Mixing device and turbofan engine having such mixing device

Patent metadata

Field	Value
Publication number	US-9771896-B2
Application number	US-201414244050-A
Country	US
Kind code	B2
Filing date	Apr 3, 2014
Priority date	Apr 4, 2013
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

The invention relates to a mixing device and a turbofan engine having such a mixing device 30 for mixing a first gas flow 40 with a second gas flow 50 in a turbofan engine 20 , having an actuating device 95 and walls 60 , which bound a channel 65 for the first gas flow 40 and a channel 70 lying radially outside for the second gas flow 50 , the actuating device 95 comprising a coupling element 110 that is coupled to the walls ( 60 ), the actuating device 95 being designed to pivot the walls 60 between a first position and a second position disposed radially outside relative to the first position, the actuating device 95 comprising an adjusting ring 105 that can be rotated between a first rotating position and a second rotating position in the peripheral direction and that is joined to the coupling element 110.

First claim

The invention claimed is:

1. A mixing device for mixing a first gas flow with a second gas flow in a turbofan engine, comprising:
an actuating device and walls that bound a radially inner-lying channel for the first gas flow and a radially outer-lying channel for the second gas flow,
the actuating device comprising a first coupling element, having a first end and a second end; the first end of the first coupling element being coupled to the walls,
the actuating device being configured and arranged to pivot the walls between a first position and a second position disposed radially outside relative to the first position, by the first coupling element, wherein
the actuating device comprises an adjusting ring that rotates between a first rotating position and a second rotating position in a peripheral direction and that is joined to the first coupling element,
the first coupling element being configured and arranged as rigid and being coupled to the adjusting ring via the second end of the first coupling element whereby rotating the adjusting ring between the first rotating position and the second rotating position, the walls are pivoted by the first coupling element between the first position and the second position corresponding to the rotation of the adjusting ring;
a support structure, which is disposed bounding the walls in an axial direction, the support structure comprising a fastening element, where axially, the adjusting ring is disposed between the fastening element and the walls; and
a second coupling element having a first end and a second end; the first end of the second coupling element being coupled to the fastening element of the support structure and the second end of the second coupling element being coupled to the adjusting ring wherein the first end of the second coupling element and the first end of the first coupling element are axially on opposing sides of and axially spaced apart from the adjusting ring.

2. The mixing device according to claim 1 , wherein the second end of the first coupling element and the second end of the second coupling element are coupled to the adjusting ring next to one another in the peripheral direction.

3. The mixing device according to claim 1 , wherein the first coupling element comprises a coupling rod and there is provided at least one articulation having a first articulation section and a second articulation section connected to the first articulation section, the first articulation section being pivotable opposite the second articulation section around at least one axis, the first articulation section being disposed on at least one longitudinal end of the coupling rod, and the second articulation section being coupled to the fastening element or to the adjusting ring or to the walls.

4. The mixing device according to claim 2 , wherein the first coupling element and the second coupling element are configured identically.

5. The mixing device according to claim 2 , wherein the first coupling element has a lengthwise extension that is different from a lengthwise extension of the second coupling element.

6. The mixing device according to claim 1 , wherein the walls comprise a first wall segment and a second wall segment disposed lying radially outside relative to the first wall segment, the first coupling element being joined to the first wall segment and the second wall segment being coupled to the first wall segment.

7. The mixing device according to claim 6 , wherein an articulation, which joins the first wall segment so as to be pivotable around a pivoting axis, is disposed on the support structure, the pivoting axis of the articulation being disposed perpendicular to an axis of rotation of the adjusting ring.

8. The mixing device according to claim 7 , wherein on the first wall segment on an outside, an articulation piece is disposed, the first coupling element being joined to the articulation piece radially outside on the articulation piece ( 160 ), distanced relative to the pivoting axis.

9. The mixing device of claim 1 , wherein the mixing device is employed in the turbofan engine having a fan, an aircraft gas turbine coupled to the fan, and wherein the mixing device, the aircraft gas turbine being configured and arranged to provide the first gas flow and the fan being configured and arranged to provide the second gas flow flowing radially outside relative to the first gas flow, the mixing device being disposed on a downstream side on the aircraft gas turbine and being configured and arranged to mix the first gas flow at least partially with the second gas flow.

Assignees

• MTU Aero Engines AG

Inventors

• Klingels Hermann
• Klaen Stephan
• Scherer Christian
• Vogel Uwe

Classifications

• F02K1/46

  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

• F05D2250/61

  corrugated · CPC title

• F02K1/48

  Corrugated nozzles · CPC title

• F02K3/075 Primary

  controlling flow ratio between flows · CPC title

• F02K1/386

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