A Wind-Tunnel Study of the Effect of Turning Vanes on the Aerodynamic Drag of Tractor-Trailer Trucks

[+] Author and Article Information
C. H. Marks, F. T. Buckley

Department of Mechanical Engineering, University of Maryland, College Park, Md.

J. Fluids Eng 100(4), 439-442 (Dec 01, 1978) (4 pages) doi:10.1115/1.3448704 History: Received June 16, 1975; Online October 12, 2010


A Wind-Tunnel Study was made of the reduction of the aerodynamic drag of tractor-trailer trucks due to turning vanes used to control flow separation. A variety of vane settings and positions were investigated on the tractor and on the trailer. It was found that substantial drag reductions were obtained by employing vanes on the lower part of the front vertical edges of the tractor. Vanes mounted elsewhere had a smaller effect on the aerodynamic drag. Vane setting, turning angle and edge radius were found to be highly important.

Copyright © 1978 by ASME
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