Failure Analysis of HP Turbine Blades in a Low Bypass Turbofan Engine

摘要

Failure of high pressure (HP) turbine blades in a low bypass turbofan engine is analyzed to determine its root cause. Forensic and metallurgical investigations are carried out on all the failed blades as well as the failed components of the downstream modules. Fatigue failure of one HP turbine blade at dovetail region is found to be the primary failure. This failure has caused extensive damages in high- and low-pressure turbine modules. Remedial measures are also suggested to prevent such failures.