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Řízení vztlaku a odtržení na lopatkách vetrných elektrárenúčinkem vírů majících osy orientované ve směru proudění
 Tesař, Václav ; Kordík, Jozef ; Daněk, Martin
Paper describes two alternative versions of wind-turbine blade section models for tests in wind tunnel aimed at lift control at high angles of attack. They use synthetic jet (or hybrid-synthetic jet) exiting at 18 % of the chord length on the upper (suction) surface. Otherwise the two layouts are different. In version A the single synthetic jet issues from a continuous exit slit across the full span. In the other version B, a large number of small hybrid-synthetic jets exit in an anti-parallel manner (180 deg phase shift between neighbours) from a row of orifices, switched by an array of small fluidic valves inside the model. Rather surprisingly, despite the differences, the lift control in both layouts was found to be due to generation of vortices with streamwise orientation of their axes.
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