Nozzle with guiding devices

Patent metadata

Field	Value
Publication number	US-9279387-B2
Application number	US-201314072073-A
Country	US
Kind code	B2
Filing date	Nov 5, 2013
Priority date	Nov 8, 2012
Publication date	Mar 8, 2016
Grant date	Mar 8, 2016

Abstract

A nozzle has a nozzle surface area and a nozzle rim, on which first and second guiding devices are alternatingly provided in the circumferential direction, where the first guiding devices are of the nozzle-type design and the second guiding devices are of the diffuser-type design. The first guiding devices each have a first azimuthal guide wall and two wall elements. The second guiding devices each have a second azimuthal guide wall and two wall elements. A wall element connects a first guiding device and a second guiding device. At least some of the first azimuthal guide walls of the first guiding device and at least some of the second azimuthal guide walls of the second guiding device have differing axial lengths, so that first and second trailing edges thereof have differing axial positions.

First claim

The invention claimed is:

1. A nozzle comprising:
a nozzle surface area and a nozzle rim,
first and second guiding devices alternatingly provided on the nozzle rim in a circumferential direction,
a plurality of wall elements,
wherein the first guiding devices have a converging shape in a flow direction,
wherein the second guiding devices have a diffusing shape in the flow direction,
wherein the first guiding devices each have a first guide wall circumferentially extending between two first adjacent ones of the wall elements, with the first guide wall forming a first trailing edge and two first edges to the two first adjacent ones of the wall elements,
wherein the second guiding devices each have a second guide wall circumferentially extending between two second adjacent ones of the wall elements, with the second guide wall forming a second trailing edge and two second edges to the two second adjacent ones of the wall elements, and
wherein each wall element connects a first guiding device and a second guiding device while forming part of both guiding devices, with each wall element having a first edge to one of the first guide walls, a second edge diverging from the first edge in an axial direction toward one of the second guide walls and a trailing edge,
wherein at least some of the first guide walls of the first guiding devices and at least some of the second guide walls of the second guiding devices have different axial lengths, so that the first and second trailing edges have different axial positions;
wherein the wall elements have a curved course in the axial direction.

2. The nozzle in accordance with claim 1 , wherein the trailing edges of the first and second guide walls run in the circumferential direction.

3. The nozzle in accordance with claim 2 , wherein at least some of the trailing edges of the wall elements run obliquely to the circumference and have an axial and a radial component.

4. The nozzle in accordance with claim 1 , wherein the wall elements are aligned in a radial direction.

5. The nozzle in accordance with claim 1 , wherein the wall elements run obliquely to the circumference and have a radial component and a component in the circumferential direction.

6. The nozzle in accordance with claim 1 , wherein adjacent wall elements converge and diverge alternately and in pairs in the axial direction.

7. The nozzle in accordance with claim 1 , wherein each of the first and the second guide walls have inclinations relative to the flow direction at the nozzle rim and the inclinations of the first guide walls are different from the inclinations of the second guide walls.

8. The nozzle in accordance with claim 1 , wherein the first guide walls are inclined radially outwards and the second guide walls are inclined radially inwards, or vice versa.

9. The nozzle in accordance with claim 1 , wherein at least one chosen from the first guiding devices and the second guiding devices are made from segments of the nozzle surface area.

10. The nozzle in accordance with claim 1 , wherein at least one chosen from the first guiding devices and the second guiding devices are provided as a retrofit kit and fastened to the nozzle surface area.

11. A nozzle comprising:
a nozzle surface area and a nozzle rim,
first and second guiding devices alternatingly provided on the nozzle rim in a circumferential direction,
a plurality of wall elements,
wherein the first guiding devices have a converging shape in a flow direction,
wherein the second guiding devices have a diffusing shape in the flow direction,
wherein the first guiding devices each have a first guide wall circumferentially extending between two first adjacent ones of the wall elements, with the first guide wall forming a first trailing edge and two first edges to the two first adjacent ones of the wall elements,
wherein the second guiding devices each have a second guide wall circumferentially extending between two second adjacent ones of the wall elements, with the second guide wall forming a second trailing edge and two second edges to the two second adjacent ones of the wall elements, and
wherein each wall element connects a first guiding device and a second guiding device while forming part of both guiding devices, with each wall element having a first edge to one of the first guide walls, a second edge diverging from the first edge in an axial direction toward one of the second guide walls and a trailing edge,
wherein at least one chosen from the first trailing edges of the first guide walls and at least some of the second trailing edges of the second guide walls run obliquely to the circumferential direction;
wherein at least some of the first and second trailing edges run at an angle of less than or equal to +/−45° to a nozzle main axis.

12. The nozzle in accordance with claim 11 , wherein at least some of the trailing edges of adjacent wall elements have a different axial position.

13. The nozzle in accordance with claim 11 , wherein the wall elements are aligned in a radial direction.

14. The nozzle in accordance with claim 11 , wherein the wall elements run obliquely to the circumference and have a radial component and a component in the circumferential direction.

15. The nozzle in accordance with claim 11 , wherein the wall elements have straight edges and are shaped as triangles.

16. The nozzle in accordance with claim 11 , wherein the wall elements have a curved course in the axial direction.

17. The nozzle in accordance with claim 11 , wherein adjacent wall elements converge and diverge alternately and in pairs in the axial direction.

18. The nozzle in accordance with claim 11 , wherein each of the first and the second guide walls have inclinations relative to the flow direction at the nozzle rim and the inclinations of the first guide walls are different from the inclinations of the second guide walls.

19. The nozzle in accordance with claim 11 , wherein the first guide walls are inclined radially outwards and the second guide walls are inclined radially inwards, or vice versa.

20. The nozzle in accordance with claim 11 , wherein at least one chosen from the first guiding devices and the second guiding devices are made from segments of the nozzle surface area.

21. The nozzle in accordance with claim 11 , wherein at least one chosen from the first guiding devices and the second guiding devices are provided as a retrofit kit and fastened to the nozzle surface area.

22. A nozzle comprising:
a nozzle surface area and a nozzle rim,
first and second guiding devices alternatingly provided on the nozzle rim in a circumferential direction,
a plurality of wall elements,
wherein the first guiding devices have a converging shape in a flow direction,
wherein the second guiding devices have a diffusing shape in the flow direction,
wherein the first guiding devices each have a first guide wall circumferentially extending between two first adjacent ones of the wall elements, with the first guide wall forming a first trailing edge and two first edges to the two first adjacent ones of the wall elements,
wherein the second guiding devices each have a second guide wall circumferentially extending between two second adjacent ones of the wall elements, with the second guide wall forming a second trailing edge and two second edges to the two second adjacent ones of the wall elements, and
wherein each wall element connects a first guiding device and a second guiding device while forming part of both guidi

Assignees

• Rolls Royce Deutschland

Inventors

• Rose Marco
• Spieweg Rene

Classifications

• F02K1/48

  Corrugated nozzles · CPC title

• F02K1/386 Primary

  mixing devices in the jet pipe, e.g. for mixing primary and secondary flow · CPC title

• F02K1/46 Primary

  Nozzles having means for adding air to the jet or for augmenting the mixing region between the jet and the ambient air, e.g. for silencing (F02K1/28, F02K1/36, F02K1/38 take precedence) · CPC title

• Y02T50/671

  Cross-Sectional Technologies · mapped topic

• F05D2250/183

  zigzag · CPC title