The ability of nanosecond pulsed dielectric barrier discharge (DBD) actuators to control §ow separation was investigated on a NACA (National Advisory Committee for Aeronautics) 0015 pro¦le for velocities up to 24 m/s (Re = 230,000). The optimal location for the actuator was determined from oil §ow experiments. Moderate voltage levels were applied (3 and 6 kV) and the actuator was operated at frequencies ranging from 0.058 to 10 kHz in pulse and burst modes. The peak e¨ectiveness of the actuator occurred at reduced frequency values of around 1. Plasma in §uence was observed at all tested angles of attack (up to 26 • ) and the stall angle was delayed by 8 • .