National Research Council of Canada. Security and Disruptive Technologies
National Research Council of Canada. Aerospace
25th Optical Fiber Sensors Conference (OFS) 2017, 24-28 April 2017, Jeju, South Korea
femtosecond FBG; ultrafast FBG; high temperature FBG; fiber Bragg grating; temperature sensor array; gas turbine combustor simulator; exhaust temperature mapping; thermocouples
Femtosecond infrared (fs-IR) laser written fiber Bragg gratings (FBGs), have demonstrated great potential for extreme sensing. Such conditions are inherent in 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 exhaust temperature gradients of a gas turbine combustor simulator. Results include: contour plots of measured temperature gradients, contrast with thermocouple data.
25th International Conference on Optical Fiber Sensors 24-28 April 2017, Jeju, Republic of Korea: 102338O-1–102338O-4.