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Real-Time Thermographic-Phosphor-Based Temperature Measurements of Thermal Barrier Coating Surfaces Subjected to a High-Velocity Combustor Burner EnvironmentSurface temperature measurements were conducted on metallic specimens coated with an yttria-stabilized zirconia (YSZ) thermal barrier coating (TBC) with a YAG:Dy phosphor layer that were subjected to an aggressive high-velocity combustor burner environment. Luminescence-based surface temperature measurements of the same TBC system have previously been demonstrated for specimens subjected to static furnace or laser heating. Surface temperatures were determined from the decay time of the luminescence signal of the YAG:Dy phosphor layer that was excited by a pulsed laser source. However, the furnace and laser heating provides a much more benign environment than that which exists in a turbine engine, where there are additional challenges of a highly radiant background and high velocity gases. As the next step in validating the suitability of luminescence-based temperature measurements for turbine engine environments, new testing was performed where heating was provided by a high-velocity combustor burner rig at Williams International. Real-time surface temperature measurements during burner rig heating were obtained from the decay of the luminescence from the YAG:Dy surface layer. The robustness of several temperature probe designs in the sonic velocity, high radiance flame environment was evaluated. In addition, analysis was performed to show whether the luminescence decay could be satisfactorily extracted from the high radiance background.
Document ID
Document Type
Eldridge, Jeffrey I.
(NASA Glenn Research Center Cleveland, OH, United States)
Jenkins, Thomas P.
(MetroLaser Irvine, CA, United States)
Allison, Stephen W.
(Oak Ridge National Lab. TN, United States)
Cruzen, Scott
(Williams International Walled Lake, MI, United States)
Condevaux, J. J.
(Williams International Walled Lake, MI, United States)
Senk, J. R.
(Williams International Walled Lake, MI, United States)
Paul, A. D.
(Williams International Walled Lake, MI, United States)
Date Acquired
June 10, 2015
Publication Date
June 20, 2011
Subject Category
Instrumentation And Photography
Mechanical Engineering
Spacecraft Propulsion And Power
Ground Support Systems And Facilities (Space)
Report/Patent Number
Meeting Information
International Instrumentation Symposium (IIS)(St. Louis, MO)
Funding Number(s)
WBS: WBS 031102.02.03.0820.11
Distribution Limits
Public Use Permitted.
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