Investigation of IGV trailing edge blowing in a F109 turbofan engine

2000 ◽  
Author(s):  
Jeffrey Kozak ◽  
Wing Ng
Keyword(s):  
Trailing Edge ◽  
Turbofan Engine

Investigation of HP Turbine Blade Failure in a Military Turbofan Engine

2017 ◽  
Vol 34 (1) ◽  
Author(s):  
R. K. Mishra ◽  
Johny Thomas ◽  
K. Srinivasan ◽  
Vaishakhi Nandi ◽  
R. Raghavendra Bhatt
Keyword(s):  
Turbine Blade ◽  
Substrate Material ◽  
Intergranular Cracking ◽  
Trailing Edge ◽  
Turbofan Engine ◽  
Root Cause ◽  
Final Failure ◽  
Cause Of Failure ◽  
Blade Failure ◽  
Turbine Blade Failure

AbstractFailure of a high pressure (HP) turbine blade in a military turbofan engine is investigated to determine the root cause of failure. Forensic and metallurgical investigations are carried out on the affected blades. The loss of coating and the presence of heavily oxidized intergranular fracture features including substrate material aging and airfoil curling in the trailing edge of a representative blade indicate that the coating is not providing adequate oxidation protection and the blade material substrate is not suitable for the application at hand. Coating spallation followed by substrate oxidation and aging leading to intergranular cracking and localized trailing edge curling is the root cause of the blade failure. The remaining portion of the blade fracture surface showed ductile overload features in the final failure. The damage observed in downstream components is due to secondary effects.

Computation of trailing-edge noise due to turbulent flow over an airfoil

AIAA Journal ◽  
2002 ◽  
Vol 40 ◽  
pp. 2206-2216 ◽  
Author(s):  
A. Oberai ◽  
F. Roknaldin ◽  
T. J. R. Hughes
Keyword(s):  
Turbulent Flow ◽  
Trailing Edge ◽  
Trailing Edge Noise
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