Combustion device for a gas turbine

1. A combustion device for a gas turbine comprising:

a portion having an inner wall and an outer wall and an interposed noise absorption plate having a plurality of holes through the noise absorption plate, a plurality of inner chambers located between the inner wall and the noise absorption plate, the inner wall delimiting an inside of the combustion device;

a plurality of first passages connecting the plurality of inner chambers to the inside of the combustion device;

a plurality of second passages extending in the inner wall, the plurality of second passages configured and arranged to cool the inner wall, wherein each one of the plurality of second passages extend through the outer wall to the inner wall and open into the inside of the combustion device;

an inner layer between the inner wall and the plate defining the plurality of inner chambers, each one the plurality of inner chambers connected to at least one of the plurality of first passages; and

an outer layer between the outer wall and the plate defining a plurality of outer chambers, each one of the plurality of outer chambers connected to a respective one of the plurality of inner chambers via the plurality of holes, wherein the plurality of inner chambers, the plurality of outer chambers, and the plurality of first passages define Helmholtz dampers.

2. The combustion device as claimed in claim 1 , wherein said inner wall, said inner layer, said noise absorption plate, said outer layer, and said outer wall lay one over the other to define a layered structure.

3. The combustion device as claimed in claim 2 , wherein said inner wall, said inner layer, said noise absorption plate, said outer layer, and said outer wall are brazed together.

4. The combustion device as claimed in claim 2 , wherein the inner layer is a separate piece from the inner wall.

5. The combustion device as claimed in claim 2 , wherein the outer layer is integral with or a separate piece from the outer wall.

6. The combustion device as claimed in claim 2 , wherein the outer wall delimits an outside of the combustion device and has a plurality of outer holes connecting said outside to the plurality of outer chambers.

7. The combustion device as claimed in claim 2 , wherein: the outer wall delimits an outside of the combustion device; and each one of the plurality of second passages open to said outside and pass through the layered structure.

8. The combustion device as claimed in claim 7 , further comprising:

a plurality of aligned apertures formed at least in said outer wall, said outer layer, said noise absorption plate, and said inner layer; wherein the plurality of aligned apertures at least partly define each one of the plurality of second passages.

9. The combustion device as claimed in claim 8 , wherein each one of the plurality of second passages comprise a portion extending parallel to the inner wall.

10. The combustion device as claimed in claim 9 , wherein said portion of each one of the plurality of second passages extending parallel to the inner wall is adjacent to and is configured and arranged to cool the inner wall.

11. The combustion device as claimed in claim 1 , further comprising:

a plurality of pipes, each one of the plurality of pipes having an outlet facing the inner wall; and wherein at least some of the plurality of second passages are at least partly defined by one of the plurality of pipes.

12. The combustion device as claimed in claim 1 , wherein:

each one of the plurality of first passages comprise an inlet in said inner wall; and

each one of the plurality of second passages comprise an outlet in said inner wall, the inlet of each one of the plurality of first passages being at least partially encircled by respective outlets of the plurality of second passages.

13. The combustion device as claimed in claim 1 , wherein each one of the plurality of second passages includes a portion extending in and parallel to the inner wall.

14. A combustion device for a gas turbine comprising:

a portion having an inner wall and an outer wall and an interposed noise absorption plate having a plurality of holes through the noise absorption plate, a plurality of inner chambers located between the inner wall and the noise absorption plate, the inner wall delimiting an inside of the combustion device;

a plurality of first passages connecting the plurality of inner chambers to the inside of the combustion device;

a plurality of second passages extending in the inner wall, the plurality of second passages configured and arranged to cool the inner wall, wherein each one of the plurality of second passages open into the inside of the combustion device;

an inner layer between the inner wall and the plate defining the plurality of inner chambers, each one the plurality of inner chambers connected to at least one of the plurality of first passages;

an outer layer between the outer wall and the plate defining a plurality of outer chambers, each one of the plurality of outer chambers connected to a respective one of the plurality of inner chambers via the plurality of holes; and

a plurality of aligned apertures formed at least in said outer wall, said outer layer, said noise absorption plate, and said inner layer, wherein the plurality of aligned apertures at least partly define each one of the plurality of second passages,

wherein:

the outer wall delimits an outside of the combustion device; said inner wall, said inner layer, said noise absorption plate, said outer layer, and said outer wall lay one over the other to define a layered structure;

each one of the plurality of second passages open to said outside and pass through the layered structure, and the plurality of inner chambers, the plurality of outer chambers, and the plurality of first passages define Helmholtz dampers.

15. The combustion device as claimed in claim 14 , wherein:

each one of the plurality of first passages comprise an inlet in said inner wall; and

each one of the plurality of second passages comprise an outlet in said inner wall, the inlet of each one of the plurality of first passages being at least partially encircled by respective outlets of the plurality of second passages.

16. A combustion device for a gas turbine comprising:

a portion having an inner wall and an outer wall and an interposed noise absorption plate having a plurality of holes through the noise absorption plate, a plurality of inner chambers located between the inner wall and the noise absorption plate, the inner wall delimiting an inside of the combustion device;

a plurality of first passages connecting the plurality of inner chambers to the inside of the combustion device;

a plurality of second passages extending in the inner wall, the plurality of second passages configured and arranged to cool the inner wall, wherein each one of the plurality of second passages open into the inside of the combustion device;

an inner layer between the inner wall and the plate defining the plurality of inner chambers, each one the plurality of inner chambers connected to at least one of the plurality of first passages;

an outer layer between the outer wall and the plate defining a plurality of outer chambers, each one of the plurality of outer chambers connected to a respective one of the plurality of inner chambers via the plurality of holes;

a plurality of pipes, each one of the plurality of pipes having an outlet facing the inner wall, at least some of the plurality of second passages being at least partly defined by one of the plurality of pipes;

wherein said inner wall, said inner layer, said noise absorption plate, said outer layer, and said outer wall lay one over the other to define a layered structure; and

wherein the outer wall delimits an outside of the combustion device and each one of the plurality of second passages open to said outside and pass through the layered structure, and the plurality of inner chambers, the plurality of outer chambers, and the plurality of first passages define Helmholtz dampers.