High-resolution fast temperature mapping of a gas turbine combustor simulator with femtosecond infrared laser written fiber Bragg gratings

Robert B. Walker; Sangsig Yun; Huimin Ding; Michel Charbonneau; David Coulas; Nanthan Ramachandran; Stephen J. Mihailov

doi:10.1117/12.2251037

20 February 2017 High-resolution fast temperature mapping of a gas turbine combustor simulator with femtosecond infrared laser written fiber Bragg gratings

Robert B. Walker, Sangsig Yun, Huimin Ding, Michel Charbonneau, David Coulas, Nanthan Ramachandran, Stephen J. Mihailov

Author Affiliations +

Proceedings Volume 10110, Photonic Instrumentation Engineering IV; 101101H (2017) https://doi.org/10.1117/12.2251037
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

Femtosecond infrared (fs-IR) written fiber Bragg gratings (FBGs), have demonstrated great potential for extreme sensing. Such conditions are inherent to the advanced gas turbine engines under development to reduce greenhouse gas emissions; and the ability to measure temperature gradients in these harsh environments is currently limited by the lack of sensors and controls capable of withstanding the high temperature, pressure and corrosive conditions present. This paper discusses fabrication and deployment of several fs-IR written FBG arrays, for monitoring the sidewall and exhaust temperature gradients of a gas turbine combustor simulator. Results include: contour plots of measured temperature gradients contrasted with thermocouple data, discussion of deployment strategies and comments on reliability.

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Robert B. Walker, Sangsig Yun, Huimin Ding, Michel Charbonneau, David Coulas, Nanthan Ramachandran, and Stephen J. Mihailov "High-resolution fast temperature mapping of a gas turbine combustor simulator with femtosecond infrared laser written fiber Bragg gratings", Proc. SPIE 10110, Photonic Instrumentation Engineering IV, 101101H (20 February 2017); https://doi.org/10.1117/12.2251037

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