Technologies for the Suppression of Combustion Instability or Screech

Innovative passive liner damping design concept(s) to damp low and high order screech modes simultaneously in legacy, pipeline, and advanced military afterburners are proposed for development and demonstration in this SBIR project. The proposed innovative passive damping liner design concept(s) are very retrofittable and implementable in any current or future augmentor systems without adding complexity and weight to the system or requiring supplemental cooling air. The proposed innovative liner design concept(s) would be capable of suppressing/attenuating transverse low frequency instability experienced by advanced military large engine augmentors for which liners of conventional design are an impractical solution because of the large volumes required for the liner annular cavity to suppress such instability.