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Which mechanical failure is initiated in an aircraft wing when the Reynolds number exceeds design tolerances?

A)Boundary layer flow separation
B)Increased skin friction drag
C)Compressibility induced wave drag
D)Decreased structural fatigue life

💡 Explanation

Boundary layer flow separation initiates because increased Reynolds number induces turbulence near the wing surface. This causes an adverse pressure gradient, therefore the airflow detaches, rather than remaining attached, because turbulence decreases the flow's ability to follow the wing's curvature.

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