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Lent by Langley Research Center
A series of wedge shapes were tested at hypersonic speed of Mach 6 to
6.9 to investigate leeward side vortex generation. The white patterns
on the different wedge shapes give a visual interpretation of surface
flows, which help identify flow problem areas and show the airflow
around them. As air bends around a body it creates swirling patterns,
or vortices, which change the way in which a vehicle flies through the
air. The white patterns are made using white oil and paint mixture,
which initially painted on the model, is blown around the model by the
airflow. The mixture is blown from the high-pressure areas and collects
in the low-pressure areas.
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