Browse Publications Technical Papers 2001-01-1267
2001-03-05

The COANDA Flow Control and Newtonian Concept Approach to Achieve Drag Reduction of Passenger Vehicle 2001-01-1267

In order to reduce total drag during aerodynamic optimization process of the passenger vehicle, induced drag should be minimized and pressure drag should be decreased by means of applying streamlined body shape. The reduction of wake area could decrease pressure drag, which was generated by boundary layer separation. The induced drag caused by rear axle lift and C-pillar vortex can be reduced by the employing of trunk lid edge and kick-up or an optimized rear spoiler. When a rear spoiler or kick-up shape was installed on the rear end of a sedan vehicle, drag was reduced but the wake area became larger. This contradiction cannot be explained by simply using Bernoulli’s principle with equal transit or longer path theory. Newtonian explanation with COANDA effect is adopted to explain this phenomenon. The relationships among COANDA effect, down wash, C-pillar vortex, rear axle lift and induced drag are explained.

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

A Prediction Method for Spoiler Performance

770459

View Details

JOURNAL ARTICLE

Adjoint Method for Aerodynamic Shape Improvement in Comparison with Surface Pressure Gradient Method

2011-01-0151

View Details

TECHNICAL PAPER

Accuracy in Computational Aerodynamics Part 1: Stagnation Pressure

980037

View Details

X