Temperature Mapping of Air Film-Cooled Thermal Barrier Coated Surfaces Using Cr-Doped GdAlO3 Phosphor ThermographyIt has been recently shown that the high luminescence intensity from a Cr-doped GdAlO3 (Cr:GdAlO3) thermographic phosphor enables non-rastered full-field temperature mapping of thermal barrier coating (TBC) surfaces to temperatures above 1000C. In this presentation, temperature mapping by Cr:GdAlO3 based phosphor thermometry of air film-cooled TBC-coated surfaces is demonstrated for both scaled-up cooling hole geometries as well as for actual components in a burner rig test environment. The effects of thermal background radiation and flame chemiluminescence on the measurements are investigated, and advantages of this method over infrared thermography as well as the limitations of this method for studying air film cooling are discussed.
Document ID
20160014559
Acquisition Source
Glenn Research Center
Document Type
Presentation
Authors
Eldridge, Jeffrey I. (NASA Glenn Research Center Cleveland, OH United States)
Shyam, Vikram (NASA Glenn Research Center Cleveland, OH United States)
Wroblewski, Adam C. (NASA Glenn Research Center Cleveland, OH United States)
Zhu, Dongming (NASA Glenn Research Center Cleveland, OH United States)
Cuy, Michael D. (Vantage Partners, LLC Brook Park, OH, United States)
Wolfe, Douglas E. (Pennsylvania State Univ. University Park, PA, United States)
Date Acquired
December 9, 2016
Publication Date
January 25, 2016
Subject Category
Fluid Mechanics And ThermodynamicsNonmetallic Materials
Report/Patent Number
GRC-E-DAA-TN29119
Meeting Information
Meeting: International Conference and Expo on Advanced Ceramics and Composites