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

This paper presents the optical results of using combined passive and active flow control to improve the aero-optical environments around a conformal-window, hemisphere-oncylinder turret. Several wavefront sensors were used to directly measure optical distortions at several back-looking angles. It was shown that the hybrid flow control significantly reduces levels of optical distortions for elevation angles as high as 148 degrees at M = 0.3. The paper also devotes considerable attention to overcoming environmental conditions present in large-scale wind tunnels.

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