An Experimental Investigation Studying the Influence of Dimples on a Film Cooled Turbine Blade Leading Edge
Paul G. Frisinger
Broschiertes Buch

An Experimental Investigation Studying the Influence of Dimples on a Film Cooled Turbine Blade Leading Edge

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An investigation was conducted to examine the effect of a row of cylindrical surface dimples in reducing the heat load on a turbine blade leading edge model. The models consisted of a foam cylindrical leading edge with a flat afterbody fabricated from Plexiglass. A single coolant hole was located 21.5- from the leading edge, angled 20- to the surface and 90- from the streamwise direction. The leading edge diameter to hole diameter ratio was D/d = 18.7. A row of seven dimples was placed upstream of one of the coolant holes. Infrared thermography techniques were used to determine the adiabatic e...