On the Application of Classical Wind Tunnel Corrections for Automotive Bodies AUDI AG

Format:

Conference/Event

Author/Creator:

Wickern, Gerhard, author.

Conference Name:

SAE 2001 World Congress (2001-03-05 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2001

Summary:

The classical theory of wind tunnel corrections calculated from potential flow theory is revisited. In this context a flow model uniformly valid for all types of test sections is developed for the correction of drag in automotive wind tunnels. To define and size the singularities setting up the flow model only geometrical properties of the model and measured force coefficients will be used. To achieve a correct representation of the flow about a vehicle body a number of improvements to the classical approach are proposed. Based on the uniformly valid flow model, correction formulae for closed wall, open jet and slotted wall test sections are given. For the open jet and slotted wall case it is shown, that the presented formulae are still incomplete, whereas for the closed wall case the correction is ready to use. The correction approach is validated step by step by comparison with appropriate experimental data.Possible benefit of the correction is not only the ability to correct for unwanted wall interference effects, but also an improved understanding of wind tunnel test section design items. This can be utilized for an optimized design for new tunnels as well as for improvements of existing facilities

Notes:

Vendor supplied data

Publisher Number:

2001-01-0633

Access Restriction:

Restricted for use by site license