Aircraft engine blading

Patent metadata

Field	Value
Publication number	US-9695694-B2
Application number	US-201113307793-A
Country	US
Kind code	B2
Filing date	Nov 30, 2011
Priority date	Nov 30, 2010
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A blading for a turbine, in particular a gas turbine, is disclosed. The blades of the blading in a section near the tip have a distribution ratio (t/l) of at least 0.70, in particular at least 0.9, and/or at most 0.97, in particular at most 0.95. A downstream flow angle (α) is at most 167°, in particular at most 165°, and at least 155°, in particular at least 160°. In addition, or alternatively, an acceleration ratio (w 2 /w 1 ) is at least 1.4, in particular at least 1.5.

First claim

What is claimed is:

1. A blading for a gas turbine of an aircraft engine, comprising:
blades, wherein at least one of the blades has a distribution ratio (t/l) in an area between 95% and 100% of a height of the at least one of the blades that is at least 0.90 and at most 0.97, a downstream flow angle (α) that is at least 160° and at most 167°, and an acceleration ratio (w 2 /w 1 ) of at least 1.4 in an area between 0% and 5% of the height of the at least one of the blades and grows larger in a direction toward the area between 95% and 100% of the height of the at least one of the blades by a factor greater than or equal to 2.

2. The blading according to claim 1 , wherein moving blades of the blades of the blading each have at least one seal tip.

3. The blading according to claim 1 , wherein a degree of reaction of the blading is at least 0.35 and/or at most 0.6.

4. The blading according to claim 1 , wherein profile sections of the moving blades of the blading are threaded radially over a center of gravity.

5. The blading according to claim 1 , wherein a stagnation point flow line to a blade front edge meets a blade profile in an area of a front edge radius.

6. An aircraft engine with a blading according to claim 1 , wherein the blading is arranged in a high-speed low-pressure turbine.

Assignees

• Huebner Norbert
• Mtu Aero Engines Gmbh

Inventors

• Huebner Norbert

Classifications

• F01D5/141 Primary

  Shape, i.e. outer, aerodynamic form (F01D5/148 - F01D5/20 take precedence; blade construction F01D5/147) · CPC title

• F05D2250/74

  given by a set or table of xyz-coordinates · CPC title

• Y02T50/673

  Cross-Sectional Technologies · mapped topic

• Y02T50/60

  Efficient propulsion technologies, e.g. for aircraft · CPC title