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Proceedings Paper

Epoxy-free high-temperature fiber optic pressure sensors for gas turbine engine applications
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Paper Abstract

Pressure measurements at various locations of a gas turbine engine are highly desirable to improve the operational performance and reliability. However, measurement of dynamic pressure (1psi (6.9kPa) variation superimposed on the static bias) in the operating environment of the engine, where temperatures might exceed 600°C and pressures might exceed 100psi (690kPa), is a great challenge to currently available sensors. To meet these requirements, a novel type of fiber optic engine pressure sensor has been developed. This pressure sensor functions as a diaphragm-based extrinsic Fabry-Perot interferometric (EFPI) sensor. The structure of the sensor head, composed entirely of fused silica, allows a much higher operating temperature to be achieved in conjunction with a low temperature dependence. The sensor head and the fiber tail have been packaged in a metal fitting connected to a piece of metal extension tubing, which improves the mechanical strength of the sensor and facilitates easy sensor installation. The sensor exhibited very good performance in an engine field test, demonstrating not only that the sensors' package is robust enough for engine operation, but also that its performance is consistent with that of a commercial Kulite sensor.

Paper Details

Date Published: 8 December 2004
PDF: 10 pages
Proc. SPIE 5590, Sensors for Harsh Environments, (8 December 2004); doi: 10.1117/12.570137
Show Author Affiliations
Juncheng Xu, Virginia Polytechnic Institute and State Univ. (United States)
Gary Pickrell, Virginia Polytechnic Institute and State Univ. (United States)
Bing Yu, Virginia Polytechnic Institute and State Univ. (United States)
Ming Han, Virginia Polytechnic Institute and State Univ. (United States)
Yizheng Zhu, Virginia Polytechnic Institute and State Univ. (United States)
Xingwei Wang, Virginia Polytechnic Institute and State Univ. (United States)
Kristie L. Cooper, Virginia Polytechnic Institute and State Univ. (United States)
Anbo Wang, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 5590:
Sensors for Harsh Environments
Anbo Wang, Editor(s)

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