Abstract: Systems and methods for the protection of a surface adjacent to an exhaust system are presented herein. The system may comprise an ejector, an ejector inlet, and a ejector shroud, and a shroud outlet. The ejector may include the exhaust nozzle of an engine. The should outlet is in fluid communication with the atmosphere. The adjacent surface may partially bound a region proximate to and downstream of the shroud outlet. The system may further comprise a plurality of forced mixing lobes that extend from the engine exhaust nozzle in a region spaced apart from the adjacent surface. The distribution of the lobes may be asymmetric in the cross section of the ejector shroud proximate to the shroud outlet.