Applications of the vector fitting method in monitoring blade faults of gas turbines

To reduce the occurrence of any faults in gas turbine systems is regarded as the precondition for realizing safe operation of gas turbines. Turbine blades are important parts and components in gas turbines and also one of parts operating in a stern environment. Any faults of the turbine blades usually reflect in changes of temperature. The distribution of temperature signals on the blades of a gas turbine was studied with an emphasis being placed on the characteristics of the temperature signals and the data being properly processed. By adopting the vector fitting method, a temperature data equation for blades in various operating environments was obtained, thus achieving an objective to detect any faults and offering a basis for an on-line detection of any faults in blades of gas turbines.