NDLI: Measurements of internal and external heat transfer for turbine blade applications.

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Measurements of internal and external heat transfer for turbine blade applications.

Content Provider	CiteSeerX
Author	Elder, Erin N. Karen, Advisor Thole, A.
Abstract	Efficiency and power output of gas turbines improve with an increase in turbine rotor inlet temperatures. Innovative cooling methods are used by blade designers to raise turbine inlet temperatures to levels higher than the melting temperatures of the blade material. These increased turbine inlet temperatures are achieved by utilizing a combination of internal convective cooling and external film-cooling. Internal convective cooling, flowing air through the internal passages of the blade, is further augmented by pin fin arrays. These pin fins serve to turbulate the air thereby augmenting convective cooling. The coolant flow exits internal cooling passages to the external side of the blade and forms a protective layer along the external surface of the blade further cooling the blade. In the current study, a novel low-speed large-scale wind tunnel facility was developed with the capability to measure internal heat transfer coefficients, using thermal liquid crystallography, and external adiabatic effectiveness, using infrared thermography. The test facility has been used to characterize several proprietary cooling configurations, and is currently in use for the testing of public pin fin designs.
File Format	PDF
Access Restriction	Open
Subject Keyword	Internal Convective Cooling Turbine Inlet Temperature External Surface Several Proprietary Cooling Configuration Melting Temperature Coolant Flow Internal Heat Transfer Coefficient External Film-cooling Public Pin Fin Design Thermal Liquid Crystallography Test Facility Pin Fin Array External Side Blade Designer Infrared Thermography Convective Cooling Protective Layer Current Study Turbine Rotor Inlet Temperature Internal Passage Innovative Cooling Method Internal Cooling Passage Gas Turbine External Adiabatic Effectiveness Power Output Blade Material
Content Type	Text

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