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Transient Flat Plate

Transient flat plate experiments are conducted in the Small Calibration Facility to explore new experimental techniques in a simpler environment before testing them in the Turbine Test Facility.

A cooled plate instrumented with double-sided Kapton heat-flux gauges.
 
Recent experimental and computational programs have examined the influence of film cooling for a hole pattern representative of the pressure surface of a high-pressure turbine blade.  In addition for providing new insight into the interactions among multiple rows of cooling holes, this experiment also helped validate a new method of injecting cooling streams into a transient facility that validate a new method of injecting cooling streams into a transient facility that has since been applied in the TTF.
Time accurate measurements of film cooling effectiveness obtained with PSP technique. (Click for animation) Experimental method development has recently included film cooling effectiveness measurements using a time accurate, temperature compensated pressure sensitive paint (PSP) technique. PSP provides a full coverage method and can be used to suppliment heat flux guage measurements with both time accurate jet location and jet behavior characteristics.