Combustor acoustic damping structure

A gas turbine engine, the gas turbine engine comprising:

• a combustor assembly comprising:
• an annular bulkhead adjacent to a diffuser cavity and upstream of an annular dome assembly adjacent to a combustion chamber;
• a damper comprising:
• a first walled enclosure that comprises a first wall coupled to the annular dome assembly, and
• a second walled enclosure that comprises a second wall that is not part of the first walled enclosure and that is coupled to the first walled enclosure,
• wherein the first walled enclosure defines a first cavity and a hot side orifice adjacent to the combustion chamber,
• wherein the second walled enclosure defines a second cavity and a second opening adjacent to the diffuser cavity,
• wherein the damper is disposed between the annular bulkhead and the annular dome assembly of the combustor assembly,
• wherein the first walled enclosure of the damper further comprises a first walled tube extended from the first cavity through the annular dome assembly, and wherein the first walled tube defines a first opening adjacent to the combustion chamber and in fluid communication with the first cavity, and
• wherein the annular dome assembly defines a gap between the first walled tube and the deflector through which a portion of air flows from the diffuser cavity to the combustion chamber.

A gas turbine engine, the gas turbine engine comprising:

• a combustor assembly comprising:
• an annular bulkhead adjacent to a diffuser cavity and upstream of an annular dome assembly adjacent to a combustion chamber;
• a damper comprising:
• a first walled enclosure that comprises a first wall coupled to the annular dome assembly, and
• a second walled enclosure that comprises a second wall that is not part of the first walled enclosure and that is coupled to the first walled enclosure,
• wherein the first walled enclosure defines a first cavity and a hot side orifice adjacent to the combustion chamber,
• wherein the second walled enclosure defines a second cavity and a second opening adjacent to the diffuser cavity, and
• wherein the damper is disposed between the annular bulkhead and the annular dome assembly of the combustor assembly,
• wherein the second cold side walled tube is the only opening of the second walled enclosure, and
• wherein the second walled enclosure of the damper further comprises a second cold side walled tube extended into the second cavity and/or the diffuser cavity.