Patent ID: 11867139
Assignee: BLUE ORIGIN, LLC
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 7:
8. An acoustic liner configured to control combustion instability in a rocket engine, the acoustic liner comprising:
a plurality of identical cavities formed within the liner in a ring, each cavity comprising an exterior opening in an exterior surface of the liner, each cavity opening into an interior surface of the liner through a plurality of orifices; and
a first modular damper plug and a second modular damper plug according to claim 1, the first modular damper plug received in a first cavity of the plurality of cavities to form a first acoustic resonator having a first downstream volume, wherein the second modular damper plug has a length that is greater than the length of the first modular damper plug, the second modular damper plug received in a second cavity of the plurality of cavities to form a second acoustic resonator having a second downstream volume that is less than the first downstream volume of the first acoustic resonator.