Browse Publications Technical Papers 2021-01-0950

A Detailed Aerodynamics Investigation of Three Variants of the Generic Truck Utility 2021-01-0950

Three pickup truck variants of the Generic Truck Utility (GTU) are evaluated and compared using wind tunnel test data and computational fluid dynamics (CFD) simulations. The configurations analyzed are the short cab/long box, medium cab/medium box, and long cab/short box geometries, which all share a common vehicle length and wheelbase. Both cab and box length are known to influence the total bluff body drag through the interaction of the cab wake in the pickup box with the total vehicle wake, and the GTU provides an excellent test box to investigate the details of these interactions. Experimental testing was conducted at the WindShear wind tunnel on a full-scale GTU model, while transient CFD simulations were carried out with IconCFD®, an open-source based solver. Experimental and CFD results are used to describe the general flow field around the vehicle, and a comparison is made with the wind tunnel integral force data as well as centerline pressure tap data. Further details and changes in the flow field due to the interaction of the chin spoiler with different cab and box length combinations are also evaluated, expanding upon previous work completed by Larson and Woodiga 2018 [16].


Subscribers can view annotate, and download all of SAE's content. Learn More »

Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Near-to-Far Wake Characteristics of Road Vehicles Part 1: Influence of Ground Motion and Vehicle Shape


View Details


Three Dimensional CFD Analysis on Aerodynamic Drag Reduction of a Bluff Tractor Trailer Body using Vortex Generators


View Details


Development of Devices to Reduce the Aerodynamic Resistance of Trucks


View Details