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Turbine blade and method for cooling the turbine blade

a technology of turbine blades and cooling methods, which is applied in the direction of liquid fuel engines, vessel construction, marine propulsion, etc., can solve the problems of reducing the efficiency of the turbine, increasing the creep at the tip caps, and disrupting the flow of compressed working fluid over the rotating blades

Inactive Publication Date: 2014-02-13
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effects of this patent are set forth below. These benefits include aspects and advantages that can be realized through the use of the invention. These benefits may be easily noted while reading the description of the invention or may be learned through practice of the invention.

Problems solved by technology

Compressed working fluid that leaks around or bypasses the turbine blades reduces the efficiency of the turbine.
Although effective at reducing or preventing leakage around the rotating blades, the interaction between the shroud segments and the tip caps may result in elevated local temperatures that may reduce the low cycle fatigue limits and / or lead to increased creep at the tip caps.
However, cooling media that flows over the suction side of the rotating blade may disrupt the flow of the compressed working fluid over the rotating blades and / or reduce the operating efficiency of the rotating blades.

Method used

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  • Turbine blade and method for cooling the turbine blade
  • Turbine blade and method for cooling the turbine blade
  • Turbine blade and method for cooling the turbine blade

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Embodiment Construction

[0016]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. In addition, the terms “upstream” and “downstream” refer to the relative location of components in a fluid pathway. For example, component A is upstream from component B if a fluid flows from component A to component B. Conversely, component B is downstream from component A if component B receives a fluid flow from component A.

[0017]Each example is provided by way of explanation of the invent...

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PUM

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Abstract

A turbine blade includes an outer surface, and a rim surrounds at least a portion of the outer surface. A trench in the rim extends around at least a portion of the outer surface.

Description

FIELD OF THE INVENTION[0001]The present invention generally involves a turbine blade and a method for cooling the turbine blade.BACKGROUND OF THE INVENTION[0002]Turbines are widely used in industrial and commercial operations. A typical commercial steam or gas turbine used to generate electrical power includes alternating stages of stationary and rotating airfoils or blades. For example, stationary vanes may be attached to a stationary component such as a casing that surrounds the turbine, and rotating blades may be attached to a rotor located along an axial centerline of the turbine. A compressed working fluid, such as but not limited to steam, combustion gases, or air, flows through the turbine, and the stationary vanes accelerate and direct the compressed working fluid onto the subsequent stage of rotating blades to impart motion to the rotating blades, thus turning the rotor and performing work.[0003]Compressed working fluid that leaks around or bypasses the turbine blades reduc...

Claims

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Application Information

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IPC IPC(8): F01D5/18F01D5/14
CPCF01D5/20
Inventor GIGLIO, ANTHONY LOUISELLIS, SCOTT EDMONDBUTLER, JESSE BLAIRSAMPAYO, CAMILO ANDRES
Owner GENERAL ELECTRIC CO