Turbomachine

• US 10,184,339 B2
• Filed: 02/06/2013
• Issued: 01/22/2019
• Est. Priority Date: 02/10/2012
• Status: Active Grant

• Current Assignee: MTU Aero Engines GmbH (MTU)
• Original Assignee: MTU Aero Engines GmbH (MTU)
• Inventors: Gomez, Sergio Elorza, Schneider, Tim
• Primary Examiner(s): White, Dwayne J
• Application Number:
  US13/760,604
• Publication Number:
  US 20130209224A1
• Time in Patent Office: 2,176 Days
• Field of Search: 416198 A, 416223 R, 416228, 416231 R
• CPC Class Codes: F01D 1/04 traversed by the working-fluid substantially axially
• CPC Class Codes: F01D 5/146 of blades with tandem configuration, split blades or slotted blades
• CPC Class Codes: F01D 9/041 using blades F01D5/148 takes precedence
• CPC Class Codes: F04D 29/544 Blade shapes
• CPC Class Codes: F04D 29/563 specially adapted for elastic fluid pumps
• CPC Class Codes: F05D 2240/301 Cross-sectional characteristics
• CPC Class Codes: Y02T 50/60 Efficient propulsion technologies, e.g. for aircraft

Abstract

A turbomachine including at least one blade-row group that is arranged in the main flow path and at least two rows of blades that are adjacent to each other in the main flow direction, each row having a plurality of blades (38, 40), whereby a narrow cross section and a degree of overlap between the blades of the upstream row of blades and the blades of the downstream row of blades vary starting at the center of the main flow path in the direction of at least one main flow limiter.

Claims

1. A turbomachine comprising:

at least one blade-row group arranged in a main flow path including an upstream row of blades and a downstream row of further blades adjacent to each other in a main flow direction, a narrowest cross section and a degree of overlap between the blades of the upstream row and the further blades of the downstream row varying starting at a center of the main flow path in the direction of a main flow limiter;

wherein the degree of overlap increases steadily in the direction of the main flow limiter.

2. The turbomachine as recited in claim 1 wherein the narrowest cross section increases steadily in the direction of the main flow limiter.

3. The turbomachine as recited in claim 1 wherein the narrowest cross section increases in the direction of the main flow limiter and then decreases.

4. The turbomachine as recited in claim 1 wherein the narrowest cross section increases in the direction of the main flow limiter and then remains constant.

5. The turbomachine as recited in claim 1 wherein the narrowest cross section decreases steadily in the direction of the main flow limiter.

6. The turbomachine as recited in claim 1 wherein the narrowest cross section decreases in the direction of the main flow limiter and then increases.

7. The turbomachine as recited in claim 1 wherein the narrowest cross section decreases in the direction of the main flow limiter and then remains constant.

8. A turbomachine comprising:

at least one blade-row group arranged in a main flow path including an upstream row of blades and a downstream row of further blades adjacent to each other in a main flow direction, a narrowest cross section and a degree of overlap between the blades of the upstream row and the further blades of the downstream row varying starting at a center of the main flow path in the direction of a main flow limiter;

wherein the degree of overlap increases in the direction of the main flow limiter and then decreases.

9. A turbomachine comprising:

at least one blade-row group arranged in a main flow path including an upstream row of blades and a downstream row of further blades adjacent to each other in a main flow direction, a narrowest cross section and a degree of overlap between the blades of the upstream row and the further blades of the downstream row varying starting at a center of the main flow path in the direction of a main flow limiter;

wherein the degree of overlap increases in the direction of the main flow limiter and then remains constant.

10. A turbomachine comprising:

at least one blade-row group arranged in a main flow path including an upstream row of blades and a downstream row of further blades adjacent to each other in a main flow direction, a narrowest cross section and a degree of overlap between the blades of the upstream row and the further blades of the downstream row varying starting at a center of the main flow path in the direction of a main flow limiter;

wherein the narrowest cross section decreases in the direction of the main flow limiter and then remains constant.