1984-02-01

Some Salient Features Of The Time-Averaged Ground Vehicle Wake 840300

For a basic ground vehicle type of bluff body, the time averaged wake structure is analysed. At a model length based Reynolds number of 4.29 million, detailed pressure measurements, wake survey and force measurements were done in a wind tunnel. Some flow visualisation results were also obtained. Geometric parameter varied was base slant angle. A drag breakdown revealed that almost 85 % of body drag is pressure drag. Most of this drag is generated at the rear end.
Wake flow exhibits a triple deck system of horseshoe vortices. Strength, existence and merging of these vortices depend upon the base slant angle.
Characteristic features of the wake flow for the low drag and high drag configurations is described. Relevance of these phenomena to real ground vehicle flow is addressed.

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

Flow and Turbulence Structure in the Wake of a Simplified Car Model

2003-01-0656

View Details

TECHNICAL PAPER

Experimental and Computational Investigation of Ahmed Body for Ground Vehicle Aerodynamics

2001-01-2742

View Details

TECHNICAL PAPER

An Improved Wind Tunnel Configuration for the Investigation of Aerodynamic Cross Wind Gust Response

1999-01-0808

View Details

X