Flow Instability at Boundary Layer Separation on an Axisymmetric Body

In the present paper we summarize briefly our recent wind tunnel data on hydrodynamic instability at laminar flow separation from a body of revolution at low subsonic velocities. Previously, we presented visualization results on panoramic flow patterns close to the surface of axisymmetric body [1]. Here, we proceed with this topic focusing on hot-wire results which made clear the effects of instability in axisymmetric conditions and in 3D flow configurations which are generated at the test model at incidence. Also, implication of instability effects to separation control on bodies of revolution is of interest.