Effects of Non-Smooth Surface Dimple Configuration on Vehicle Body Aerodynamic Characteristics

XIE Fei; DING Yu-mei; QIN Liu; YU Hua-chun; YANG Wei-min

doi:10.3879/j.issn.1000-0887.2015.05.006

Volume 36 Issue 5

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Article Navigation > Applied Mathematics and Mechanics > 2015 > 36(5): 505-514

XIE Fei, DING Yu-mei, QIN Liu, YU Hua-chun, YANG Wei-min. Effects of Non-Smooth Surface Dimple Configuration on Vehicle Body Aerodynamic Characteristics[J]. Applied Mathematics and Mechanics, 2015, 36(5): 505-514. doi: 10.3879/j.issn.1000-0887.2015.05.006

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Effects of Non-Smooth Surface Dimple Configuration on Vehicle Body Aerodynamic Characteristics

doi: 10.3879/j.issn.1000-0887.2015.05.006

¹College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R.China;²Ningbo GMF New Material Technology Co., Ltd., Ningbo, Zhejiang 315000, P.R.China

Received Date: 2014-08-29
Rev Recd Date: 2015-03-20
Publish Date: 2015-05-15

Abstract

Abstract

According to the idea of bionic non-smooth revolution bodies, the SAE (Society of Automobile Engineers) standard model was selected as the object of study, and the computational fluid dynamics (CFD) method was used to investigate the effects of different non-smooth surface dimple array forms and densities on the aerodynamic performance of vehicle bodies. Through comparison of such flow field performance indicators as wake flow, airflow velocity, pressure field and turbulence kinetic energy between various models, the drag reduction mechanism of the dimpled non-smooth surface and the reasons for the difference of flow field properties between those models were analyzed. The results show that the minimum aerodynamic drag occurs when the dimple units are arranged in a rectangular configuration, and the aerodynamic drag decreases along with the longitudinal dimple distribution density, attaining the highest drag reduction ratio up to 4.1%.
- drag reduction,
- SAE model,
- CFD,
- non-smooth surface

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References(13)

References

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