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Which mechanism limits aerodynamic performance when Reynolds number increases excessively close?

A)Transition to turbulent boundary layer
B)Increased skin friction coefficient
C)Onset of laminar flow instability
D)Reduced pressure gradient efficiency

💡 Explanation

Transition to a turbulent boundary layer occurs because, at high Reynolds numbers, inertial forces dominate viscosity, therefore, the boundary layer transitions from laminar to turbulent, rather than remaining stable which delays separation but increases drag.

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