Flow induced oscillation of a set-in circular cylinder
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This work studies the fluid-structure interaction of a set-in, large aspect-ratio circular cylinder in cantilever subjected to a cross flow. Experiments were conducted in a water tunnel and observations were obtained using flow visualization techniques and direct observation of the deflection of the cylinder. The flow behavior was observed using dye injection. The experiments show that the dominant vibration of the cylinder is transversal to the flow direction, and that the first mode of vibration of the cylinder appears at a particular Reynolds number, which is a function of the mechanical properties of the cylinder. The deflection stops when the Reynolds number is increased. The peak deflection and frequency of oscillation, as a function of the Reynolds number, were also determined. The analysis shows a close relation between the frequency of oscillation and the frequency of appearance of a vortex shedding. For large deflections of the cylinder the flow structure is modified substantially, and the frequency at which vortex appears is different to the frequency that occurs for fixed cylinders. Copyright © 2010 by ASME.
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Aspect ratio; Circular cylinders; Deflection (structures); Experiments; Flow visualization; Mechanical engineering; Mechanical properties; Oscillating flow; Reynolds number; Vibrations (mechanical); Vortex shedding; Cross flows; Direct observation; Dye injection; Fixed cylinders; Flow behaviors; Flow direction; Flow-induced oscillation; Frequency of appearance; Frequency of oscillation; Large deflection; Water tunnel; Work study; Oscillating cylinders
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