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Thermophysics and Aeromechanics

2013 year, number 6

Flat plate film cooling from a single-row inclined holes embedded in a trench: effect of external turbulence and flow acceleration

A.A. Khalatov1, 2, I.I. Borisov1, Yu.Ya. Dashevskiy3, A.S. Kovalenko1, and S.V. Shevtsov1
1 Institute of Engineering Thermophysics, NAS of Ukraine, Kyiv, Ukraine
2 National Technical University of Ukraine “Kyiv Polytechnic Institute”, Kyiv, Ukraine
3 Gas Turbine Research and Production Complex Zorya-Mashproekt, Nikolaev, Ukraine
E-mail: artem.khalatov@vortex.org.ua
Keywords: film cooling, in-trench inclined holes, cooling efficiency, flow acceleration, flow external turbulence
Pages: 713719

Abstract

Results of an experimental study of a flat plate film cooling efficiency from a single row of inclined holes embedded in a "shallow" trench are presented. It is shown the cooling efficiency of such a configuration is much greater than that of the traditional configuration of inclined round holes. This provides more uniform surface coverage by the coolant film. The flow external turbulence increases the film cooling efficiency by 58%, while the freestream flow acceleration reduces it by 1015%.