Dual fuel radial flow nozzles

Patent metadata

Field	Value
Publication number	US-10634355-B2
Application number	US-201615382044-A
Country	US
Kind code	B2
Filing date	Dec 16, 2016
Priority date	Dec 16, 2016
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

A nozzle includes a nozzle body defining a longitudinal axis. The nozzle body includes an inner air passage fed by a radial swirler and having a converging conical cross-section. A first fuel circuit is radially outboard from the air passage with respect to the longitudinal axis. A second fuel circuit is radially outboard from the first fuel circuit with respect to the longitudinal axis, wherein each of the first fuel circuit and the second fuel circuit extends from a respective fuel circuit inlet to a respective annular fuel circuit outlet. An outer air passage is defined between a fuel circuit outer wall and an outer air passage wall, wherein the outer air passage is a converging non-swirling outer air passage.

First claim

What is claimed is:

1. A nozzle comprising:
a nozzle body defining a longitudinal axis and including:
an inner air passage fed by a radial swirler and having a converging conical cross-section;
wherein the radial swirler includes radial swirl vanes circumferentially spaced apart from one another about an annular inner air inlet;
a first fuel circuit radially outboard from the inner air passage with respect to the longitudinal axis;
a second fuel circuit radially outboard from the first fuel circuit with respect to the longitudinal axis, wherein each of the first fuel circuit and the second fuel circuit extends from a respective fuel circuit inlet to a respective annular fuel circuit outlet;
wherein the fuel circuit inlet of the first fuel circuit includes a first plurality of circumferentially spaced apart openings for fluid communication with a fuel manifold, and wherein the fuel circuit inlet of the second fuel circuit includes a second plurality of circumferentially spaced apart openings for fluid communication with the fuel manifold;
wherein the nozzle body includes a plurality of tubes, a first set of the plurality of tubes connecting the first plurality of circumferentially spaced apart openings, a second set of the plurality of tubes connecting the second plurality of circumferentially spaced apart openings, wherein the first set of the plurality of tubes and the second set of the plurality of tubes pass axially through the radial swirl vanes; and
an outer air passage defined between a fuel circuit outer wall of the second fuel circuit and an outer air passage wall, wherein the outer air passage is a converging non-swirling outer air passage.

2. The nozzle as recited in claim 1 , wherein at least one of the first fuel circuit or the second fuel circuit includes a plurality of helical passages, wherein each helical passage opens tangentially with respect to the respective annular fuel circuit outlet.

3. The nozzle as recited in claim 2 , wherein the plurality of helical passages define a flow exit angle relative to the longitudinal axis of at least 85°.

4. The nozzle as recited in claim 1 , wherein the second set of the plurality of tubes pass axially through the first fuel circuit.

5. The nozzle as recited in claim 1 , wherein the inner air passage, the outer air passage, the first fuel circuit, and the second fuel circuit are configured for diffusion flame injection without pre-mixing within the nozzle body.

6. The nozzle as recited in claim 1 , wherein the inner air passage is free from obstructions along the longitudinal axis downstream of the radial swirler.

7. The nozzle as recited in claim 1 , wherein the second fuel circuit is configured for injection of liquid fuel.

8. The nozzle as recited in claim 1 , wherein the first fuel circuit is configured for injection of gaseous fuel.

9. The nozzle as recited in claim 1 , wherein an ignitor is located in an upstream wall of the nozzle body, oriented coaxially with the longitudinal axis.

10. A nozzle comprising:
a nozzle body defining a longitudinal axis and including:
an inner air passage fed by a radial swirler and having a converging conical cross-section;
a first fuel circuit radially outboard from the inner air passage with respect to the longitudinal axis;
a second fuel circuit radially outboard from the first fuel circuit with respect to the longitudinal axis, wherein each of the first fuel circuit and the second fuel circuit extends from a respective fuel circuit inlet to a respective annular fuel circuit outlet;
wherein the second fuel circuit is defined by a fuel circuit outer wall of the second fuel circuit and an intermediate fuel circuit wall, and wherein the first fuel circuit is defined by a fuel circuit inner wall of the first fuel circuit and the intermediate fuel circuit wall, wherein the intermediate fuel circuit wall is radially outboard from the fuel circuit inner wall of the first fuel circuit with respect to the longitudinal axis, and wherein the outer fuel circuit wall of the second fuel circuit is radially outboard of the intermediate fuel circuit wall with respect to the longitudinal axis.

11. The nozzle as recited in claim 10 , wherein the respective annular fuel circuit outlets of the first fuel circuit are separated from the respective annular fuel circuit outlets of the second fuel circuit only by the intermediate fuel circuit wall.

12. The nozzle as recited in claim 10 , wherein at least a portion of each of the fuel circuit inner wall of the first fuel circuit, the fuel circuit outer wall of the second fuel circuit, and the intermediate fuel circuit wall has a conical shape that converges toward the longitudinal axis.

13. A nozzle comprising:
a nozzle body defining a longitudinal axis and including:
an inner air passage fed by a radial swirler and having a converging conical cross-section, wherein the radial swirler includes radial swirl vanes circumferentially spaced apart from one another about an annular inner air inlet;
a first fuel circuit radially outboard from the inner air passage with respect to the longitudinal axis;
a second fuel circuit radially outboard from the first fuel circuit with respect to the longitudinal axis, wherein each of the first fuel circuit and the second fuel circuit extends from a respective fuel circuit inlet to a respective annular fuel circuit outlet, wherein the fuel circuit inlet of the first fuel circuit includes a first plurality of circumferentially spaced apart openings for fluid communication with a fuel manifold, and wherein the fuel circuit inlet of the second fuel circuit includes a second plurality of circumferentially spaced apart openings for fluid communication with the fuel manifold;
wherein the nozzle body includes a plurality of tubes, a first set of the plurality of tubes connecting the first plurality of circumferentially spaced apart openings, a second set of the plurality of tubes connecting the second plurality of circumferentially spaced apart openings, wherein the first set of the plurality of tubes pass axially through a first group of the radial swirl vanes and the second set of the plurality of tubes pass axially through the first group of the radial swirl vanes, and wherein the second set of the plurality of tubes pass axially through the first fuel circuit; and
an outer air passage defined between a fuel circuit outer wall of the second fuel circuit and an outer air passage wall, wherein the outer air passage is a converging non-swirling outer air passage.

14. The nozzle as recited in claim 13 , wherein each tube in the second set of the plurality of tubes passes through a respective one of the tubes in the first set of the plurality of tubes.

Assignees

• Delavan Inc

Inventors

• Prociw Lev Alexander
• Ryon Jason A

Classifications

• F23R3/10

  for primary air (F23R3/06, F23R3/045 take precedence) · CPC title

• F23D11/107

  at least one of both being subjected to a swirling motion · CPC title

• F23D17/002

  gaseous or liquid fuel · CPC title

• F23R3/346

  for staged combustion · CPC title

• F23R3/286 Primary

  having fuel-air premixing devices (F23R3/30 takes precedence) · CPC title