Blade cascade and continuous-flow machine

Patent metadata

Field	Value
Publication number	US-9745850-B2
Application number	US-201414286584-A
Country	US
Kind code	B2
Filing date	May 23, 2014
Priority date	May 24, 2013
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

A blade cascade of a continuous-flow machine is disclosed. The blade cascade has at least one side wall that is constructed in a wave-like manner in the peripheral direction and has at least one elevation and at least one depression. At least a profile-like rib is integrated in or combined with the side wall, which has a blade profile with a pressure side and with an opposite suction side. A continuous-flow machine with such a blade cascade is also disclosed.

First claim

What is claimed is:

1. A blade cascade of a continuous-flow machine, comprising:
a first blade and a second blade;
a first side wall and a second side wall; and
a blade channel, wherein the blade channel is defined in a peripheral direction by a pressure side of the first blade and by a suction side of the second blade and is defined in a radial direction by the first side wall and the second side wall;
wherein at least one of the first side wall and the second side wall includes a side wall contouring, wherein the side wall contouring is wave-like in the peripheral direction and has an elevation, a depression, and a rib that has a blade profile with a pressure side and a suction side, wherein the elevation is a pressure side elevation which extends to a pressure-side blade wall of the first blade and starts from a leading edge of the first blade and extends to a trailing edge of the first blade, wherein the elevation has a smaller amplitude than the rib, and wherein the depression extends to a suction-side blade wall of the second blade.

2. The blade cascade according to claim 1 , wherein the side wall contouring extends to a downstream side wall edge.

3. The blade cascade according to claim 1 , wherein the elevation and/or the depression has a varying amplitude in a flow direction.

4. The blade cascade according to claim 1 , wherein the pressure side and the suction side of the rib are oriented radially.

5. The blade cascade according to claim 4 , wherein the rib has a height of 30% maximum of a blade pitch.

6. The blade cascade according to claim 1 , wherein the rib is arranged in a range of approximately 40% to 100% of an axial blade width.

7. The blade cascade according to claim 1 , wherein the rib is arranged in a range of approximately 0% to 60% of an axial blade width.

8. The blade cascade according to claim 1 , wherein the side wall contouring has rounded edges.

9. The blade cascade according to claim 1 , wherein the rib transitions, front and rear, smoothly into an adjoining surface section in a flow direction.

10. The blade cascade according to claim 1 , wherein curvature radii of the side wall contouring vary.

11. A continuous-flow machine with a blade cascade according to claim 1 .

Assignees

• MTU Aero Engines AG

Inventors

• Guendogdu Yavuz
• Gier Jochen
• Engel Karl

Classifications

• F01D5/143

  Contour of the outer or inner working fluid flow path wall, i.e. shroud or hub contour · CPC title

• F05D2240/306

  related to the suction side of a rotor blade · CPC title

• F01D5/145 Primary

  Means for influencing boundary layers or secondary circulations (for compressors F04D29/68) · CPC title

• F01D5/146

  of blades with tandem configuration, split blades or slotted blades · CPC title

• F05D2240/305

  related to the pressure side of a rotor blade · CPC title