Gas-turbine combustion chamber wall for a lean-burning gas-turbine combustion chamber
A gas-turbine combustion chamber wall for a lean-burning gas-turbine combustion chamber with a combustion chamber casing 2, 3 and several combustion chamber segments arranged in the combustion chamber casing 2, 3 and forming a combustion chamber wall 10 . Each of the combustion chamber segments is supplied with cooling air with film cooling via axial and/or radial cooling holes 16, 17 , with the cooling holes 16, 17 being axially spaced from each other and with dampening openings 19 a being provided in this area for the introduction of cooling air.
1. A gas-turbine combustion chamber wall for a lean-burning gas-turbine combustion chamber, comprising:
a combustion chamber casing;
several combustion chamber segments arranged in the combustion chamber casing and forming a combustion chamber wall, each of the combustion chamber segments being supplied with cooling air with film cooling via at least one of axial cooling holes and radial cooling holes, with the cooling holes being axially spaced from each other; and
dampening openings being provided in the combustion chamber wall for the introduction of air;
wherein the combustion chamber segments are of a double-wall design and at least one includes a damper casing arranged radially outward and forming a circumferential dampening volume;
wherein one end of the damper casing is firmly attached to the combustion chamber segment and an other end is slideably connected to the combustion chamber segment.
2. A gas-turbine combustion chamber wall in accordance with claim 1 , wherein each of the combustion chamber segments is annular and conical.
3. A gas-turbine combustion chamber wall in accordance with claim 2 , wherein the combustion chamber segments overlap each other in their edge zones.
4. A gas-turbine combustion chamber wall in accordance with claim 3 , wherein the combustion chamber segments are arranged closely to a zone of maximum heat release of the gas turbine combustion chamber.
5. A gas-turbine combustion chamber wall in accordance with claim 3 , wherein the combustion chamber segments are arranged centrally between burners and turbine inlet vanes.
6. A gas-turbine combustion chamber wall in accordance with claim 1 , wherein the circumferential dampening volume of the damper casing is at least partly filled with air-permeable material.
7. A gas-turbine combustion chamber wall in accordance with claim 1 , wherein the combustion chamber wall is made of metal.
8. A gas-turbine combustion chamber wall in accordance with claim 1 , wherein the combustion chamber wall is made of ceramics.
9. A gas-turbine combustion chamber wall in accordance with claim 1 , wherein the combustion chamber wall is made of CMC.
10. A gas-turbine combustion chamber wall in accordance with claim 1 , and further comprising effusion cooling holes arranged between the dampening openings, which essentially extend perpendicularly through the combustion chamber wall, with the effusion cooling holes being oriented at a shallow angle to a surface of the combustion chamber wall.
11. A gas-turbine combustion chamber wall in accordance with claim 1 , wherein the combustion chamber segments overlap each other in their edge zones.
12. A gas-turbine combustion chamber wall in accordance with claim 1 , wherein the combustion chamber segments are arranged closely to a zone of maximum heat release of the gas turbine combustion chamber.
13. A gas-turbine combustion chamber wall for a lean-burning gas-turbine combustion chamber, comprising:
a combustion chamber casing;
several combustion chamber segments arranged in the combustion chamber casing and forming a combustion chamber wall, each of the combustion chamber segments being supplied with cooling air with film cooling via at least one of axial cooling holes and radial cooling holes, with the cooling holes being axially spaced from each other; and
dampening openings being provided in the combustion chamber wall for the introduction of air;
wherein the combustion chamber segments are of a double-wall design and at least one includes a damper casing arranged radially outward and forming a circumferential dampening volume, wherein the circumferential dampening volume of the damper casing is subdivided into individual chambers.
14. A gas-turbine combustion chamber wall in accordance with claim 13 , wherein each of the combustion chamber segments is annular and conical.
15. A gas-turbine combustion chamber wall in accordance with claim 14 , wherein the combustion chamber segments overlap each other in their edge zones.
16. A gas-turbine combustion chamber wall in accordance with claim 15 , wherein the combustion chamber segments are arranged closely to a zone of maximum heat release of the gas turbine combustion chamber.
17. A gas-turbine combustion chamber wall in accordance with claim 16 , wherein the combustion chamber segments are arranged centrally between burners and turbine inlet vanes.
18. A gas-turbine combustion chamber wall in accordance with claim 13 , wherein the circumferential dampening volume of the damper casing is at least partly filled with air-permeable material.
19. A gas-turbine combustion chamber wall in accordance with claim 13 , wherein the combustion chamber wall is made of metal.
20. A gas-turbine combustion chamber wall in accordance with claim 13 , wherein the combustion chamber wall is made of ceramics.