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A combustor nozzle includes a single-piece swirler. The single-piece swirler includes a center body extending axially along the single-piece swirler, a first fuel passage inside the center body, and a plurality of vanes extending radially from the center body. A method for fabricating a combustor no

A combustor nozzle includes a single-piece swirler. The single-piece swirler includes a center body extending axially along the single-piece swirler, a first fuel passage inside the center body, and a plurality of vanes extending radially from the center body. A method for fabricating a combustor nozzle includes casting a single-piece swirler having a center body and a plurality of vanes extending radially from the center body.

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1. A combustor nozzle comprising: a. a single-piece swirler, wherein the single-piece swirler comprises i. a center body extending axially along the single-piece swirler;ii. a first fuel passage inside the center body; andiii. a plurality of vanes extending radially from the center body;b. a shroud

1. A combustor nozzle comprising: a. a single-piece swirler, wherein the single-piece swirler comprises i. a center body extending axially along the single-piece swirler;ii. a first fuel passage inside the center body; andiii. a plurality of vanes extending radially from the center body;b. a shroud circumferentially surrounding at least a portion of the single-piece swirler; andc. a continuous passage through the shroud and the plurality of vanes into the center body. 2. The combustor nozzle as in claim 1, wherein the single-piece swirler further comprises a tube inside at least a portion of the center body, wherein the tube defines a second fuel passage between the tube and the center body. 3. The combustor nozzle as in claim 2, wherein the single-piece swirler further comprises at least one support extending radially between the tube and the center body. 4. The combustor nozzle as in claim 2, wherein the second fuel passage extends through the center body and the plurality of vanes. 5. The combustor nozzle as in claim 1, wherein the shroud extends axially upstream of the single-piece swirler and axially downstream of the single-piece swirler. 6. The combustor nozzle as in claim 1, wherein the shroud comprises a bell mouth opening at one end. 7. The combustor nozzle as in claim 1, further comprising an annular flange connected upstream of the single-piece swirler. 8. A combustor nozzle comprising: a. a single-piece swirler, wherein the single-piece swirler comprises i. a center body configured to receive a flow of fuel;ii. a plurality of vanes extending radially from the center body;iii. a shroud circumferentially surrounding at least a portion of the plurality of vanes; andiv. a continuous passage through the shroud, the plurality of vanes, and the center body. 9. The combustor nozzle as in claim 8, wherein the single-piece swirler further comprises a tube inside at least a portion of the center body, wherein the tube defines a fuel passage between the tube and the center body. 10. The combustor nozzle as in claim 9, wherein the single-piece swirler further comprises at least one support extending radially between the tube and the center body. 11. The combustor nozzle as in claim 8, wherein the single-piece swirler further comprises a fuel passage through the center body and the plurality of vanes. 12. The combustor nozzle as in claim 8, further comprising an annular sleeve circumferentially surrounding at least a portion of the single-piece swirler and connected upstream of the single-piece swirler. 13. The combustor nozzle as in claim 8, further comprising an annular flange connected upstream of the single-piece swirler. 14. The combustor nozzle as in claim 8, further comprising a burner tube connected downstream of the single-piece swirler. 15. A method for fabricating a combustor nozzle comprising: a. casting a single-piece swirler, wherein the single-piece swirler comprises a center body, a plurality of vanes extending radially from the center body, a shroud circumferentially surrounding at least a portion of the plurality of vanes, and a continuous passage through the shroud, the plurality of vanes, and the center body. 16. The method as in claim 15, further comprising connecting an annular flange upstream of the single-piece swirler.