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← ScienceWhich efficiency decrease occurs with turbine blade scaling?
A)Decreased cooling surface area
B)Increased boundary layer thickness✓
C)Reduced stator blade curvature
D)Elevated rotor disc temperatures
💡 Explanation
As turbine blades increase drastically in scale, the relative boundary layer thickness increases due to skin friction effects; therefore, momentum transfer gets disrupted more significantly, adding extra losses, rather than other geometric effects becoming dominant.
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