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Wake Surveys Behind a Passenger Car Subjected to a Transient Cross-Wind Gust
Technical Paper
2000-01-0874
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
SAE 2000 World Congress
Language:
English
Abstract
Transient wake surveys have been conducted on a generic three dimensional vehicle shape. The flow conditions were those generated by the unique crosswind facility at Durham University, which imitates a vehicle passing through a sharp-edged, finite length cross-wind gust. Each survey consisted of some 7000 cross-wind gusts, with each point in the wake being phase-averaged over 20 gusts. The surveys clearly show the development of the wake structure from the familiar axial flow conditions, through the transient to a nominally steady yawed flow. Although both the structure and total pressure loss that develop in the wake flow are comparable to those found for quasi-steady flow conditions, the developing flow reveals characteristics that are not found in the quasi-steady measurements. New data are also presented with regard to the character of the gust that develops in this wind tunnel and their impact upon the reported wake measurements is discussed.
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Authors
Citation
Ryan, A. and Dominy, R., "Wake Surveys Behind a Passenger Car Subjected to a Transient Cross-Wind Gust," SAE Technical Paper 2000-01-0874, 2000, https://doi.org/10.4271/2000-01-0874.Also In
SAE 2000 Transactions Journal of Passenger Cars - Mechanical Systems
Number: V109-6; Published: 2001-09-15
Number: V109-6; Published: 2001-09-15
References
- Macklin, A.R. Garry, K.P. Howell, J.P. Comparing Static and Dynamic Testing Techniques for the Cross-Wind Sensitivity of Road Vehicles SAE paper 960674 1996
- Dominy, R.G. Ryan, A. An Improved Wind Tunnel Configuration for the Investigation of Aerodynamic Cross-Wind Response SAE paper 1999-01-0808 1999
- Ahmed, S.R. Ramm, G. Faltin, G. Some Salient Features of the Time-Averaged Ground Vehicle Wake SAE paper 840300 1984
- Ahmed, S.R. Baumert, W. The Structure of Wake Flow Behind Road Vehicles Aerodynamics of Transportation, ASME - CSME Conference Niagara Falls 1979
- Davis, J.P. Wind Tunnel Investigation of Road Vehicle Wakes. PhD Thesis University of London 1982
- Nouzawa, T. Hiasa, K. Nakamura, T. Kawamoto, A. Sato, H. Unsteady-Wake Analysis of a Notchback Model with Critical Afterboby Geometry SAE paper 920202 1992
- Williams, J. Quinian, W.J. Hackett, J.E. Thompson, S.A. Marinaccio, T. Roberston, A. A Calibration Study of CFD for Automotive Shapes and CD SAE paper 940323
- Duell, E., George, A.R. Experimental Study of a Ground Vehicle Body Unsteady Near Wake SAE paper 1999-01-0812
- Sims-Williams, D.B. Dominy, R.G. Experimental Investigation into Unsteadiness and Instability in Passenger Car Aerodynamics SAE paper 980391 1998
- Docton, M.K.R. The Simulation of Transient Crosswinds on Passenger Vehicles. PhD Thesis University of Durham 1997