Vortex shedding from long slender cylinders in near-axial flow

Abstract

It has been found that vortex shedding can occur from long cylinders at small angles of yaw, i.e. in near-axial flow. The range of Reynolds number over which this can take place has been determined for yaw angles between 0° and 10°. Results for vortex-shedding frequencies are also presented, and compared with existing data for larger yaw angles. It is suggested that the phenomenon may be relevant to turbulence-generation mechanisms in thick axisymmetric turbulent boundary layers.