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Proceedings Paper

Sensor for performance monitoring of advanced gas turbines
Author(s): Harri M. Latvakoski; James R. Markham; James A. Harrington; David J. Haan
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Paper Abstract

Advanced thermal coating materials are being developed for use in the combustor section of high performance turbine engines to allow for higher combustion temperatures. To optimize the use of these thermal barrier coatings (TBC), accurate surface temperature measurements are required to understand their response to changes in the combustion environment. Present temperature sensors, which are based on the measurement of emitted radiation, are not well studied for coated turbine blades since their operational wavelengths are not optimized for the radiative properties of the TBC. This work is concerned with developing an instrument to provide accurate, real-time measurements of the temperature of TBC blades in an advanced turbine engine. The instrument will determine the temperature form a measurement of the radiation emitted at the optimum wavelength, where the TBC radiates as a near-blackbody. The operational wavelength minimizes interference from the high temperature and pressure environment. A hollow waveguide is used to transfer the radiation from the engine cavity to a high-speed detector and data acquisition system. A prototype of this system was successfully tested at an atmospheric burner test facility, and an on-engine version is undergoing testing for installation on a high-pressure rig.

Paper Details

Date Published: 22 January 1999
PDF: 9 pages
Proc. SPIE 3535, Advanced Sensors and Monitors for Process Industries and the Environment, (22 January 1999); doi: 10.1117/12.337457
Show Author Affiliations
Harri M. Latvakoski, Advanced Fuel Research, Inc. (United States)
James R. Markham, Advanced Fuel Research, Inc. (United States)
James A. Harrington, Rutgers Univ. (United States)
David J. Haan, Rutgers Univ. (United States)

Published in SPIE Proceedings Vol. 3535:
Advanced Sensors and Monitors for Process Industries and the Environment
Wim A. de Groot, Editor(s)

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