Optical pyrometers provide many advantages over intrusive measuring techniques in determining the spatial and time varying temperature distribution of fast rotating components in gas turbines. This paper describes the development and evaluation of a versatile high-resolution pyrometer system and its application to radial turbine rotor temperature mapping as has been done in a R&D project at the Technical University Berlin under funding from Siemens Power Generation (KWU). The development goal was a pyrometer system with a temporal resolution of 1 μs, a minimum field of view of 1 mm, and a measurement range from 600 to 1500°C. A prototype of the pyrometer system has been built and tested at the small gas turbine test facility of the Technical University Berlin. The system yielded excellent results with respect to measurement uncertainty, resolution, and reliability. Finally, measurement results obtained with the new system on a radial turbine rotor and on a heavy duty industrial gas turbine are compared with measurements conducted with a commercially available turbine pyrometer system.

Issue Section:
Technical Papers
Keywords:
gas turbines, pyrometers, rotational flow, temperature distribution, rotors
Topics:
Gas turbines, Pyrometers, Radiation (Physics), Resolution (Optics), Sensors, Temperature, Turbines, Probes, Design, Temperature distribution, Rotors
1.
Schenk, B., and Raake, D., 1995, “Fast Response Turbine Pyrometry for High Temperature Gas Turbine Applications—Present State of Technology and Future Demand,” Proc. Int. Symp. “Local Strain and Temperature Measurements in Non-Uniform Fields at Elevated Temperatures,” High Temperature Mechanical Testing Committee, Berlin, Germany.
2.
Eggert, T., 2000, “Turbine Pyrometry with High Spatial and Temporal Resolution,” (in German), Ph.D. dissertation, Technical University Berlin (1999), Wissenschaft & Technik Verlag, Berlin, Germany.
3.
De Lucia, M., and Lanfranchi, C., 1992, “An Infrared Pyrometry System for Monitoring Gas Turbine Blades: Development of a Computer Model and Experimental Results,” ASME-Paper No. 92-GT-80.
4.
De Lucia, M., and Masotti, G., 1994, “A Scanning Radiation Thermometry Technique for Determining Temperature Distribution in Gas Turbines,” ASME-Paper No. 94-GT-39.
5.
Frank, S. F. L., Holt, T. O., Eisenlohr, H., and Raake, D., 2001, “Application of a High Resolution Turbine Pyrometer to Heavy Duty Gas Turbines,” presented at 46th ASME Turbo Expo, New Orleans, LA, June 4–7.
6.
Koschel, W., Salden, D., and Hoch, T., 1986, “Turbine Rotor Blade Measurements Using Infrared Pyrometry,” AGARD-CP 399, Philadelphia, PA.
7.
Beynon, T. G. R., 1981, “Turbine Pyrometry—An Equipment Manufacturer’s View,” ASME-Paper No. 81-GT-136.
8.
Kirby, P. J., 1989, “Some Considerations Relating to Aero Engine Pyrometers,” AGARD-CP 399.
9.
Schenk, B., Eggert, T., and Pucher, H., 1998, “A Unique Small Gas Turbine Test Facility for Low-Cost Investigations of Ceramic Rotor Materials and Thermal Barrier Coatings,” ASME-Paper No. 98-GT-554.
Copyright © 2002
 by ASME
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