BURNER COMPONENT OF A BURNER, AND BURNER OF A GAS TURBINE HAVING A BURNER COMPONENT OF THIS TYPE

Abstract

A burner component of a burner. The burner has a flow channel, in which combustion air flows in a flow direction from upstream to downstream. The burner component includes a wall portion, which adjoins the flow channel; a plurality of injection nozzles, which are arranged in the wall portion; and a plurality of vortex generators, which are arranged on the wall portion. The vortex generators have a concavely curved sloped surface rising in the flow direction to improve the distribution of the fuel in the combustion air.

Claims

1. A burner component of a burner, with, in its intended use, at least one flow duct in which combustion air flows from upstream to downstream in a direction of flow, comprising: a wall section adjoining the flow duct, and a plurality of spray nozzles arranged in the wall section by which fuel is introduced into the flow duct, and a plurality of vortex generators which in each case are arranged on the wall section, and project into the flow duct, and have a vortex generator length in the direction of flow, and have upstream a leading edge running on the wall section, and have downstream a trailing edge, running in a respective vertical direction, with a base point at the wall section and an end point, and have two opposite side faces running upstream from the trailing edge, and have an inclined face running from the leading edge to the end point, wherein the inclined face is curved concavely and the side faces are curved convexly in a section transversely to the vertical direction.

2. The burner component as claimed in claim 1, wherein the inclined face has a constant radius of curvature.

3. The burner component as claimed in claim 1, wherein a face depth as the greatest spacing from the inclined face to an inclined plane corresponds to at least 0.05 times, a vortex generator height; and/or wherein a face depth as the greatest spacing from the inclined face to an inclined plane corresponds to no more than 0.4 times, the vortex generator height.

4. The burner component as claimed in claim 1, wherein, on one side or on each side, a spray nozzle is arranged in a side face and/or in the wall section at a distance from the base point of no more than 0.3 times a vortex generator height.

5. The burner component as claimed in claim 1, wherein in each case a spray nozzle is arranged centrally with respect to the respective vortex generator.

6. The burner component as claimed in claim 5, wherein the spray nozzle is arranged at the trailing edge.

7. The burner component as claimed in claim 6, wherein the spray nozzle is arranged at a distance from the base point of no more than 0.5 times a vortex generator height; and/or wherein the spray nozzle is arranged at a distance from the base point of at least 0.1 times the vortex generator height.

8. The burner component as claimed in claim 1, wherein in each case at least, one spray nozzle is arranged centrally between two vortex generators.

9. The burner component as claimed in claim 8, wherein the spray nozzle is arranged at a distance in the direction of flow from the base point of no more than 0.5 times a vortex generator height.

10. The burner component as claimed in claim 8, wherein the inclined faces of adjacent vortex generators have a common edge section.

11. A burner lance, comprising: a burner component with a rotationally symmetrical wall as a wall section and with a plurality of vortex generators, as claimed in claim 1, wherein the plurality of vortex generators are arranged so that they are distributed over a periphery.

12. A burner for use in a combustion chamber, comprising: a burner component as claimed in claim 1.

13. The burner as claimed in claim 12, further comprising: at least one mixing tube which is arranged upstream of a combustion chamber and in which the burner component is arranged centrally.

14. The burner as claimed in claim 13, further comprising: a plurality of mixing tubes running in parallel which are arranged upstream of a common combustion chamber and in which in each case a burner component is arranged centrally.

15. The burner component as claimed in claim 1, wherein the burner component is adapted for use in a combustion chamber of a gas turbine.

16. The burner component as claimed in claim 3, wherein a face depth as the greatest spacing from the inclined face to an inclined plane corresponds to at least 0.1 times the vortex generator height.

17. The burner component as claimed in claim 3, wherein a face depth as the greatest spacing from the inclined face to an inclined plane corresponds to no more than 0.3 times the vortex generator height.

18. The burner component as claimed in claim 8, wherein in each case precisely one spray nozzle is arranged centrally between two vortex generators.

19. The burner as claimed in claim 12, wherein the combustion chamber comprises a gas turbine combustion chamber.

20. The burner as claimed in claim 12, wherein the burner component comprises a burner lance.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0053] An exemplary embodiment for a burner component according to the invention is illustrated in the following drawings, in which:

[0054] FIG. 1 shows a perspective view of a burner lance as a burner component;

[0055] FIG. 2 shows a detailed view of the arrangement of vortex generators and spray nozzles;

[0056] FIG. 3 shows a side view of FIG. 2;

[0057] FIG. 4 shows a view of FIG. 1 counter to the direction of flow;

[0058] FIG. 5 shows a section through the burner lance in the region of the vortex generators.

DETAILED DESCRIPTION OF INVENTION

[0059] An exemplary embodiment for a burner component 01 according to the invention in the form of a burner lance is shown in FIG. 1 in a perspective view. First of all, the typical rotationally symmetrical, elongated shape of the burner lance 01 can be seen. The slightly conical wall of the burner lance forms the wall section 03 of the burner component 01 as a delimiting surface for the flow duct which is present in the burner when used as intended. Said flow duct accordingly defines the direction of flow 05 from an upstream side to a downstream side.

[0060] Also visible is the arrangement of a plurality of vortex generators 11, arranged so that they are distributed over the periphery, which each have an approximately triangular shape, viewed from different directions. The vortex generator 11 thus has approximately the form of a tetrahedron. Also visible is the arrangement of a plurality of spray nozzles 21, 22 which are arranged downstream from the vortex generators 11.

[0061] FIGS. 2 to 5 now show in detail the design of the vortex generators 11 and the associated spray nozzles 21, 22.

[0062] The respective vortex generator 11 is delimited upstream by a leading edge 14. The leading edge 14 here runs in a transverse direction which is oriented perpendicularly to the direction of flow tangentially to the wall section 03. By virtue of the arrangement of the vortex generators 11 on the rotationally symmetrical wall section 03, the leading edge 14 is curved such that the two opposite edge ends 15 of the leading edge 14 are arranged furthest upstream. The vortex generator is delimited on the opposite side by the trailing edge 16 which extends approximately in a respective vertical direction from a base point 18 on the wall section 03 as far as an end point 17. The vertical direction is here oriented approximately perpendicularly to the direction of flow and perpendicularly to the wall section 03 at the base point 18.

[0063] The spacing from the base point 18 to the end point 17, measured in the vertical direction, here defines the vortex generator height.

[0064] The spacing from the trailing edge 16 to the edge ends 15, measured in the direction of flow 05, here defines a vortex generator length.

[0065] The respective vortex generator 11 is delimited laterally by two opposite side faces 19 which each extend from the trailing edge in the direction of the respective edge end 15 of the leading edge 14. As can be seen, the side faces 19 have a convexly curved shape.

[0066] The surface, essential for swirling the fuel in the combustion air, of the vortex generator forms the inclined face 12 which extends from the leading edge 14 to the end point 17. The inclined face 12 is delimited correspondingly in some places by cut edges with the two side faces 19. In this exemplary embodiment, it is provided that the vortex generators 11 are arranged so that they are adjacent to one another in such a way that in some places a common edge section of the adjacent inclined faces 12 results, starting from the respective edge end 15 as far as essentially the beginning of the side faces 19.

[0067] Although not immediately evident from the individual illustrations, it is clear from considering them collectively that the inclined face 12 has a convexly curved shape. This is the critical feature for obtaining the advantageous swirling and hence a further option for reducing harmful substances during the combustion. The inclined face 12 is here situated below a theoretical inclined plane 13. The inclined plane 13 is here defined by the end point 17 and the two edge ends 15 such that the inclined face 12 is arranged completely below the inclined plane 13. In this advantageous embodiment, it is provided that the greatest spacing between the inclined face 12 and the theoretical inclined plane 13 corresponds as a face depth to 0.2 times the vortex generator height.

[0068] Also visible from the views is the advantageous arrangement of spray nozzles 21, 22. In this exemplary embodiment, it is provided that a spray nozzle 21 is in each case situated in the wall section 03, centrally behind a vortex generator 11. In this exemplary embodiment, the distance from the edge of the respective spray nozzle 21 to the base point 18 of the trailing edge 16 is approximately 0.25 times the vortex generator height.

[0069] It is furthermore advantageously provided that a further spray nozzle 22 is arranged on the wall section 03 in each case between two vortex generators 11. The distance from the edge of the spray nozzle 22 to the base point 18 of the vortex generators 11 is here approximately 0.15 times the vortex generator height.