Browse Publications Technical Papers 2018-01-0718
2018-04-03

Parametric Study of Asymmetric Side Tapering in Constant Cross Wind Conditions 2018-01-0718

Sports Utility Vehicles (SUVs) often have blunt rear end geometries for design and practicality, which is not typically aerodynamic. Drag can be reduced with a number of passive and active methods, which are generally prioritised at zero yaw, which is not entirely representative of the “on road” environment. As such, to combine a visually square geometry (at rest) with optimal drag reductions at non-zero yaw, an adaptive system that applies vertical side edge tapers independently is tested statically.
A parametric study has been undertaken in Loughborough University’s Large Wind Tunnel with the ¼ scale Windsor Model. The aerodynamic effect of implementing asymmetric side tapering has been assessed for a range of yaw angles (0°, ±2.5°, ±5° and ±10°) on the force and moment coefficients. This adaptive system reduced drag at every non-zero yaw angle tested, from the simplest geometry (full body taper without wheels) to the most complex geometry (upper body taper with wheels) with varying levels of success; providing additional drag reductions from 3% to 125%. The system also shows potential to beneficially modify the cross wind stability of the geometry.

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

On the Mechanical Design of the Rolling Road Addition to the CSUF Wind Tunnel

2019-01-0651

View Details

JOURNAL ARTICLE

Effects of Moving Ground and Rotating Wheels on Aerodynamic Drag of a Two-Box Vehicle

2018-01-0730

View Details

TECHNICAL PAPER

Measuring of Long Truck Models in a Wind Tunnel with External Balance

2008-01-1202

View Details

X