RESONATOR SYSTEM WITH ENHANCED COMBUSTOR LINER COOLING

• US 20120198854A1
• Filed: 02/09/2011
• Published: 08/09/2012
• Est. Priority Date: 02/09/2011
• Status: Active Grant

• Current Assignee: Siemens Energy Incorporated (Siemens AG)
• Original Assignee: Siemens Energy Incorporated (Siemens AG)
• Inventors: Schilp, Reinhard, Sutcu, Muzaffer
• Granted Patent: US 8,720,204 B2
• Time in Patent Office: Days
• US Class Current: 60/755
• CPC Class Codes: F23M 20/005 Noise absorbing means
• CPC Class Codes: F23R 2900/00014 Reducing thermo-acoustic vibrations by passive means, e.g. by Helmholtz resonators silence apparatus using resonance F01N1/023
• CPC Class Codes: F23R 2900/03042 Film cooled combustion chamber walls or domes
• CPC Class Codes: F23R 2900/03044 Impingement cooled combustion chamber walls or subassemblies
• CPC Class Codes: F23R 3/002 Wall structures F23R3/02 and F23R3/007 take precedence
• CPC Class Codes: F23R 3/06 Arrangement of apertures along the flame tube

Abstract

A combustor liner has a plurality of resonators formed thereon. Each resonator has a radially outer wall and at least one side wall. The outer wall can be free of holes. Each resonator has an inner cavity defined between the outer wall, the at least one side wall and the outer peripheral surface of the liner. The at least one side wall of each resonator surrounds a subset of a plurality of holes that extend substantially radially through the liner. A plurality of cooling passages extends generally longitudinally within the liner. Each cooling passage has an inlet in fluid communication with the exterior of the liner and an outlet in fluid communication with the inner cavity of a respective one of the resonators. A coolant, such as compressor air, can enter and flow along the cooling passages to thereby cool the liner and purge the inner cavity of the resonator.

Claims

1. A resonator system for a turbine engine comprising:

a hollow combustor component having an outer peripheral surface and an inner peripheral surface, a first plurality of holes extending substantially radially through the combustor component from the inner peripheral surface to the outer peripheral surface, the first plurality of holes being distributed circumferentially about the combustor component;

a first plurality of resonators formed with the combustor component, each resonator having a radially outer wall and at least one side wall, each resonator having an inner cavity defined between the radially outer wall, the at least one side wall and the combustor component, the at least one side wall of each resonator surrounding a subset of the first plurality of holes, the first plurality of resonators being substantially circumferentially aligned about the combustor component to form a first row of resonators; and

a first plurality of cooling passages extending generally longitudinally within the combustor component, each of the first plurality of cooling passages having an inlet in fluid communication with the exterior of the combustor component and an outlet in fluid communication with the inner cavity of a respective one of the resonators.

2. The system of claim 1, wherein the combustor component is a combustor liner.

3. The system of claim 1, wherein the radially outer wall of at least one of the resonators is free of holes.

4. The system of claim 1, wherein the combustor component is formed by an inner panel and an outer panel, wherein the plurality of first cooling passages is defined by the inner and outer panels.

5. The system of claim 4, wherein the plurality of first cooling passages is defined by a plurality of channels formed in at least one of the inner panel and the outer panel.

6. The system of claim 4, further including an intermediate panel disposed between the inner and outer panels, wherein at least one of the plurality of first cooling passages is defined in part by a plurality of channels formed in the intermediate panel.

7. The system of claim 4, wherein the inner cavity is defined in part by a recess formed in the inner panel, wherein the recess is at least partly defined by a wall, and wherein the cooling passages have an outlet formed in the wall.

8. The system of claim 4, wherein the inner cavity is defined in part by a recess formed in the inner panel, wherein the recess includes a wall, wherein the cooling passages extend toward but stop short of the recess, wherein each of the cooling passages has an outlet, wherein the outlets are separated from the recess, and wherein the outlets of the cooling passages and the recess are enclosed within the at least one side wall of a respective resonator.

9. The system of claim 4 wherein the inner cavity is defined in part by a plurality of recesses formed in the inner panel, and wherein the at least one side wall of each resonator surrounds a subset of the plurality of recesses.

10. The system of claim 1, wherein the inlets of the first plurality of cooling passages are located upstream of the resonator relative to the direction of a fluid flow within the combustor component.

11. The system of claim 1, wherein the inlets of the first plurality of cooling passages are located downstream of the resonator relative to the direction of a fluid flow within the combustor component.

12. The system of claim 1, wherein at least a portion of at least one of the first plurality of cooling passages is non-straight.

13. The resonator system of claim 1, wherein, for at least one of the first plurality of resonators, the radially outer wall and the at least one side wall are formed as a resonator box, the at least one side wall of the resonator box being attached to the combustor component so that the resonator box protrudes outwardly from the outer peripheral surface of the combustor component.

14. The resonator system of claim 1, further including:

a second plurality of holes extending substantially radially through the combustor component, the first plurality of holes being distributed circumferentially about the combustor component;

a second plurality of resonators formed with the combustor component, each resonator having a radially outer wall and at least one side wall, each resonator having an inner cavity defined between the radially outer wall, the at least one side wall and the outer peripheral surface of the combustor component, the at least one side wall of each resonator surrounding a subset of the second plurality of holes, the second plurality of resonators being substantially circumferentially aligned about the combustor component to form a second row of resonators; and

a second plurality of cooling passages extending generally longitudinally within the combustor component, each of the second plurality of cooling passages having an inlet in fluid communication with the exterior of the combustor component and an outlet in fluid communication with the inner cavity of a respective one of the second plurality of resonators.

15. The resonator system of claim 14, wherein the inlets of the first plurality of cooling passages are located upstream of the first plurality of resonators relative to the direction of a fluid flow within the combustor component, and

wherein the inlets of the second plurality of cooling passages are located downstream of the first plurality of resonator relative to the direction of a fluid flow within the combustor component.

16. The resonator system of claim 14 wherein the at least one of the first plurality of cooling passages passes between two neighboring resonators of the second plurality of resonators.

17. A resonator system for a turbine engine comprising:

a hollow combustor liner having an outer peripheral surface and an inner peripheral surface, a plurality of holes extending substantially radially through the combustor liner, the plurality of holes being distributed circumferentially about the combustor liner, the combustor liner being formed by a plurality of panels;

a plurality of resonators formed with the combustor liner, each resonator having a radially outer wall and at least one side wall, each resonator having an inner cavity defined between the radially outer wall, the at least one side wall and the combustor liner, the at least one side wall of each resonator surrounding a subset of the first plurality of holes, the plurality of resonators being substantially circumferentially aligned about the combustor liner to form a first row of resonators; and

a plurality of cooling passages extending generally longitudinally within the combustor liner, each cooling passage having an inlet in fluid communication with the exterior of the combustor component and an outlet in fluid communication with the inner cavity of a respective one of the resonators, the plurality of cooling passages being defined in part by channels formed in at least one of the plurality of panels.

18. The system of claim 17, wherein the radially outer wall of at least one of the plurality of resonators is free of holes.

19. The system of claim 17, wherein the inlets of the plurality of cooling passages are located upstream of the resonator relative to the direction of a fluid flow within the combustor liner.

20. The system of claim 17, wherein the inlets of the plurality of cooling passages are located downstream of the resonator relative to the direction of a fluid flow within the combustor liner.