29 May 2013 Engine test for wavelength-multiplexed fiber Bragg grating temperature sensor
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Abstract
A temperature sensor link based on wavelength-multiplexed fiber Bragg grating (FBG) was designed and fabricated for distributed temperature measurement in a jet engine nozzle under field conditions. Eight FBGs with different Bragg wavelengths ranging from 1520 nm to 1560 nm were fabricated along one single-mode fiber which was packaged inside a stainless steel tube. The reflected signal from the sensor link was simultaneously collected by an optical sensing interrogator and converted into temperature information. The steel tube was embedded in a steel flange assembly attached to a jet engine. Three engine cycles were performed from 55% (idle) to 80% of the engine’s full power to test the sensor response under high temperature, vibration and strong exhaust flow conditions. Test results show good survivability of the sensor, and the temperature around the nozzle was measured up to 290 °C. The system has a temperature measurement range from 20 °C to 600 ° and the response time is less than 1 second.
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Li Yu, Li Yu, Dorothy Y. Wang, Dorothy Y. Wang, Yunmiao Wang, Yunmiao Wang, Christopher M. Collins, Christopher M. Collins, William C. Schneck, William C. Schneck, Justin M. Bailey, Justin M. Bailey, Walter F. O'Brien, Walter F. O'Brien, Anbo Wang, Anbo Wang, } "Engine test for wavelength-multiplexed fiber Bragg grating temperature sensor", Proc. SPIE 8722, Fiber Optic Sensors and Applications X, 872209 (29 May 2013); doi: 10.1117/12.1518451; https://doi.org/10.1117/12.1518451
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