Diffuser part for a gas turbine
A diffuser component for a gas turbine is provided, where a fluid flow in the direction of a combustion chamber of the gas turbine can be slowed down by the diffuser component, and a flow cross-section of the diffuser component, which is defined by a diffuser wall is widened to do so. The diffuser wall is at least locally braced, in that at least one stiffening element with a lattice-type structure is provided on the diffuser wall.
1. A diffuser component for a gas turbine, comprising:
a diffuser wall defining a flow cross-section, the flow cross-section increasing in area in a flow direction toward a combustion chamber of the gas turbine to slow a fluid flow through the flow cross-section toward the combustion chamber;
at least one stiffening element including a lattice structure connected to the diffuser wall, the at least one stiffening element bracing a section of the diffuser wall;
wherein the at least one stiffening element is positioned on an outer side of the diffuser wall that faces away from the fluid flow.
2. The diffuser component in accordance with claim 1 , wherein the lattice structure includes individual cells formed by struts running at angles to one another.
3. The diffuser component in accordance with claim 2 , wherein the individual cells have at least one chosen from geometrically differing shape and differing size.
4. The diffuser component in accordance with claim 1 , wherein the lattice structure includes individual cells having cross-sections shaped as at least one chosen from rectangular, triangular, trapezoidal, circular, elliptical, diamond and honeycomb.
5. The diffuser component in accordance with claim 1 , wherein the at least one stiffening element protrudes at a height from the diffuser wall, and the height varies along the diffuser wall.
6. The diffuser component in accordance with claim 1 , wherein the at least one stiffening element completely encloses a circumference of the diffuser wall.
7. The diffuser component in accordance with claim 6 , wherein the at least one stiffening element extends over more than 60% of a length of the diffuser wall.
8. The diffuser component in accordance with claim 1 , wherein the at least one stiffening element extends over only part of the diffuser wall.
9. The diffuser component in accordance with claim 1 , wherein the at least one stiffening element includes two stiffening elements spatially separated from one another, with each including a lattice structure on the diffuser wall.
10. The diffuser component in accordance with claim 9 , wherein the two stiffening elements are arranged along an extension direction of the diffuser wall pointing from an inlet of the diffuser to an outlet of the diffuser, and at least one chosen from one behind the other and transversely to the extension direction.
11. The diffuser component in accordance with claim 9 , wherein the two stiffening elements have at least one chosen from A), B) and C) where:
A) is differing heights of protrusion from the diffuser wall;
B) is at least one chosen from different lengths and different widths;
C) is lattice structures with cells differing in at least one chosen from geometry and size.
12. The diffuser component in accordance with claim 1 , and further comprising at least one additional flat stiffening element arranged on the at least one stiffening element.
13. The diffuser component in accordance with claim 12 , wherein the at least one additional stiffening element is at least one chosen from provided with a thin metal sheet and welded or brazed to the stiffening element.
14. A gas turbine including the diffuser component in accordance with claim 1 , and during operation of the gas turbine, the fluid flow is guided through the diffuser component in the direction of the combustion chamber.