Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Engineering
Pulsed Film Cooling On A Turbine Blade Leading Edge, James L. Rutledge
Pulsed Film Cooling On A Turbine Blade Leading Edge, James L. Rutledge
Theses and Dissertations
Unsteadiness in gas turbine film cooling jets may arise due to inherent unsteadiness of the flow through an engine or may be induced as a means of flow control. The traditional technique used to evaluate the performance of a steady film cooling scheme is demonstrated to be insufficient for use with unsteady film cooling and is modified to account for the cross coupling of the time dependent adiabatic effectiveness and heat transfer coefficient. The addition of a single term to the traditional steady form of the net heat flux reduction equation with time averaged quantities accounts for the unsteady effects. …
An Experimental Investigation Studying The Influence Of Dimples On A Film Cooled Turbine Blade Leading Edge, Paul G. Frisinger
An Experimental Investigation Studying The Influence Of Dimples On A Film Cooled Turbine Blade Leading Edge, Paul G. Frisinger
Theses and Dissertations
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 degree from the leading edge, angled 20 degree to the surface and 90 degree 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 …