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← ScienceWhich outcome reduces the efficiency of a turbine engine when internal clearances increase?
A)Decreased energy transfer to blades✓
B)Increased compressor stall margin
C)Lower exhaust gas temperature
D)Improved combustion chamber mixing
💡 Explanation
Increased internal clearances within the turbine result in leakage past the blades, and decreased energy transfer because the working fluid bypasses the power extraction stage via **turbulent diffusion**, which lowers overall turbine output and efficiency. Therefore, less efficient blade performance is more likely rather than alternatives under different leakage constraints.
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