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Communication Dans Un Congrès Année : 2022

Fiber Bragg Grating temperature monitoring of helicopter engine mechanical parts on an engine test bench

Résumé

Next generation aircraft or helicopter engine monitoring requires a number of different sensors including temperature, strain or pressure sensing. Fiber Bragg Grating (FBG) technology is of particular interest for this application since it provides high multiplexing capability, low intrusiveness due to the small size, immunity to electro-magnetic interference as well as resistance to harsh environments. In this paper, FBG-temperature monitoring results of two mechanical parts in the exhaust system of a helicopter engine test bench are presented. Fabrication of FBG lines and fiber integration on those two mechanical parts are first presented. After a description of the setup and of the optoelectronic interrogation units used, measurement results as high as 600°C are exposed and compared to standard temperature measurements using thermocouple (TC) technology as well as infrared images. Average temperature gradients along vertical and horizontal directions of the first mechanical part are calculated and a short-time Fourier transform of a FBG signal acquired at 5 kHz is performed and described as well.
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Dates et versions

cea-04559047 , version 1 (25-04-2024)

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Jean-Baptiste Quelene, Nassim Salhi, Rudy Desmarchelier, Minh-Chau Phan Huy, Romain Cotillard, et al.. Fiber Bragg Grating temperature monitoring of helicopter engine mechanical parts on an engine test bench. 27th International Conference on Optical Fiber Sensors, Aug 2022, Alexandria, United States. paper W4.16, ⟨10.1364/OFS.2022.W4.16⟩. ⟨cea-04559047⟩
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