Title :
Demonstration of optical fiber probes for high bandwidth thermal measurements in turbomachinery
Author :
Kidd, Stephen R. ; Barton, James S. ; Jones, Julian D C
Author_Institution :
Dept. of Phys., Heriot-Watt Univ., Edinburgh, UK
fDate :
7/1/1995 12:00:00 AM
Abstract :
Interferometric temperature sensors comprising a zinc selenide film on the end of a single-mode optical fiber have been incorporated into rugged probes for measurement of gas temperature fluctuations in aerospace turbomachinery test rigs. Two-wavelength illumination provides signals in quadrature for determination of optical phase change of the signal reflected from the film which is exposed to the gas flow. We present ensemble-averaged results showing 15 K amplitude gas temperature fluctuations up to 70 kHz with a resolution of 1 K
Keywords :
II-VI semiconductors; aerospace propulsion; aerospace test facilities; aerospace testing; aircraft; calibration; fibre optic sensors; gas turbines; light interferometry; temperature sensors; zinc compounds; 15 K; 70 kHz; ZnSe; ZnSe film; aerospace turbomachinery test rigs; amplitude gas temperature fluctuations; calibration; data analysis; ensemble-averaged results; gas flow; high bandwidth thermal measurement; interferometric temperature sensors; optical fiber probes; optical phase change; rugged probes; single-mode optical fiber; test rig; turbomachinery; two-wavelength illumination; Aerospace testing; Bandwidth; Fluctuations; Optical fibers; Optical films; Optical interferometry; Probes; Temperature measurement; Temperature sensors; Zinc compounds;
Journal_Title :
Lightwave Technology, Journal of
