Abstract
Abstract The interaction of a spanwise vortex with a flat plate was investigated experimentally in a wind tunnel. The vortex was produced by a vortex generator airfoil pitching in a tailored non-sinusoidal schedule. The smoke-wire visualization technique and unsteady surface pressure measurements were used to examine the interaction for plates having different leading-edge configurations. The results focus on transient variations of the flow structure and pressure distribution over the plate with the vortex position during the interaction. In comparison with the sharp and elliptical leading-edge plates, it was found that the passage of the vortex has a much stronger effect on the amplitude of unsteady loading for the plate with a square leading edge, primarily due to the deformation of the leading-edge separation bubble. For the examined range of vertical separation distance between the incident vortex and the test plate, it was also found that the amplitude of plate lift variation during the interaction decreases approximately linearly with the separation distance.
Published Version
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