Evaluating and testing thermographic phosphors for turbine-engine temperature measurements

Conference · Thu Jan 01 00:00:00 EST 1987

DOI:https://doi.org/10.2514/6.1987-1761· OSTI ID:6232996

Noel, B W; Allison, S W; Beshears, D L; Cates, M R; Borella, H M; Franks, L A; Iverson, C E; Dowell, L J; Gillies, G T; Lutz, W N

A technique developed earlier for measuring the temperature of inaccessible surfaces in low-temperature rotating machines is being adapted to measure the temperature of surfaces at the higher temperatures and in the erosive environment inside operating turbine engines. The method uses the temperature dependence of the characteristic decay time of the laser-induced-fluorescence of thermographic phosphors to measure the temperature. This paper summarizes recent work in four areas: phosphor characterization and calibration, instrumentation development, bonding, and field tests. By using improved instrumentation and data-analysis techniques, calibration curves for several phosphors are measured with greater accuracy and extended to higher temperatures than before. Phosphors are evaluated that were attached to sample surfaces by high-temperature bonding materials, electron-beam deposition, flame spraying, and plasma spraying. A burner rig test was performed on some phosphor-coated samples and the instrumentation required for an upcoming spin-pit test was designed, built, and calibrated.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Oak Ridge Gaseous Diffusion Plant (K-25), Oak Ridge, TN (United States); EG and G Energy Measurements, Inc., Las Vegas, NV (USA); Univ. of Virginia, Charlottesville, VA (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6232996
• Report Number(s): LA-UR-87-2017; CONF-8706157-1; ON: DE87011772
• Resource Relation: Conference: 23. AIAA/SAE/ASME/ASEE joint propulsion conference, San Diego, CA, USA, 29 Jun 1987; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
47 OTHER INSTRUMENTATION
GAS TURBINE ENGINES
TEMPERATURE MEASUREMENT
VERY HIGH TEMPERATURE
DATA ACQUISITION SYSTEMS
EXPERIMENTAL DATA
FLUORESCENCE
PHOSPHORS
ULTRAVIOLET RADIATION
DATA
ELECTROMAGNETIC RADIATION
ENGINES
HEAT ENGINES
INFORMATION
INTERNAL COMBUSTION ENGINES
LUMINESCENCE
NUMERICAL DATA
RADIATIONS
330103* - Internal Combustion Engines- Turbine
440300 - Miscellaneous Instruments- (-1989)