Remote high-temperature thermometry of rotating test blades using YVO/sub 4/:Eu and Y/sub 2/O/sub 3/:Eu thermographic phosphors
Remote temperature sensing using thermal phosphors is being developed as a nonintrusive technique for monitoring and analyzing the high-temperature, highly corrosive environments of turbomachinery. Proof-of-principle tests were conducted on phosphor-coated turbine blades which were rotating at low speeds and were immersed in a jet fuel flame. A pulsed nitrogen laser produced fluorescence from the applied phosphor. A simple optical scheme collected this emission, and a digital oscilloscope extracted from the signal the temperature-dependent decay rate. Measured temperatures ranged from 700-1000/degree/C. These were comparable with values indicated by a pyrometer. Time-dependent temperature measurements demonstrated the transient capabilities of the thermophosphor technique. This is only the second time the phosphor technique has been implemented in a flame environment. The previous work involved a water-cooled object near 150/degree/C. The current test was at a much higher temperature and incorporated a rotating object as well. The data provide important information for designing a thermophosphor system for future real-engine testing. 8 refs., 9 figs., 2 tabs.
- Research Organization:
- Oak Ridge National Lab., TN (USA); Pratt and Whitney Aircraft, East Hartford, CT (USA)
- DOE Contract Number:
- AC05-84OT21400; AC05-84OR21400
- OSTI ID:
- 6955284
- Report Number(s):
- K/ETAC-52; CONF-880764-2; ON: DE88013111
- Resource Relation:
- Conference: 24. AIAA/ASME/SAE/ASEE joint propulsion conference, Boston, MA, USA, 11 Jul 1988; Other Information: Paper copy only, copy does not permit microfiche production
- Country of Publication:
- United States
- Language:
- English
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