Asymmetric submerged air intake

Patent metadata

Field	Value
Publication number	US-11105264-B2
Application number	US-201916719065-A
Country	US
Kind code	B2
Filing date	Dec 18, 2019
Priority date	Dec 18, 2019
Publication date	Aug 31, 2021
Grant date	Aug 31, 2021

Abstract

The invention regards an asymmetric submerged air intake in a surface of a structure, wherein the air intake includes a submerged ramp extending from the surface. The ramp has a front end, a rear end, a ramp floor and two ramp side walls. The ramp floor is inclined with respect to the surface. At the rear end an entrance to an internal duct of the structure is provided. It is provided that one of the ramp side walls is a straight wall extending straight in the longitudinal direction of the ramp and that the other of the ramp side walls is a curved wall that diverges from the straight wall along the length of the ramp.

First claim

The invention claimed is:

1. An asymmetric submerged air intake in a surface of a structure, the air intake comprising:
a submerged ramp extending from the surface, the ramp having a front end, a rear end, a ramp floor, and two ramp side walls, the ramp defining a longitudinal direction extending from the front end to the rear end,
wherein the front end is at the surface,
wherein the ramp floor is inclined with respect to the surface,
wherein the rear end is at an entrance to an internal duct of the structure,
wherein the entrance to the internal duct is defined by a lip extending from the surface and into the ramp,
wherein one of the ramp side walls is a straight wall extending straight in the longitudinal direction of the ramp, and
wherein the other of the ramp side walls is a curved wall that diverges from the straight wall along a length of the ramp.

2. The intake of claim 1 , further comprising at least one opening is formed in the curved wall.

3. The intake of claim 2 , wherein the at least one opening includes a plurality of openings formed in the curved wall.

4. The intake of claim 2 , wherein the at least one opening is formed adjacent to the entrance to the internal duct.

5. The intake of claim 2 , wherein the at least one opening extends from a bottom of the curved wall.

6. The intake of claim 2 , wherein a position of the at least one opening corresponds to a position of vortexes formed in the air intake.

7. The intake of claim 2 , wherein the at least one opening is formed as a cutout in the curved wall or a gill.

8. The intake of claim 1 , further comprising the internal duct connected to the entrance, wherein the internal duct comprises a bent section bent in a lateral direction.

9. The intake of claim 1 , wherein the ramp floor is arranged at a ramp angle with respect to the surface, wherein the ramp angle is in a range between 5 and 12 degrees.

10. The intake of claim 9 , wherein the ramp angle is in a range between 6 and 8 degrees.

11. The intake of claim 1 , wherein the ramp floor is flat.

12. The intake of claim 1 , wherein the curved wall, in a course from the front end to the rear end, comprises one inflection point at which a curve that the curved wall defines in a top view changes curvature.

13. The intake of claim 12 , wherein the curved wall runs parallel to the straight wall both at the front end and at the rear end.

14. The intake of claim 1 , wherein the ramp side walls run straight in a vertical direction at least adjacent to the surface.

15. The intake of claim 1 , wherein at least one of the ramp side walls is at least partly curved in a lateral direction.

16. The intake of claim 15 , further comprising a transition zone positioned between the ramp floor and at least one of the ramp side walls, wherein at least the curved ramp side wall is curved in the lateral direction in the transition zone between the ramp floor and the at least one of the ramp side walls and runs straight in a vertical direction between the transition zone and the surface.

17. The intake of claim 1 , wherein the entrance to the internal duct defines a plane and wherein the straight wall intersects with the plane at a right angle.

18. A gas turbine engine comprising a surface, wherein the surface comprises a submerged air intake, the air intake comprising:
a submerged ramp extending from the surface, the ramp having a front end and a rear end, a ramp floor, and two ramp side walls, the ramp defining a longitudinal direction extending from the front end to the rear end,
wherein the front end is at the surface,
wherein the ramp floor is inclined with respect to the surface,
wherein the rear end is at an entrance to an internal duct of the structure,
wherein the entrance to the internal duct is defined by a lip extending from the surface and into the ramp,
wherein one of the ramp side walls is a straight wall extending straight in the longitudinal direction of the ramp, and
wherein the other of the ramp side walls is a curved side wall that diverges from the straight wall along a length of the ramp.

19. The gas turbine engine of claim 18 , wherein the surface is a surface of a nacelle.

20. The gas turbine engine of claim 18 , wherein the surface is a surface of a casing of a core of the gas turbine engine.

Assignees

• Rolls Royce Deutschland Ltd & Co Kg

Inventors

• Todorovic Predrag

Classifications

• F02C7/04 Primary

  Air intakes for gas-turbine plants or jet-propulsion plants · CPC title

• F02C7/18

  the medium being gaseous, e.g. air {(F02C7/125 takes precedence)} · CPC title

• F05D2220/32

  in gas turbines · CPC title