The circular cylinder in subsonic and transonic flow

Abstract

This paper provides new results describing compressible fluid flow around a cylinder. The investigation was restricted to subsonic and transonic flow at Reynolds numbers of about 10s. The experiments showed that a strong coupling exists between the flow over a cylinder and the vortex street formed in the near wake. The phenomenon was investigated using high-speed visualization synchronized with unsteady pressure measurements. Various coupling regimes were classified and instantaneous pressure distributions were obtained at different times during the vortex street period. From these elements it was possible to deduce the unsteady force.