Control of cross-wind forces on a finite circular cylinder at subcritical Reynolds number

Abstract

The present work is an experimental study of flow past a finite circular cylinder, carried out in a low speed wind tunnel. Force measurement was carried-out to study the effect of free end on static and dynamic behaviour of finite cylinders of different aspect ratios from 6 to 14. PIV measurement was also carried-out to observe the nature of flow near the free end of the finite cylinder. A strong downwash and back-flow was observed in the central wake plane near the free end. Based on the observations, a thin circular disc has been implemented as a flow control device, which has been found to be effective in suppression of the cross-wind force.