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Vortex shedding lock in due to pitching oscillation of a wind turbine blade section at high angles of attack

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Figure

Figure 1: two translational (transverse and streamwise, i.e.,
Figure 2: Flow field domain: dimensions and boundary conditions.
Figure 3: Detail of the time record of the lift force coefficient at α = 140°, for different frequency ratios showing the effect of lock-out (a) andlock-in (b).
Figure 10: Comparison of predicted lock-in boundaries for alower boundary (current implementation); lock-in region (currentcircular cylinder: □, upper boundary (current implementation); ∇,implementation) (in green) and [32] (in black line).
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