Gas turbine engine with fluid circuit and ejector

1. A gas turbine engine, the engine comprising:

a vane assembly comprising a flowpath wall,

wherein a fluid circuit is extended through the flowpath wall, and

wherein the fluid circuit defines a first inlet opening in fluid communication with a first cavity to receive a first flow of fluid through the fluid circuit, and

wherein the vane assembly comprises an ejector positioned at the fluid circuit,

wherein the ejector defines a second inlet opening in fluid communication with a second cavity to receive a second flow of fluid through the ejector and into the fluid circuit, the second cavity being fluidly separated from the first cavity, the second flow of fluid having a higher pressure and a higher temperature than the first flow of fluid,

wherein the ejector comprises a nozzle positioned downstream of the second inlet opening relative to the second flow of fluid toward the fluid circuit, and

wherein the nozzle is configured to urge the first fluid flow through the fluid circuit by ejecting the second flow of fluid from the second inlet opening through the nozzle into the fluid circuit.

2. The gas turbine engine of claim 1 , wherein the second inlet opening is positioned downstream along the fluid circuit of the first inlet opening.

3. The gas turbine engine of claim 1 , wherein the nozzle comprises a converging cross-sectional area relative to the second flow of fluid from the second inlet opening toward an outlet opening of the fluid circuit.

4. The gas turbine engine of claim 1 , wherein the fluid circuit forms a converging-diverging nozzle positioned at the fluid circuit downstream of the nozzle.

5. The gas turbine engine of claim 1 , wherein the fluid circuit forms a tortuous flowpath, a grid structure, or a lattice structure through the vane assembly.

6. The gas turbine engine of claim 5 , wherein the fluid circuit comprises a straight portion extended along a longitudinal direction, a radial direction, or a circumferential direction, and wherein the fluid circuit comprises a curved portion configured to turn the first flow of fluid.

7. The gas turbine engine of claim 1 , wherein the vane assembly comprises an airfoil, wherein the flowpath wall is an airfoil flowpath surface, and wherein the airfoil comprises a double-wall structure through which the fluid circuit is extended.

8. The gas turbine engine of claim 7 , wherein the double-wall structure comprises the airfoil flowpath surface formed at a pressure side and a suction side of the airfoil, and wherein the double-wall structure comprises an inner airfoil surface inward of the airfoil flowpath surface, and wherein the fluid circuit is extended between the airfoil flowpath surface and the inner airfoil surface.

9. The gas turbine engine of claim 8 , wherein the airfoil forms an airfoil cavity inward of the inner airfoil surface, wherein the second cavity is the airfoil cavity, and wherein the second inlet opening is in fluid communication with the airfoil cavity to receive the second flow of fluid therefrom into the fluid circuit.

10. The gas turbine engine of claim 7 , wherein the airfoil comprises a leading edge and a trailing edge, and wherein the fluid circuit is extended from proximate to the leading edge to proximate to the trailing edge.

11. The gas turbine engine of claim 10 , wherein the first inlet opening is proximate to the leading edge relative to the trailing edge.

12. The gas turbine engine of claim 1 , the engine comprising:

a compressor section, a combustion section, and a turbine section in serial flow order, wherein the vane assembly is positioned at one or more of the compressor section, the combustion section, or the turbine section.

13. The gas turbine engine of claim 1 , wherein the vane assembly comprises an outer band, and wherein the fluid circuit extends along the outer band.

14. The gas turbine engine of claim 13 , wherein the outer band at least partially forms a gas flowpath of the engine through which combustion gases flow.

15. The gas turbine engine of claim 1 , wherein the vane assembly comprises an inner band, and wherein the fluid circuit extends through the inner band.

16. The gas turbine engine of claim 1 , wherein the fluid circuit further comprises an outlet cavity opening in fluid communication with an outlet cavity, wherein the outlet cavity is fluidly separate from a gas flowpath through the gas turbine engine.

17. A static structure for a gas turbine engine, the static structure comprising:

a flowpath wall,

wherein a fluid circuit is extended through the flowpath wall, and

wherein the fluid circuit comprises a first inlet opening in fluid communication with a first cavity to receive a first flow of fluid through the fluid circuit, and

wherein the static structure comprises an ejector positioned at the fluid circuit,

wherein the ejector comprises a second inlet opening in fluid communication with a second cavity to receive a second flow of fluid through the ejector and into the fluid circuit, the second cavity being fluidly separated from the first cavity, the second flow of fluid having a higher pressure and a higher temperature than the first flow of fluid,

wherein the ejector comprises a nozzle configured to urge the first flow of fluid through the fluid circuit by ejecting the second flow of fluid from the second inlet opening through the nozzle into the fluid circuit, and

wherein the fluid circuit further comprises an outlet opening downstream of the ejector,

wherein the outlet opening is in fluid communication with an outlet cavity, wherein the outlet cavity is fluidly separate from a gas flowpath through the gas turbine engine.

18. The static structure of claim 17 , wherein the static structure comprises a double-wall structure through which the fluid circuit is extended.

19. The static structure of claim 17 , wherein the nozzle is positioned downstream of the second inlet opening relative to the second flow of fluid into the fluid circuit.

20. The static structure of claim 17 , wherein the outlet cavity is within a nacelle, within a bypass airflow passage, or within an outer casing.