Unsteady circulation control aerodynamics of a circular cylinder with periodic jet blowing

Abstract

An experimental investigation was conducted into the unsteady circulation control aerodynamics of a circular cylinder with periodic tangential blowing from a narrow spanwise slot. Both steady and unsteady surface pressure data were obtained for a variety of slot angles, blowing frequencies, and mean blowing coefficients. The experiments were run both transition free and transition fixed. Measurements were made of the time-dependent pressures at discrete points around the cylinder and were numerically integrated to estimate the unsteady lift and pressure drag at a section at midspan