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← ScienceWhich efficiency loss occurs when a turbojet engine's turbine overheats?
A)Decreased Compressor pressure ratio
B)Increased fuel-air mixture
C)Reduced turbine blade effectiveness✓
D)Elevation of isentropic efficiency
💡 Explanation
Creep deformation occurs in the high temperature turbine because sustained stress causes dislocations to migrate during dislocation climb. Therefore, the blades lose their original aerodynamic profile rather than maintaining optimal shape, resulting in reduced effectiveness impacting overall turbine performance.
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