Engine nacelle for a gas turbine engine

Patent metadata

Field	Value
Publication number	US-11428123-B2
Application number	US-202117235542-A
Country	US
Kind code	B2
Filing date	Apr 20, 2021
Priority date	May 11, 2020
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

An engine pod for a gas turbine engine which includes a pod wall having an inside and an outside. The pod wall includes a fixed downstream portion and a displaceable upstream portion which is displaceable in the axial direction between a first upstream position and a second downstream position. At its downstream end facing the fixed portion, the upstream portion forms a radially outer rear edge and axially spaced therefrom a radially inner rear edge, with a recess in between. It is provided that adjacent to the recess, an air-permeable structure is formed in the upstream portion which is intended and configured, in the first upstream position of the displaceable portion, to conduct air flowing in the region of the recess to the inside of the displaceable portion. According to a further aspect of the invention, the axial position of the radially inner rear edge varies in the circumferential direction.

First claim

The invention claimed is:

1. An engine pod for a gas turbine engine, having:
a pod wall having an inside and an outside,
an engine intake which receives air necessary for an associated gas turbine engine and is delimited by the inside of the pod wall,
wherein the pod wall comprises:
a downstream fixed portion,
an upstream displaceable portion which is displaceable in the axial direction relative to the fixed portion between a first upstream position and a second downstream position,
wherein in the first upstream position of the displaceable portion, an annular additional flow channel is formed which extends between the fixed portion and the displaceable portion, wherein via the additional flow channel, surrounding air is flowable into the engine intake from the outside of the engine pod,
wherein in the second downstream position of the displaceable portion, the fixed portion and the displaceable portion adjoin one another, wherein the additional flow channel is closed, and
wherein at its downstream end facing the fixed portion, the displaceable upstream portion forms a radially outer rear edge and axially spaced therefrom, a radially inner rear edge, with a recess in between,
wherein adjacent to the recess, an air-permeable structure is formed in the displaceable portion which is intended and configured, in the first upstream position of the displaceable portion, to conduct air flowing in the region of the recess to the inside of the displaceable portion.

2. The engine pod according to claim 1 , wherein the air-permeable structure is configured as a sandwich panel with a core layer in honeycomb form and with an inner cover layer, wherein the inner cover layer is provided with openings for air passage.

3. The engine pod according to claim 2 , wherein the sandwich panel furthermore forms an outer cover layer, wherein the outer cover layer is also provided with openings for air passage.

4. The engine pod according to claim 1 , wherein the air-permeable structure extends radially from the recess to the inside of the displaceable portion.

5. The engine pod according to claim 1 , wherein at its upstream end, the fixed portion has a convex intake lip, a shape of which corresponds to a shape of the recess of the displaceable portion so that when the displaceable portion is in the second downstream position, the intake lip and the recess bear against one another.

6. The engine pod according to claim 5 , wherein in the second downstream position of the displaceable portion, the air-permeable structure forms a sound-absorbing panel for engine noise.

7. The engine pod according to claim 6 , wherein in the second downstream position of the displaceable portion, a sound-reflecting rear side of the sound-absorbing panel is formed by the intake lip of the fixed portion.

8. The engine pod according to claim 1 , wherein the air-permeable structure is furthermore suitable for conducting air from the inside of the displaceable portion to the outside of the displaceable portion.

9. The engine pod according to claim 1 , wherein a sound-absorbing structure is integrated in the fixed portion of the pod wall and is positioned in the fixed portion such that in the second downstream position of the displaceable portion, the sound-absorbing structure comes into contact with the air-permeable structure.

10. The engine pod according to claim 9 , wherein the sound-absorbing structure of the fixed portion is configured as a sandwich panel with a core layer in honeycomb form and with an inner cover layer, wherein the inner cover layer is provided with openings for air passage, and wherein in the second downstream position of the displaceable portion, the inner cover layer adjoins the sound-absorbing sandwich panel.

11. The engine pod according to claim 1 , wherein an axial position of the radially inner rear edge varies in a circumferential direction.

12. The engine pod according to claim 11 , wherein the axial position of the radially inner rear edge varies periodically in the circumferential direction.

13. The engine pod according to claim 11 , wherein the axial position of the radially inner rear edge varies in rectangular, zigzag or undulating form in the circumferential direction.

14. The engine pod according to claim 1 , wherein the engine intake is a supersonic intake.

15. A gas turbine engine with an engine pod according to claim 1 .

16. An engine pod for a gas turbine engine, having:
a pod wall having an inside and an outside,
an engine intake which receives air necessary for an associated gas turbine engine and is delimited by the inside of the pod wall,
wherein the pod wall comprises:
a downstream fixed portion,
an upstream displaceable portion which is displaceable in the axial direction relative to the fixed portion between a first upstream position and a second downstream position,
wherein in the first upstream position of the displaceable portion, an annular additional flow channel is formed which extends between the fixed portion and the displaceable portion, wherein via the additional flow channel, surrounding air is flowable into the engine intake from the outside of the engine pod,
wherein in the second downstream position of the displaceable portion, the fixed portion and the displaceable portion adjoin each other, wherein the additional flow channel is closed, and
wherein at its downstream end facing the fixed portion, the displaceable portion forms a radially outer rear edge and axially spaced therefrom a radially inner rear edge,
wherein an axial position of the radially inner rear edge varies in a circumferential direction.

17. The engine pod according to claim 16 , wherein the axial position of the radially inner rear edge varies periodically in the circumferential direction.

18. The engine pod according to claim 16 , wherein the axial position of the radially inner rear edge varies in rectangular form in the circumferential direction.

19. The engine pod according to claim 16 , wherein the axial position of the radially inner rear edge varies in zigzag form in the circumferential direction.

20. The engine pod according to claim 16 , wherein the axial position of the radially inner rear edge varies in undulating form in the circumferential direction.

Assignees

• Rolls Royce Deutschland Ltd & Co Kg

Inventors

• Rose Marco
• Mack Gregory
• Richter Christoph
• Holste Fredi
• Omar Marquez Gutierrez Carlos
• Dierke Jürgen

Classifications

• F01D25/24 Primary

  Casings (modified for heating or cooling F01D25/14); Casing parts, e.g. diaphragms, casing fastenings (casings for rotary machines or engines in general F16M {; special arrangements in stators dealing with breaking-off of part of rotor F01D21/045}) · CPC title

• F05D2220/32

  in gas turbines · CPC title

• F05D2250/41

  with one degree of freedom · CPC title

• F02C7/04 Primary

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

• F05D2250/182

  crenellated, notched · CPC title