A Fiber Optic Probe for Gas Total Temperature Measurement in Turbomachinery

[+] Author and Article Information
S. R. Kidd, J. S. Barton, P. Meredith, J. D. C. Jones

Department of Physics, Heriot-Watt University, Edinburgh, United Kingdom

M. A. Cherrett, K. S. Chana

Defense Research Agency, Pyestock, Farnborough, United Kingdom

J. Turbomach 117(4), 635-641 (Oct 01, 1995) (7 pages) doi:10.1115/1.2836582 History: Received February 04, 1994; Online January 29, 2008


This paper describes the design, operation, construction, and demonstration of a new type of high-bandwidth unsteady temperature sensor based on fiber optics, and capable of operating in a high-speed multistage research compressor with flow representative of jet engine conditions. The sensing element is an optical coating of zinc selenide deposited on the end of an optical fiber. During evaluation in aerodynamic testing, a 1 K gas temperature resolution was demonstrated at 9.6 kHz and an upper bandwidth limit of 36 kHz achieved.

Copyright © 1995 by The American Society of Mechanical Engineers
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