Experimental validation of the design guideline to prevent the failure of a thermometer well by vortex-induced vibration is presented, clarifying the effect of structure damping on displacement amplitudes of a cantilever cylinder. The available experimental data in piping are limited to those with small damping in water flow, because of the difficulty in increasing structure damping of the cantilever cylinders in experiments. In the present experiment, high-viscosity oil within cylinders is used to control their structure damping. Resulting values of reduced damping are 0.49, 0.96, 1.23, 1.98, and 2.22. The tip displacements of the cylinder induced by vortex vibration were measured in the range of reduced velocity from 0.7 to 5 (Reynolds number is at Cylinders with reduced damping 0.49 and 0.96 showed vortex-induced vibration in the flow direction in the region. However, in cases of reduced damping of 1.23, 1.98, and 2.22, the vibration was suppressed to less than 1 percent diameter. It is confirmed that the criteria of and for the prevention of vortex-induced vibration is reasonably applicable to a cantilever cylinder in a water flow pipe.
Experimental Study on the Avoidance and Suppression Criteria for the Vortex-Induced Vibration of a Cantilever Cylinder
Contributed by the Pressure Vessels and Piping Division and presented at the Pressure Vessels and Piping Conference, Atlanta, Georgia, July 22–26, 2001, of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS. Manuscript received by the PVP Division, July 12, 2001; revised manuscript received December 18, 2001. Editor: S. Y. Zamrik.
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Sakai, T., Morishita , M., Iwata , K., and Kitamura, S. (May 1, 2002). "Experimental Study on the Avoidance and Suppression Criteria for the Vortex-Induced Vibration of a Cantilever Cylinder ." ASME. J. Pressure Vessel Technol. May 2002; 124(2): 187–195. https://doi.org/10.1115/1.1465436
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