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← ScienceWhich risk increases during high jet engine thrust?
A)Turbine blade fatigue cracking✓
B)Compressor stage flow recirculation
C)Fuel injector nozzle clogging
D)Lubrication system oil foaming
💡 Explanation
Turbine blade fatigue cracking is caused by increased turbulence. As thrust increases, the flow transitions to turbulence, increasing high-cycle fatigue blade stress because resonant frequencies are excited, therefore leading to blade cracks, rather than other failure modes resulting in different flight parameters.
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