Patent ID: 7383685

Claim:
A method of passively suppressing exhaust, comprising: passing exhaust through a primary nozzle; passing exhaust from the primary nozzle through a secondary nozzle at an exit of the primary nozzle offset laterally from the entrance of the secondary nozzle, wherein the secondary nozzle comprises an internal side with a convex contour positioned at the exit of the primary nozzle and adapted to permit exhaust exiting the primary nozzle and substantially directed at a tangent to the convex contour to attach to the convex contour; causing exhaust exiting the primary nozzle to attach to the convex contour of the internal side of the secondary nozzle; and inducing a flow of cooling air along the outside of the primary nozzle and into the secondary nozzle by the flow of exhaust passing through the primary and secondary nozzles.