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Jet Engine Exhaust
Turbine BladeS

Finite element analysis

Jet engine turbine blades are very complex and intricate parts that are subject to extreme temperature and vibration excitement changes. Any distortion or growth of the material can adversely affect the functionality of the turbine blade and distortion control is critical of the material. Exhaust turbine blades are often additionally cooled by air passages that pass through the center of the blade.
Should a material property be inconsistent with the manufacturers specifications the performance of the turbine blade may not perform correctly and adversely affect the performance of the engine or cause premature life of the materials.

 

 

 

Blade image taken with a 3D Non-Contact Profilometer using white light axial chromatism.

 

Initial 3D Profilometer Data

 



Test Proccess NDT
3D Profilometer Data


 

 


 

Turbine Blade Finite Element Analysis Cross Section

When a turbine blade is manufactured the exterior surface of the blade material cools at a faster rate than the inner core material and can cause a variance in material stress components of not carefully controlled in heat treating. Similar situations can also apply when air cooling is subjected through orifices during engine operation. The combination of these two stress components can adversely affect the performance and life-time fatigue of the material. Using Cryogenic NDT testing can improve or mitigate the variances in stress component change and allow for extended fatigue life.

 

 

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