A type of fiber thermocouple is applied to a brush seal in order to obtain the temperature of the bristle-rotor friction zone. Using a brush seal test rig, the temperature measurements utilizing a fiber thermocouple, infrared thermometer, and common thermocouple are compared and studied. The fiber thermocouple is studied under various operational conditions consisting of different pressure and speed variations, rotor-bristle interferences, and eccentricities. Some interesting phenomena and characteristics of brush seals are revealed during these experiments. Some preliminary wear results of a fiber thermocouple are also presented. The results demonstrate the superiority of fiber thermocouples when used in narrow spaces, high temperature, and pressure environments within the heart of an aero-engine.
Experimental Investigation on Fiber Thermocouples Used in Brush Seals for Temperature Measurements
Contributed by the Controls, Diagnostics and Instrumentation Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received February 25, 2014; final manuscript received March 1, 2014; published online April 18, 2014. Editor: David Wisler.
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Huang, S., Suo, S., Li, Y., Ding, J., and Wang, Y. (April 18, 2014). "Experimental Investigation on Fiber Thermocouples Used in Brush Seals for Temperature Measurements." ASME. J. Eng. Gas Turbines Power. September 2014; 136(9): 091602. https://doi.org/10.1115/1.4027069
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