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The Wind Tunnel's Ground Plane Boundary Layer - Its Interference with the Flow Underneath Cars
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Abstract
In order to determine the best way to simulate a road in the full-scale climatic wind tunnel of the Voklswagenwerk AG, a series of comparative tests between road and tunnel have been carried out. In general, a good correlation was achieved when a rigid ground plane was used for road simulation. Only a small margin for improvement by boundary-layer control remains. From measurements reported in the literature, it can be seen that an effective reduction of the boundary-layer displacement thickness of 60% can be achieved with single-slot suction. Nevertheless, this would result in a hardly noticeable improvement of test-data correlation for cars with standard ground clearance. Therefore, it was decided not to install a boundary-layer suction in the wind tunnel of Volkswagenwerk AG.
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Hucho, W., Janssen, L., and Schwartz, G., "The Wind Tunnel's Ground Plane Boundary Layer - Its Interference with the Flow Underneath Cars," SAE Technical Paper 750066, 1975, https://doi.org/10.4271/750066.Also In
References
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