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← ScienceWhich mechanism causes increased drag on an aircraft wing as airspeed dramatically increases?
A)Transition to turbulent boundary layer✓
B)Increased skin friction coefficient
C)Decreased adverse pressure gradient
D)Stagnation point migration aft
💡 Explanation
The turbulent boundary layer increases drag because the Reynolds number exceeds the critical value, triggering boundary layer transition to unstable turbulent flow thereby enhancing momentum transfer that increases shearing forces. Therefore the increased drag dominates, rather than decreased skin friction.
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