Base Pressure of Oscillating Circular Cylinders

by Peter K. Stansby, Lect.; Civ. Engrg. Dept., Univ. of Salford, Salford, England,

Serial Information: Journal of the Engineering Mechanics Division, 1976, Vol. 102, Issue 4, Pg. 591-600

Document Type: Journal Paper


Experiments have been made to investigate the base pressure coefficients of circular cylinders oscillating transversely in a stream for a wide range of cylinder amplitudes and frequencies. This is thought to give a good indication of the variation in drag coefficient. The locking-on of vortex shedding at the cylinder frequency, associated with vortex-induced vibrations, was carefully studied. Locking-on at a third of the cylinder frequency was found to produce especially low base pressures, i.e., high drags.

Subject Headings: Oscillations | Cylinders | Vortex shedding | Drag (fluid dynamics) | Rivers and streams | Vibration

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