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Which risk increases when Reynolds number climbs during flight?

A)Reduced aerodynamic lift generation
B)Onset of turbulent boundary layer
C)Decreased skin friction coefficient
D)Laminar flow profile stabilization

💡 Explanation

Increased Reynolds number indicates higher inertial forces relative to viscous forces and promotes the *instability of laminar flow*. Therefore, a turbulent boundary layer appears because inertial forces overwhelm viscous damping, rather than maintaining laminar flow.

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