Progress toward luminescence-based VAATE turbine blade and vane temperature measurement

T. P. Jenkins, J. I. Eldridge, S. W. Allison, R. H. Niska, J. J. Condevaux, Douglas Edward Wolfe, E. H. Jordan, B. Heeg

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Progress towards fielding luminescence-based temperature measurements for the Versatile Affordable Advanced Turbine Engine (VAATE) program is described. The near term programmatic objective is to monitor turbine vane temperatures and health by luminescence from a rare-earth doped thermal barrier coating (TBC), or from a thermographic phosphor layer coated onto a TBC. The first goal is to establish the temperature measurement capability to 1300°C with 1 percent uncertainty in a test engine. An eventual goal is to address rotating turbine blades in an F135 engine. The project consists of four phases, of which the first two have been completed and are described in this paper. The first phase involved laser heating of a 2.54-cm-diameter test sample, coated with a TBC and a thermographic phosphor layer, to produce a thermal gradient across the TBC layer similar to that expected in a turbine engine. Phosphor temperatures correlated well with those measured by long wavelength pyrometry. In the second phase, 10×10-cm coupons were exposed to a jet fuel flame at a burner rig facility. The thermographic phosphor/TBC combination survived the aggressive flame and high exhaust gas velocity, even though the metal substrate melted. Reliable temperature measurements were made up to about 1400°C using YAG:Dy as the thermographic phosphor. In addition, temperature measurements using YAG:Tm showed very desirable background radiation suppression.

Original languageEnglish (US)
Title of host publicationTemperature
Subtitle of host publicationIts Measurement and Control in Science and Industry - Proceedings of the Ninth International Temperature Symposium
Pages903-908
Number of pages6
Volume1552 8
DOIs
StatePublished - Oct 9 2013
Event9th International Temperature Symposium on Temperature: Its Measurement and Control in Science and Industry, ITS 2012 - Los Angeles, CA, United States
Duration: Mar 19 2012Mar 23 2012

Other

Other9th International Temperature Symposium on Temperature: Its Measurement and Control in Science and Industry, ITS 2012
CountryUnited States
CityLos Angeles, CA
Period3/19/123/23/12

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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