1993-11-01

Drag Reduction of a Cube-Type Truck Configuration Through Boundary-Layer Control: Experiments and Prototype Road Tests 931893

The paper presents results of an organized and extensive wind tunnel test-program, complemented by flow visualization and full-scale road tests, aimed at assessing the effectiveness of a boundary-layer control procedure for the drag reduction of a cube-van. Wind tunnel results, obtained using 1/6 scale model, at a subcritical Reynolds number of 105, suggest that tripping of the boundary-layer using fences reduce the pressure drag coefficient. The entirely passive character of the procedure is quite attractive from the economic consideration as well as the ease of implementation. The road tests with a full-size cube-van substantiated the trends indicated by the fence data; although the actual drag reduction observed was lower (yet quite significant, 16.6%) than that predicted by the wind tunnel tests. This may be attribute to a wide variety of factors including the differences in the geometry and test conditions. Fuel consumption results also substantiated the drag reduction trend. It is concluded that fences can lead to a significant reduction in the drag and fuel consumption when applied to flat-faced trucks if positioned correctly. They represent an elegant, versatile, and economical approach to improve the truck performance.

SAE MOBILUS

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

Access SAE MOBILUS »

Members save up to 18% 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:
TECHNICAL PAPER

Operational Road Tests of Truck Aerodynamic Drag Reduction Devices

770690

View Details

TECHNICAL PAPER

Aerodynamic Study of a Production Tractor Trailer Combination using Simulation and Wind Tunnel Methods

2010-01-2040

View Details

TECHNICAL PAPER

Tractor-Trailer Fuel Savings with an Aerodynamic Device -A Comparison of Wind Tunnel and On-Road Tests

820376

View Details

X