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CLC number: U46; TB4

On-line Access: 2011-07-04

Received: 2010-12-14

Revision Accepted: 2011-04-19

Crosschecked: 2011-06-21

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Journal of Zhejiang University SCIENCE A 2011 Vol.12 No.7 P.543-551

http://doi.org/10.1631/jzus.A1000505


Use of bionic inspired surfaces for aerodynamic drag reduction on motor vehicle body panels


Author(s):  Xiao-wen Song, Guo-geng Zhang, Yun Wang, Shu-gen Hu

Affiliation(s):  Department of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   songxw@zju.edu.cn

Key Words:  Computational fluid dynamics (CFD), Bionics, Non-smooth surface, Aerodynamic drag reduction, Vehicle body


Xiao-wen Song, Guo-geng Zhang, Yun Wang, Shu-gen Hu. Use of bionic inspired surfaces for aerodynamic drag reduction on motor vehicle body panels[J]. Journal of Zhejiang University Science A, 2011, 12(7): 543-551.

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author="Xiao-wen Song, Guo-geng Zhang, Yun Wang, Shu-gen Hu",
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%A Yun Wang
%A Shu-gen Hu
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T1 - Use of bionic inspired surfaces for aerodynamic drag reduction on motor vehicle body panels
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1000505


Abstract: 
Inspired by the successful applications of biological non-smoothness, we introduced bionic non-smooth surfaces as appendices into vehicle body design, aiming to further reduce aerodynamic drag. The size range of the non-smooth units with pits and grooves was determined according to our analysis with the mechanisms underlying non-smooth unit mediated aerodynamic drag reduction. The bionic non-smooth units reported here were designed to adapt the structure of a given vehicle body from the point of boundary layer control that reduces the burst and the loss of turbulent kinetic energy. The engine cover lid and vehicle body cap were individually treated with the non-smooth units, and the treated vehicles were subjected to aerodynamic drag coefficient simulation tests using the computational fluid dynamics (CFD) analysis method. The simulation results showed that, in comparison with smooth surfaces, properly designed non-smooth surfaces can have greater effects on drag reduction. The mechanism underlying drag reduction mediated by non-smooth surfaces was revealed by further analyses, in which the effects of non-smooth and smooth surfaces were directly compared.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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