In the paper are reported the first results of the experimental analysis on the transverse flow-induced vibration of an elastically mounted rigid sphere in a free surface steady flow. Experiments have been conducted in presence of three-dimensional flow field and low relative submergence, and the oscillating system characterized by low mass ratio (m*), relatively high combined mass-damping parameter (m*), small amplitude (A/D < 1) and high Reynolds numbers (100,000). The observations and data analysis have out-lined a different behavior between the test case of sphere and the results reported in literature mainly referred to cylinders concerning lock-in and hysteresis phenomena.

Transverse vibrations of an sphere at high combined mass-damping parameter

MIRAUDA, DOMENICA;GRECO, Michele
2003-01-01

Abstract

In the paper are reported the first results of the experimental analysis on the transverse flow-induced vibration of an elastically mounted rigid sphere in a free surface steady flow. Experiments have been conducted in presence of three-dimensional flow field and low relative submergence, and the oscillating system characterized by low mass ratio (m*), relatively high combined mass-damping parameter (m*), small amplitude (A/D < 1) and high Reynolds numbers (100,000). The observations and data analysis have out-lined a different behavior between the test case of sphere and the results reported in literature mainly referred to cylinders concerning lock-in and hysteresis phenomena.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11563/17103
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