| Sonstiges: |
- Nachgewiesen in: USPTO Patent Applications
- Sprachen: English
- Document Number: 20160076772
- Publication Date: March 17, 2016
- Appl. No: 14/486289
- Application Filed: September 15, 2014
- Assignees: JEREMY METTERNICH (Wellington, FL, US), MIRKO R. BOTHIEN (Zurich, CH), KHALID OUMEJJOUD (Palm Beach Gardens, FL, US), DWAIN P. TERRELL (Jupiter, FL, US)
- Claim: 1. A dome assembly for a gas turbine combustion system comprising: a dome plate having a generally hemispherical cross section, the dome plate encompassing an inlet to a combustion liner; a plurality of openings in the dome plate where each opening has a diameter and a neck length; a plurality of dome dampers extending in a direction away from the dome plate, opposite of the combustion liner, each of the dome dampers encompassing a respective opening in the dome plate and comprising: a damper body having a cavity located therein; a coverplate secured to at least an end of the damper body to form a damper volume; and a plurality of purge holes located about the damper body.
- Claim: 2. The dome assembly of claim 1, wherein the plurality of openings are oriented on the dome plate so as to be parallel with a central axis of the gas turbine combustion system.
- Claim: 3. The dome assembly of claim 2, wherein the dome dampers are oriented in an annular array about the central axis.
- Claim: 4. The dome assembly of claim 1, wherein the damper body is generally cylindrical in cross section.
- Claim: 5. The dome assembly of claim 1, wherein the coverplate is removably secured to the damper body by one of the group comprising a snap ring, clip, threaded body or bolt.
- Claim: 6. The dome assembly of claim 4, wherein the purge holes are located about a circumference of the cylindrical body or in the coverplate.
- Claim: 7. The dome assembly of claim 1, wherein the damper body consists of a resonator box.
- Claim: 8. The dome assembly of claim 7, wherein the coverplate of the resonator box is bolted to the dome assembly.
- Claim: 9. The dome assembly of claim 1, wherein the diameter to neck length ratio ranges from 0.2 to 2.0.
- Claim: 10. The dome assembly of claim 1, wherein the dome dampers are capable of controlling both high and low frequencies.
- Claim: 11. The dome assembly of claim 1, wherein the dome dampers have different damper volumes.
- Claim: 12. A gas turbine combustion system comprising a generally cylindrical combustion liner having a central axis and located coaxial to and radially within a flow sleeve, the combustion liner having an inlet end and an opposing outlet end; a set of main fuel injectors positioned radially outward of the combustion liner and proximate an upstream end of the flow sleeve; a combustor dome assembly encompassing the inlet end of the combustion liner and extending from proximate the set of main fuel injectors to a dome plate having a generally hemispherical-shaped cross section, the dome plate positioned a distance forward of the inlet end of the combustion liner and turning to extend a distance into the combustion liner, the combustor dome assembly comprising: a plurality of openings in the dome plate with each of the openings having a diameter and a neck length; a plurality of dome dampers extending in a direction away from the dome plate, opposite of the combustion liner, each of the dome dampers encompassing a respective opening in the dome plate and comprising: a damper body having a cavity located therein; a coverplate secured to at least an end of the damper body to form a damper volume; and a plurality of purge holes located about the damper body.
- Claim: 13. The dome assembly of claim 12, wherein the coverplate is removably secured to the damper body by a fastener selected from the group comprising a snap ring, clip, threaded body or bolt.
- Claim: 14. The dome assembly of claim 12, wherein the damper body is generally cylindrical in cross section.
- Claim: 15. The dome assembly of claim 12, wherein the damper body comprises a resonator box.
- Claim: 16. The dome assembly of claim 12, wherein the dome dampers are oriented in an annular array about the central axis.
- Claim: 17. The dome assembly of claim 12, wherein the diameter to neck length ratio ranges from 0.2 to 2.0.
- Claim: 18. A method of regulating combustion dynamics in a gas turbine combustor comprising: providing a combustion system having a combustor dome assembly having a dome plate with a plurality of openings in the dome plate, the plurality of openings having a diameter and a neck length, and a plurality of dome dampers encompassing respective openings in the dome plate; determining one or more desired combustion frequencies to control; determining a desired volume for the plurality of dome dampers to obtain the one or more desired combustion frequencies; determining a desired purge air flow to pass into the plurality of dome dampers; and, securing a coverplate to at least an end of each dome damper to form the desired volume within each of the dome dampers, the desired volume providing a sufficient volume to adequately dampen pressure fluctuations within the combustion system;
- Claim: 19. The method of claim 18 further comprising determining whether the desired volume of each of the dome dampers is sufficient and, where upon a determination that the volume of the dome dampers is insufficient, one or more of the neck length, the diameter, or the desired volume is altered.
- Claim: 20. The method of claim 18, wherein the desired volume for the plurality of dome dampers comprises two or more volumes of different sizes so as to control two or more corresponding combustion frequencies.
- Claim: 21. A dome assembly for a gas turbine combustion system comprising: a dome plate having a generally hemispherically-shaped cross section, the dome plate comprising an inlet to a combustion liner and having a plurality of openings therein, each opening having a first diameter; an adaptor plate positioned adjacent to the dome plate comprising: a forward face; an aft face; a first plurality of plate openings in the adapter plate; a second plurality of plate openings in the adapter plate; one or more resonator boxes extending from the adapter plate and encompassing one or more of the first plurality of plate openings in the dome plate; a plurality of dome dampers extending from the adapter plate and into the one or more resonator boxes, each of the dome dampers positioned within one of the first plurality of plate openings in the dome plate.
- Claim: 22. The dome assembly of claim 21, wherein the dome damper extends through an opening in the adapter plate and an opening in the dome plate.
- Claim: 23. The dome assembly of claim 21, wherein the adapter plate is removably secured to the dome plate.
- Claim: 24. The dome assembly of claim 21, wherein the adapter plate further comprises a contoured portion in the aft face for mating the adapter plate to the dome plate.
- Current International Class: 23; 23; 23
|
