Exhaust flow deflector

A deflector is reported for reducing swirling flow spillover occurring when gas flowing through curved ducting attempts to exit into a freestream flow. The deflector is arcuately shaped and positioned upstream and adjacent the exit end of the curved ducting. As the freestream flow travels over the surface of the deflector, it is turned toward the direction of the flow from the exit of the ducting and draws the exiting flow along with it. The drawn exit flow is straightened and strengthened and is able to penetrate into the freestream flow. The ends of the deflector generate vortices which draw along the swirling flow at the sides of the exit end and straighten and strengthen it also.