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Instrument for temperature and condition monitoring of advanced turbine blades

United States Patent Application

View the Complete Application at the US Patent & Trademark Office
An on-engine radiation thermometer that simultaneously measures, through a common optical waveguide probe, long wavelength infrared radiation and short wavelength radiation, enables accurate temperature measurement and condition monitoring of ceramic thermal barrier coatings used on metal blades of gas turbine engines. This in turn enables operation at higher combustion temperatures, thereby optimizing coating use, and provides warning signals that are indicative of potential blade failure due to barrier coating spall and other conditions.
Markham, James R. (Middlefield, CT)
10/ 755,424
January 12, 2004
[0002] The United States Government has rights in this invention under Department of Energy Contract No. DE-FG02-01ER83138.