Dynamic response of the flow induced vibration of smooth and rough single cantilever circular cylinders

Abstract EN

The effects of su!"face roughness and turbulence intensity on the dynamic characteristics of flow induced oscillation of a cantilever single circular cylinder in a cross air flow were experimentally investigated.

Measurements of the dimensionless vibration amplitude in the transverse (lift) and streamwise (drag) directions were undertaken and found to be very much dependent on both freestream turbulence intensity and surface roughness.

It was found that, in general, increasing the turbulence intensity tends to increase the vibration amplitude in the transverse direction and to decrease it in the streamwise direction.

The effect of surface roughness is to reduce the dimensional vibration amplitude in both directions.