In this study, an assessment of degradation and failure modes in the gas-path components
of twin-shaft industrial gas turbines (IGTs) has been carried out through a model-based
analysis. Measurements from twin-shaft IGTs operated in the field and denoting reduction in
engine performance attributed to compressor fouling conditions, hot-end blade turbine
damage, and failure in the variable stator guide vane (VSGV) mechanism of the compressor
have been considered for the analysis. The measurements were compared with simulated …