Abstract
The results of an experimental study of the natural disturbance development in a flat plate boundary layer with a wavy surface are presented. The model of a flat steel plate with a blunt radius of the leading edge r = 0.34 mm was used. To create a wavy surface on the model, longitudinal roughness elements were applied. They were additionally coated with a film to align the side sections of the roughness and give them a rounded shape. For these experimental conditions, no influence of the surface waviness on the position of the laminar-turbulent transition in the flat plate boundary layer was detected.
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