Two-Dimensional Cold-Air Cascade Study of a Film-Cooled Turbine Stator Blade V - Comparison of Experimental and Analytical Aerodynamic Results for Blade With 12 Rows of 0.038-Centimeter-(0.015-in.-) Diameter Coolant Holes Having Stream wise Ejection Angles

摘要

Experimentally determined changes in aerodynamic efficiency for a full-film-cooled stator blade with 32 spanwise rows of coolant holes were compared with predicted efficiency changes based on two published analytical methods. This is the second of two such comparisons. One of the analytical methods was used as published;the other was modified for certain cases of coolant ejection from the blade suction surface.nEfficiency results were compared for 23 cases of coolant discharge, including ejection from each of the 12 single rows and from various combinations of rows as well as full film cooling. The experimental efficiency changes were predicted reasonably well by both methods. For all cases of coolant ejection, covering coolant fractions from 0 to about 9 percent, the difference between experimental and predicted changes was no greater than about 1 percent for either method.