Damper arrangement for reducing combustion-chamber pulsation
The invention concerns a damper arrangement for reducing combustion-chamber pulsation arising inside a gas turbine, wherein the gas turbine includes at least one compressor, a primary combustor which is connected downstream to the compressor, and the hot gases of the primary combustor are admitted at least to an intermediate turbine or directly or indirectly to a secondary combustor. The hot gases of the secondary combustor are admitted to a further turbine or directly or indirectly to an energy recovery, wherein at least one combustor is arranged in a can-architecture. At least one combustor liner includes air passages, wherein at least one of the air passages is formed as a damper neck. The damper neck being actively connected to a damper volume, and the damper volume is part of a connecting duct extending between a compressor air plenum and the combustor.
1. A damper arrangement for a gas turbine, the gas turbine including a compressor, a primary combustor connected downstream to the compressor and including a combustion chamber, and configured so that hot gases of the primary combustor are admitted at least to an intermediate turbine or directly or indirectly to a secondary combustor, and hot gases of the secondary combustor are admitted to a further turbine or directly or indirectly to an energy recovery, the damper arrangement, comprising:
at least one combustor liner including a plurality of air passages for injecting a fluid into hot combustion products in between the primary combustor and the secondary combustor, wherein at least one of the air passages of the plurality of air passages is formed as a first damper neck, the first damper neck being connected to a first damper volume, wherein the first damper volume is an annular single chambered connecting duct extending between a compressor air plenum and the primary combustor, the first damper neck and the first damper volume configured to reduce pulsations of the combustion chamber wherein a fuel injector extends through the annular single chambered connecting duct.
2. The damper arrangement as claimed in claim 1 , wherein the primary and secondary combustor are arranged in a can-architecture.
3. The damper arrangement as claimed in claim 1 , wherein the primary combustor is arranged in an annular-architecture.
4. The damper arrangement as claimed in claim 1 , wherein the secondary combustor is arranged in an annular-architecture.
5. The damper arrangement as claimed in claim 1 , wherein the primary and the secondary combustor are arranged in an annular-architecture.
6. A damper arrangement as claimed in claim 1 , wherein the air passages possess a circular, oval, slotted, rectangular, triangular, or polygonal flow cross section.
7. A damper arrangement as claimed in claim 1 , comprising a plurality of first damper necks, the first damper neck being included in the plurality of first damper necks, wherein the plurality of first damper necks are arranged in a circumferential or quasi-circumferential direction with respect to the at least one combustor liner.
8. A damper arrangement as claimed in claim 1 , comprising a plurality of first damper necks, the first damper neck being included in the plurality of first damper necks, wherein the plurality of first damper necks are arranged in a plurality of rows in a mutually spaced manner on a surface of the at least one combustor liner.
9. A damper arrangement as claimed in claim 1 , wherein the first damper volume is disposed in circumferential or quasi-circumferential direction with respect to the at least one combustor liner.
10. A damper arrangement as claimed in claim 1 , wherein the first damper neck bridges radially or quasi-radially an interspace from an adjacent or outside damper volume to the at least one combustor liner or to the air passages.
11. A damper arrangement as claimed in claim 1 , wherein the first damper neck is disposed flush with an exterior wall of the at least one combustor liner.
12. The damper arrangement as claimed in claim 1 , wherein a part of the first damper neck is disposed in an interior of the combustion chamber of the primary combustor and possesses a straight or an angled orientation.
13. A damper arrangement as claimed in claim 1 , wherein the primary and/or secondary combustor has at least one premix burner.
14. A damper arrangement as claimed in claim 1 , wherein the first damper neck penetrates into the interior of the combustion chamber.
15. The damper arrangement as claimed in claim 1 , comprising:
a second damper volume arranged concentrically with the first damper volume;
and at least one second damper neck connected to the second damper volume.
16. The damper arrangement as claimed in claim 1 , wherein the first damper neck includes the following dimensions or relations: a length greater than or equal to 5 mm and a cross-sectional area greater than 5 mm 2 .
17. The damper arrangement as claimed in claim 1 , wherein the plurality of air passages includes dilution air holes and a sum of fluid flows injected by the air passages is in a range of 5 to 50% of a mass flow rate of combustion products of the primary combustor.