The effect of a perturbation on the flow over a bluff cylinder
- 1 July 1986
- journal article
- Published by AIP Publishing in Physics of Fluids
- Vol. 29 (7) , 2095-2102
- https://doi.org/10.1063/1.865596
Abstract
Measurements are presented of the frequency of vortex shedding from, in turn, a circular, a D-section cylinder, and a flat plate for a flow that has a single-frequency perturbation superimposed on its mean velocity component. It is found that over a range of velocities the vortex shedding locks-in to the frequency of the perturbation such that the shedding frequency is half the perturbation frequency. Also, the range of velocities for which lock-in occurs increases as the perturbation amplitude is increased. With lock-in, the mean base pressure is found to decrease, and measurements of the vortex shedding from the circular cylinder show that the correlation of vortex shedding increases. The changes associated with lock-in are found to be greatest for the circular cylinder.Keywords
This publication has 21 references indexed in Scilit:
- Vortex Shedding from Oscillating Bluff BodiesAnnual Review of Fluid Mechanics, 1984
- Vortex-Induced Oscillations: A Selective ReviewJournal of Applied Mechanics, 1979
- The 1976 Freeman Scholar Lecture: Some Current Research in Unsteady Fluid DynamicsJournal of Fluids Engineering, 1977
- Vortex shedding from a cylinder vibrating in line with an incident uniform flowJournal of Fluid Mechanics, 1976
- Contributions Some Aspects of the Oscillations of Full-Scale PilesPublished by Springer Nature ,1974
- Stability of a circular cylinder oscillating in uniform flow or in a wakeJournal of Fluid Mechanics, 1973
- On vortex excitation of model piles in waterJournal of Sound and Vibration, 1973
- Effect of an Oscillating Free Stream on the Unsteady Pressure on a Circular CylinderJournal of Fluids Engineering, 1973
- Periodic Flow PhenomenaAnnual Review of Fluid Mechanics, 1972
- The lift and drag forces on a circular cylinder oscillating in a flowing fluidProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1964