Experimental Study on the Film Cooling Performance at the Leading Edge of Turbine Blade Using Infrared Thermography

Kwang Su Kim; Youn Jea Kim

doi:10.4028/www.scientific.net/KEM.326-328.1161

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 326-328Experimental Study on the Film Cooling Performance...

Experimental Study on the Film Cooling Performance at the Leading Edge of Turbine Blade Using Infrared Thermography

Abstract:

In order to protect turbine blades from high temperature, film cooling can be applied to gas turbine engine system since it can prevent corrosion and facture of material. To enhance the film cooling performance in the vicinity of the turbine blade leading edge, flow characteristics of the film-cooled turbine blade have been investigated using a cylindrical body model. Mainstream Reynolds number based on the cylinder diameter was 1.01×105 and the mainstream turbulence intensities were about 0.2%. CO2 was used as coolant to simulate the effect of coolant-tomainstream density ratio. The effect of coolant flow rates was studied for various blowing ratios of 0.5, 0.8, 1.1 and 1.4, respectively. Results show that the blowing ratio has a strong effect on film cooling effectiveness and the coolant trajectory is sensitive to the blowing ratio.

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Periodical:

Key Engineering Materials (Volumes 326-328)

Pages:

1161-1164

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.326-328.1161

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Online since:

December 2006

Authors:

Kwang Su Kim, Youn Jea Kim

Keywords:

Cylindrical Body Model, Density Ratio, Film Cooling, Infrared Thermography (IRT)

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