Abstract
An experimental study of a perching maneuver performed by a flat plate at Re – 35,000 is presented in this paper. The autonomous perching maneuver of a UAV that consists of a pitch-up motion at moderate pitching rate is used in the study. Experiments were conducted at the University of Michigan’s low-turbulence water channel facility in two different phases. The first phase was flow visualization by dye injection. The second phase was flow field calculation using 2D phase-averaged particle image velocimetry (PIV). The behavior of the flow field was studied at 50% and 75% span-wise locations during each phase. The formation of a separation bubble followed by the shedding of the trailing edge vortex (TEV) is observed. Vorticity is introduced at the leading edge of the flat plate, and can be traced downstream and observed in the recirculation zone.
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