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Aerodynamic Simulations of a Class 8 Heavy Truck: Comparison to Wind Tunnel Results and Investigation of Blockage Influences
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 30, 2007 by SAE International in United States
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The accuracy of the Lattice-Boltzmann based simulation method for prediction of aerodynamic drag on a heavy truck was evaluated by comparing results to twenty percent scale model wind tunnel measurements from the University of Washington Aeronautical Laboratory (UWAL). A detailed preproduction Kenworth T2000 tractor trailer was used as the scale model. The results include a comparison of normalized drag between simulation and wind tunnel as well as percentage drag change with the addition of a radius to the rear edge of the trailer. Significant effort was involved to model all of the wind tunnel details affecting the tractor-trailer drag. These are discussed along with the results of additional simulations which were performed to study the impact of the UWAL tunnel geometry relative to a tunnel with the same blockage and constant cross-sectional area, and a case with negligible blockage. Advanced post-processing of the simulation results was used to study the drag contribution from the trailer features including underbody, rear bumper, and bogie wheel assembly.
CitationHorrigan, K., Duncan, B., Sivakumar, P., Gupta, A. et al., "Aerodynamic Simulations of a Class 8 Heavy Truck: Comparison to Wind Tunnel Results and Investigation of Blockage Influences," SAE Technical Paper 2007-01-4295, 2007, https://doi.org/10.4271/2007-01-4295.
SAE 2007 Transactions Journal of Commercial Vehicles
Number: V116-2; Published: 2008-08-15
Number: V116-2; Published: 2008-08-15
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