Vortex Shedding Characteristics of a Vibrating Circular Cylinder Placed between Two Walls

Abstract

The present paper describes mainly the wall effect on the vortex shedding characteristics of a circular cylinder, which is placed between two walls, and forcedly vibrated in the direction perpendicular to the flow. The investigation is based on a spectral analysis of output signals from a single hot wire located in the cylinder wake. From the measured results, four wake modes, including the locking-in phenomenon, were clarified in terms of the gap ratio and the forcing frequency.