The study of the flow behavior within an inter-compressor channel has become an increasingly interesting material in new generation engine configurations. The big difference in the diameters of the low and high-pressure components requires an annular connection channel that increases its geometric aggressiveness more and more. In addition to the centrifugal effects deriving from the shape of the channel itself, the presence of blades inside the duct exerts a high influence. These faired devices are necessary for the passage of various wiring and equipment and for the redirection of the flow to provide the cleanest and uniform input to the downstream modules.