Fluidic Control of a Turret Wake, Part II: Aero-Optical Effects

This paper, along with a companion paper [1], investigates the effects of flow control actuation on aero-optical distortions in the near wake of a 0.6 meter in diameter hemisphereon-cylinder turret model placed on the side wall of a wind tunnel. The aero-optical environment was characterized using a Malley probe. The main objective of the current work was to assess the effectiveness of the active flow control in mitigating optical aberrations over a conformal optical window mounted on the turret for backward-looking elevation angles at subsonic Mach numbers. The paper presents the analysis of the aerooptical environment present for the baseline flow around the turret and the influence of that the different active-flow-control configurations have on that environment.