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(Color online) Sketch view of the experimental setup: (a) top view, (b) side view, (c) side view with additionnal plexiglass plates and adhesive tapes to decrease the channel width.
(Color online) Typical evolution of the rms level of the displacement, measured at an arbitrary point near the clamped end of the plate; (○) increasing velocity, (□) decreasing velocity, L = 86 mm (a), H = 15 mm, C = 12 mm; (b) H = 8 mm, C = 16 mm.
(Color online) Evolution of the non-dimensional critical flow velocity for flutter instability U * as function of the aspect ratio h of the plate; (o) experimental data; (—) 3D c model; (– –) 3D ∞ model; (…) 2D model (infinite span). The experimental value of c is plotted as reference above.
(Color online) Evolution of the non-dimensional critical flow velocity for flutter instability U * as function of the non-dimensional gap c for three different plates. Plate 1: M * = 0.48, h = 0.16, (o), experiment; (– –) 3D c model. Plate 2: M * = 0.48, h = 0.2, (□) experiment; (– ·–·) 3D c model. Plate 3: M * = 0.53, h = 0.43, (Δ) experiment; (—) 3D c model. Thin lines indicate the values given by the 3D ∞ model, while the dotted line indicates the value given by the 2D model for M * = 0.5. Inset: U * − U 2 D plotted as function of cc in a log-log scale, showing that it is governed by a power law of the form c 0.15.
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