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Rotor blade having a flared tip

a technology of rotor blades and flared tips, which is applied in the direction of blade accessories, machine/engines, blade manufacture, etc., can solve the problems of difficult cooling of blade tips and general difficulty in effective cooling

Inactive Publication Date: 2016-11-03
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a technical solution for a particular problem. The solution is set forth in a clear and precise way, explaining the advantages and aspects of the invention. The reader can easily understand the technical effects of the invention by practicing it.

Problems solved by technology

An area that is generally challenging to cool effectively via the cooling medium is a blade tip portion of the turbine rotor blade, more particularly a trailing edge region of the blade tip.
The proximity of the blade tip to the turbine shroud makes the blade tip difficult to cool.
This configuration is generally due to the lack of an appropriate wall thickness of the blade along the trialing edge.

Method used

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  • Rotor blade having a flared tip
  • Rotor blade having a flared tip
  • Rotor blade having a flared tip

Examples

Experimental program
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Embodiment Construction

[0019]Reference will now be made in detail to present embodiments of the invention, one or more examples of which are illustrated in the accompanying drawings. The detailed description uses numerical and letter designations to refer to features in the drawings. Like or similar designations in the drawings and description have been used to refer to like or similar parts of the invention. As used herein, the terms “first”, “second”, and “third” may be used interchangeably to distinguish one component from another and are not intended to signify location or importance of the individual components. The terms “upstream” and “downstream” refer to the relative direction with respect to fluid flow in a fluid pathway. For example, “upstream” refers to the direction from which the fluid flows, and “downstream” refers to the direction to which the fluid flows. The term “radially” refers to the relative direction that is substantially perpendicular to an axial centerline of a particular compone...

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Abstract

A rotor blade includes an airfoil having a blade tip and a tip cavity formed at the blade tip. The blade tip defines a radially outer surface of the airfoil. The tip cavity includes a tip cap that is recessed radially inwardly from the tip and surrounded by pressure and suction side walls of the airfoil. The tip cap is in fluid communication with an internal cavity defined within the airfoil. A portion of at least one of the suction side wall or the pressure side wall that defines the tip cavity extends obliquely outwardly from the tip cavity. A plurality of slots is defined in at least one of the suction side wall or the pressure side wall along the radially outer surface proximate to the trailing edge of the airfoil.

Description

FIELD OF THE INVENTION[0001]The present invention generally relates to a rotor blade for a turbine. More particularly, this invention involves a rotor blade having a flared tip configured for cooling a trailing edge portion of the rotor blade.BACKGROUND OF THE INVENTION[0002]In an air-ingesting turbo machine (e.g., a gas turbine), air is pressurized by a compressor and then mixed with fuel and ignited within an annular array of combustors to generate combustion gases. The hot gases are routed through a liner and into a hot gas path defined within a turbine section of the turbo machine. Kinetic energy is extracted from the combustion gases via one or more rows of turbine rotor blades that are connected to a rotor shaft. The extracted kinetic energy causes the rotor shaft to rotate, thus producing work.[0003]The turbine rotor blades or blades generally operate in extremely high temperature environments. In order to achieve adequate service life, the blades typically include various in...

Claims

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Application Information

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IPC IPC(8): F01D5/18
CPCF01D5/186F01D5/141F01D5/189F01D5/20F05D2250/314F05D2250/713F05D2250/324
Inventor JONES, JEFFREY CLARENCEZHANG, XIUZHANG JAMES
Owner GENERAL ELECTRIC CO