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Which risk increases when an aircraft wing's boundary layer transitions beyond laminar flow?

A)Reduced lift coefficient at stall
B)Increased skin friction drag force
C)Elevated static pressure recovery
D)Decreased adverse pressure gradient

💡 Explanation

Increased skin friction drag occurs due to turbulent boundary layer formation via the Reynolds number increasing, therefore more energy is dissipated as heat, because increased mixing and momentum transfer happen, because of increased viscosity rather than ideal flow predicted by Bernoulli alone.

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