaf, Alaman Omar, Ashraf Ali Asrar, Waqar |
| author_facet |
Altaf, Alaman Omar, Ashraf Ali Asrar, Waqar |
| author_sort |
Altaf, Alaman |
| title |
Passive drag reduction of square back road vehicles |
| title_short |
Passive drag reduction of square back road vehicles |
| title_full |
Passive drag reduction of square back road vehicles |
| title_fullStr |
Passive drag reduction of square back road vehicles |
| title_full_unstemmed |
Passive drag reduction of square back road vehicles |
| title_sort |
passive drag reduction of square back road vehicles |
| publisher |
Elsevier Ltd. |
| publishDate |
2014 |
| url |
http://irep.iium.edu.my/38911/ http://irep.iium.edu.my/38911/ http://irep.iium.edu.my/38911/4/1-s2.0-S0167610514001640-main.pdf http://irep.iium.edu.my/38911/7/38911_Passive%20drag%20reduction%20of%20square%20back%20road%20vehicles.SCOPUS.pdf |
| first_indexed |
2023-09-18T20:55:54Z |
| last_indexed |
2023-09-18T20:55:54Z |
| _version_ |
1777410302126587904 |