An experimental investigation of luminescence lifetime thermometry for high temperature engine components using coatings of YAG:DY AND YAG:TM

T. P. Jenkins, J. I. Eldridge, S. W. Allison, R. P. Howard, E. H. Jordan, Douglas Edward Wolfe

Research output: Contribution to conferencePaper

2 Scopus citations

Abstract

Experiments were conducted to evaluate the performance of a thermographic phosphor thermometry system for measuring temperatures of engine hot section components, such as turbine blades and vanes. Two vanes, one coated with YAG:Dy and the other with YAG:Tm, both applied on top of a thermal barrier coating (TBC), were tested. Measurements of laser-induced luminescence lifetime were obtained from both vanes at room temperature, and from the YAG:Dy vane supported in the exhaust of an afterburning turbine engine. The measured luminescence lifetime was found to vary in a systematic way with signal level for both phosphor coatings. This behavior was attributed to saturation effects of the detector. Estimated temperatures of the YAG:Dy-coated vane at afterburning conditions were in the neighborhood of 1250 °C. Signal levels were found to be sufficient to enable a precision of 6 °C at 1050 °C, extrapolated to 3 °C at 1250 °C. Background levels at full afterburner were significant, but manageable using narrowband spectral filtering of the collected luminescence. These findings indicate that a thermometry system for engine components at high temperatures is feasible using at least one, and possibly either, of these coatings.

Original languageEnglish (US)
StatePublished - Sep 25 2013
EventJoint Conference on 67th Machinery Failure Prevention Technology, MFPT 2013 and 59th International Society of Automation, ISA 2013 - Cleveland, OH, United States
Duration: May 13 2013May 17 2013

Other

OtherJoint Conference on 67th Machinery Failure Prevention Technology, MFPT 2013 and 59th International Society of Automation, ISA 2013
CountryUnited States
CityCleveland, OH
Period5/13/135/17/13

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Safety, Risk, Reliability and Quality

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    Jenkins, T. P., Eldridge, J. I., Allison, S. W., Howard, R. P., Jordan, E. H., & Wolfe, D. E. (2013). An experimental investigation of luminescence lifetime thermometry for high temperature engine components using coatings of YAG:DY AND YAG:TM. Paper presented at Joint Conference on 67th Machinery Failure Prevention Technology, MFPT 2013 and 59th International Society of Automation, ISA 2013, Cleveland, OH, United States.