Endcover assembly for a combustor

1. An endcover assembly for a combustor, the endcover assembly comprising:

an endcover;

a fuel nozzle rigidly connected to the endcover, the fuel nozzle including a plurality of tubes that extends axially through a first plate, a fuel plenum and a second plate of the fuel nozzle, where each tube includes an inlet defined upstream of the first plate and an outlet disposed downstream from the second plate;

an inlet flow conditioner having a forward end connected to the endcover and an aft end axially spaced from the forward end, the inlet flow conditioner circumferentially surrounding at least a portion of the fuel nozzle, the inlet flow conditioner including a first sleeve circumferentially surrounded by a second sleeve, wherein the second sleeve is radially spaced from the first sleeve and defines an annular flow passage therebetween, wherein the first sleeve defines a first diameter; and

a support plate joined to the aft end of the inlet flow conditioner, wherein each tube of the fuel nozzle extends through a corresponding tube hole defined by the support plate, and wherein the fuel nozzle is connected to the support plate, wherein the support plate defines a second diameter that is greater than the first diameter.

2. The endcover assembly as in claim 1 , wherein the support plate defines a plurality of mounting holes and the inlet flow conditioner defines a plurality of fastener holes, wherein each mounting hole of the plurality of mounting holes is aligned with a respective fastener hole of the plurality of fastener holes.

3. The endcover assembly as in claim 1 , further comprising an end plate disposed downstream from the support plate, wherein a downstream end of each tube of the plurality of tubes extends through the end plate.

4. The endcover assembly as in claim 1 , wherein the first sleeve and the endcover define a flow distribution plenum upstream from the inlets of the tubes of the plurality of tubes.

5. The endcover assembly as in claim 1 , wherein the first sleeve defines a plurality of apertures, wherein the plurality of apertures provide for fluid communication between the annular flow passage and a flow distribution plenum at least partially defined by the endcover and the first sleeve.

6. The endcover assembly as in claim 1 , wherein the inlet flow conditioner further comprises a plurality of support vanes that extend radially between the first sleeve and the second sleeve.

7. The endcover assembly as in claim 6 , wherein the plurality of support vanes is disposed proximate to an aft end of the inlet flow conditioner.

8. A combustor, comprising:

an outer casing;

an endcover assembly comprising: an endcover connected to the outer casing, wherein the endcover and the outer casing at least partially define a high pressure plenum;

a fuel nozzle rigidly connected to the endcover, the fuel nozzle including a plurality of tubes that extends axially through a first plate, a fuel plenum and a second plate of the fuel nozzle, where each tube includes an inlet defined upstream of the first plate and an outlet disposed downstream from the second plate;

an inlet flow conditioner having a forward end connected to the endcover and an aft end axially spaced from the forward end, the inlet flow conditioner circumferentially surrounding at least a portion of the fuel nozzle; and

a support plate connected directly to the second plate, extending radially past the second plate, and joined to the aft end of the inlet flow conditioner, wherein each tube of the fuel nozzle extends through a corresponding tube hole defined by the support plate, and wherein the fuel nozzle is connected to the support plate.

9. The combustor as in claim 8 , wherein the support plate defines a plurality of mourning holes and the inlet flow conditioner defines a plurality of fastener holes, wherein each mounting hole of the plurality of mounting holes is aligned with a respective fastener hole of the plurality of fastener holes.

10. The combustor as in claim 8 , further comprising an end plate disposed downstream from the support plate, wherein a downstream end of each tube of the plurality of tubes extends through the end plate.

11. The combustor as in claim 8 , wherein the inlet flow conditioner includes a first sleeve circumferentially surrounded by a second sleeve, wherein the second sleeve is radially spaced from the first sleeve and defines an annular flow passage therebetween, wherein the annular flow passage is in fluid communication with the high pressure plenum.

12. The combustor as in claim 11 , wherein the first sleeve and the endcover define a flow distribution plenum upstream from the inlets of the tubes of the plurality of tubes.

13. The combustor as in claim 11 , wherein the first sleeve defines a plurality of apertures, wherein the plurality of apertures provide for fluid communication between the high pressure plenum, the annular flow passage and a flow distribution plenum at least partially defined by the endcover and the first sleeve.

14. The combustor as in claim 11 , wherein the inlet flow conditioner further comprises a plurality of support vanes that extend radially between the first sleeve and the second sleeve within the annular flow passage.

15. The combustor as in claim 14 , wherein the plurality of support vanes are disposed proximate to an aft end of the inlet flow conditioner.

16. An endcover assembly for a combustor, the endcover assembly comprising:

an endcover;

a fuel nozzle rigidly connected to the endcover, the fuel nozzle including a plurality of tubes that extends axially through a first plate, a fuel plenum and a second plate of the fuel nozzle, where each tube includes an inlet defined upstream of the first plate and an outlet disposed downstream from the second plate;

an inlet flow conditioner having a forward end connected to the endcover and an aft end axially spaced from the forward end, the aft end defining an aft surface, the aft surface extending radially with respect to a longitudinal axis of the fuel nozzle and including a plurality of fastener holes, the inlet flow conditioner circumferentially surrounding at least a portion of the fuel nozzle; and a support plate joined directly to the aft surface of the aft end of the inlet flow conditioner, wherein each tube of the fuel nozzle extends through a corresponding tube hole defined by the support plate, and wherein the fuel nozzle is connected to the support plate.

17. The endcover assembly as in claim 16 , wherein the support plate defines a plurality of mounting holes and wherein each mounting hole of the plurality of mounting holes is aligned with a respective fastener hole of the plurality of fastener holes.

18. The endcover assembly as in claim 16 , further comprising an end plate disposed downstream from the support plate, wherein a downstream end of each tube of the plurality of tubes extends through the end plate.

19. The endcover assembly as in claim 16 , wherein the inlet flow conditioner includes a first sleeve circumferentially surrounded by a second sleeve, wherein the second sleeve is radially spaced from the first sleeve and defines an annular flow passage therebetween, wherein the annular flow passage is in fluid communication with the high pressure plenum.

20. The endcover assembly as in claim 19 , wherein the first sleeve defines a plurality of apertures, wherein the plurality of apertures provide for fluid communication between the high pressure plenum, the annular flow passage and a flow distribution plenum at least partially defined by the endcover and the first sleeve.