Paper_2006_01_0338.pdf (1.26 MB)
The measurement of transient aerodynamics using an oscillating model facility
journal contribution
posted on 2010-10-13, 09:31 authored by Martin Passmore, Shuhaimi MansorA method for the estimation of transient aerodynamic data from dynamic wind tunnel tests has been developed and employed in the study of the unsteady response of simple automotive type bodies. The paper describes the facility and analysis techniques employed
and reports the results of a parametric study of model rear slant angle and of the influence of C-pillar strakes. The model is shown to exhibit damped, self-sustained
and self-excited behaviour. The transient results are compared with quasi-steady predictions based on conventional tunnel balance data through the calculation
of derivative magnification factors. For all slant angles tested the results show that the quasi-steady prediction is a poor estimate of the real transient behaviour. In
addition the slant angle is shown to have significant effect on the level of unsteadiness. The addition of Cpillar
strakes is shown to stabilise the flow with even small height strakes yielding responses well below that of steady-state.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering
Citation
NEWNHAM, P. ... et al., 2006. The measurement of transient aerodynamics using an oscillating model facility. Transactions of the Society of Automotive Engineers: Journal of Passenger Cars: Mechanical Systems, 115, 2006, Paper No. 2006-01-0338.Publisher
© SAE InternationalVersion
- VoR (Version of Record)
Publication date
2006Notes
Copyright © 2006 SAE International. This paper is posted on this site with permission from SAE International, and is for viewing only. Further distribution and use of this paper is not permitted without permission from SAE. This paper was part of the 2006 SAE World Congress, Detroit, Michigan, April 3rd-6th 2006.ISSN
0148-7191Publisher version
Language
- en