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

Volume

13

Issue

7

fYear

1995

fDate

7/1/1995 12:00:00 AM

Firstpage

1335

Lastpage

1339

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;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.400679

Filename

400679