Influence of Test-Section Length and Collector Area on Measurements in -Open-Jet Automotive Wind Tunnels Porsche AG

Format:

Conference/Event

Author/Creator:

von Schulz-Hausmann, Friedrich K., author.

Conference Name:

SAE International Congress & Exposition (1988-02-29 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1988

Summary:

A detailed investigation of aerodynamic car testing in -open-test-sections was made. Herein two main influencing variables (dimensionless length scales) could be identified: first, the relative length of the -open-test-section influences the static pressure gradient along the x-axis and, second, the relative collector area has large effects on the wake of a car. The measured values (id est drag) are mainly determined by a combined effect of these two parameters. The basic investigation was made in the Porsche 1:4 model-wind-tunnel with two different types of vehicles {sportscar and van) and in two different scales (1:4, 1:5). The results are graphically summarized. This diagram can predict the differences between full size open-jet-wind-tunnels. These predictions were verified by measuring Porsche production cars and the Porsche calibration car in three other automotive wind-tunnels

Notes:

Vendor supplied data

Publisher Number:

880251

Access Restriction:

Restricted for use by site license