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A Study of Ground Simulation-Correlation between Wind-Tunnel and Water-Basin Tests of a Full-Scale Car
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English
Abstract
The aerodynamic properties of a full-scale car have been investigated in a wind-tunnel with upstream boundary layer suction, and in a water-basin where the car was rolling on the bottom. Measurements were carried out of the drag and lift forces, the static pressure distribution on the car body and the total head distribution between the car and the ground. By comparing data from the tunnel and the basin the ground simulation technique could be evaluated. The measured drag coefficients were found to be very similar in both facilities, while the absolute values of the lift coefficients were considerably higher in the tunnel. Lift differences due to configuration changes of the upperbody were essentially the same in the two facilities, while changes of the underbody caused smaller lift differences in the tunnel. In the project the water-basin technique was thoroughly investigated and proven.
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Citation
Larsson, L., Hammar, L., Nilsson, L., Berndtsson, A. et al., "A Study of Ground Simulation-Correlation between Wind-Tunnel and Water-Basin Tests of a Full-Scale Car," SAE Technical Paper 890368, 1989, https://doi.org/10.4271/890368.Also In
References
- Hackett J.E., Williams J.E., Baker J.B. & Wallis S.B.: On the Influence of Ground Movement and Wheel Rotation in Tests of Modern Car Shapes. 870245, SAE International Congress and Exposition, Detroit, 1987.
- Sardou M.: Reynolds Effect and Moving Ground Effect Tested in a Quarter Scale Wind-Tunnel over a High Speed Moving Belt. Journal of Wind-Engineering and Industrial Aerodynamics, 22, 1986.
- Sardou M.: The Sensitivity of Wind-Tunnel Data to a High-Speed Moving Ground for Different Types of Road Vehicles. 880246, SAE International Congress and Exposition, Detroit, 1988.
- Bearman P.W., DeBeer D., Hamidy E. & Harvey J.K.: The Effect of a Moving Floor on Wind-Tunnel Simulation of Road Vehicles. 880245, see [3].
- Hurst D.W. & Lilley G.M.: Some Measurements of the Underbody Flow of a Typical Advanced Ground Transport Vehicle Model. 880247, see [3].
- Carr G.W.: A Comparison of the Ground-Plane Suction and Moving Belt Ground Representation Techniques. 880249, see [3].
- Berndtsson A., Eckert W.T., Mercker E.: The Effect of Groundplane Boundary Layer Control on Automotive Testing in a Wind-Tunnel. 880248, see [3].
- Trägȧrdh P.: Automobile testing in Water - Pilot Project. SSPA Report No 4875, 1987 (in Swedish).
- Vorwaller M.L., Germane G.J.: Aerodynamic drag studies on rolling vehicles by underwater tow testing. 860091, SAE International Congress and Exposition, Detroit, 1986.
- Nilsson L-U., Berndtsson A.: The New Volvo Multi-Purpose Automotive Wind-Tunnel. 870249, see [1].
- Hucho W-H. (editor): Aerodynamics of Road Vehicles. Butterworths, 1986.