A wind tunnel test program was conducted at the Langley Full Scale Tunnel (LFST) to evaluate the performance of five passive drag reduction configurations on a modern straight truck at full scale. Configurations were tested in a build-up fashion with results representing a cumulative effect. Tested configurations include a front valance, a front box fairing, a boat-tail, an ideal side-skirt, and a practical side-skirt. Configurations were evaluated over a nominal 9 degree yaw sweep to establish wind averaged drag coefficients using SAE J1252. Genuine replicate yaw sweeps were used in an uncertainty analysis. Results show up to 28% improvement in wind-averaged drag coefficient and that significant gains can be made in straight truck fuel economy, even at non-highway speeds.
Drag Reduction of a Modern Straight Truck
Sae Int. J. Commer. Veh
Commercial Vehicle Engineering Congress ; 2011
Sae International Journal of Commercial Vehicles ; 4 , 1 ; 256-262
13.09.2011
7 pages
Aufsatz (Konferenz)
Englisch
Drag Reduction of a Modern Straight Truck
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