Experimental study of nonsteady asymmetric flow around an ogive-cylinder at incidence

Flow visualization, surface-mounted pressure transducers, and hot-wire anemometers have been used to measure the leeside vortex flowfield on an ogive-cylinder at high angles of attack. Results show that there is a high degree of flowfield unsteadiness arising from several phenomena. The phenomena include large-scale von Karman vortex shedding, high-frequency pressure and velocity fluctuations indicative of the presence of free shear-layer vortices, and a vortex interaction. The effects of axial position, angle of attack, and wind-tunnel speed on the surface pressure and velocity in the wake were investigated