Gas turbine operation control is normally based on thermocouple-measured exhaust temperatures. Due to radiation shielding and bulky package, it is difficult to provide high spatial resolution for measuring can-to-can combustion temperature profile at the exhaust duct. This paper has demonstrated that wavelength-division-multiplexing-based fiber Bragg grating sensors could provide high spatial resolution steady and dynamic temperature measurements.
Key Features
High spatial resolution for can-to-can combustion temperature profiling
WDM-based multiplexing allows many sensors on a single fiber
Compact and lightweight, overcoming bulky thermocouple packages
Immune to electromagnetic interference (EMI)
Capable of fast dynamic response to temperature transients
High accuracy and repeatability over wide temperature ranges
Reduced wiring complexity compared to multiple thermocouples
Suitable for harsh, high-temperature turbine environments
Applications
Gas turbine exhaust temperature monitoring
Can-to-can combustion temperature profiling
Turbine performance optimization and control
Combustion stability and efficiency analysis
Condition monitoring and predictive maintenance
Power generation turbines (gas and combined cycle)
Research and development testing of combustion systems