Methods and apparatuses for providing film cooling to turbine components
a technology of film cooling and turbine components, which is applied in the direction of machines/engines, manufacturing tools, liquid fuel engines, etc., can solve the problems of affecting the efficiency of the turbin
Inactive Publication Date: 2010-01-14
GENERAL ELECTRIC CO
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- Claims
- Application Information
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Problems solved by technology
However, due to the high temperatures, various components of the gas turbine situated in or along the hot gas path often experience extremely high thermal loading.
For example, the turbine blades utilized in the turbine may be damaged or degraded by continuous exposure to the hot gases.
Thus, the introduction of the relatively cold air often directly leads to degradation in the efficiency of the turbine.
However, these conventional metered apertures are typically angled against the surface of a slot, causing the relatively cool air to impinge on the back surface of the slot and leading to increased turbulence inside the slot.
This turbulence makes it difficult for the relatively cold air to achieve uniformity before exiting into the hot gas path.
Method used
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[0017]Illustrative embodiments of the invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. Indeed, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements. Like numbers refer to like elements throughout.
[0018]Disclosed are methods and apparatuses for providing film cooling or cooling gas to turbine components. Cooling gas flow passages may be utilized in accordance with various embodiments of the invention in order to cool turbine components that are within a hot gas path. A turbine component may include one or more internal compartments, also referred to as cooling gas compartments that receive a cooling gas from a cooling gas source. Cooling gas flow passages may then facilitate film cooling ...
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Abstract
Methods and apparatuses for film cooling of one or more turbine components are provided. A cooling gas flow passage provides a cooling gas to an turbine component with the hot gas path of a turbine. The cooling gas flow passage includes at least one feed aperture operable to receive cooling gas from at least one cooling gas compartment associated with a turbine component. The cooling gas flow passage also includes at least one slot with a converging portion having a first opening and a second opening, where the first opening receives the cooling gas from the feed aperture, and the second opening provides the cooling gas to at least a portion of an outer surface of the turbine component.
Description
FIELD OF THE INVENTION[0001]This invention relates generally to turbines and more specifically, to providing film cooling for turbines.BACKGROUND OF THE INVENTION[0002]Turbines are utilized in a variety of aviation, industrial, and power generation applications. A turbine in general may be a rotating device that utilizes the action of a fluid, such as one or more hot gases, on it to produce work. In a conventional gas turbine, one or more pressurized, high temperature gases are typically utilized as the driving force of the gas turbine. A typical gas turbine includes three major components: a compressor, a combustor, and a turbine. In a typical operation of a gas turbine, the compressor compresses incoming air (or gas) to a high pressure and the combustor ignites fuel and mixes the fuel with the high pressure air to produce a high temperature, high velocity gas. The turbine then typically extracts energy from the high temperature, high velocity gas as one or more sets of rotating tu...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F01D25/12B21K25/00F01D5/18
CPCF01D5/186F05D2260/202Y10T29/49321Y02T50/676Y02T50/673Y02T50/60
Inventor JOHNS, DAVID R.BRITTINGHAM, ROBERT A.PHILLIPS, JAMES S.
Owner GENERAL ELECTRIC CO