Model based approach and algorithm for fault diagnosis and prognosis of coated gas turbine blades

Model based approach for damage fault diagnostic solution and life prognostic methodology is addressed in the paper. A life cycle management model and a working algorithm for coated hot section gas turbine blades are presented. Physics based modeling is developed with experimental thermally grown oxide damage data, while the fracture mechanics model is developed analytically for three layer thermal barrier coated system assuming isostrain condition. Modeling and algorithm issues as discussed here constitute the backbone of any fault diagnostic and prognostic system which, in turn, facilitates designing and developing smart and critical structural systems.