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Which mechanism increases drag when airfoil airspeed increases above a critical Reynolds number?

A)Laminar flow boundary layer separation
B)Increased static pressure recovery
C)Reduced adverse pressure gradients
D)Enhanced streamlining effectiveness ratio

💡 Explanation

Laminar flow separation occurs because the flow transitions to turbulent beyond the critical Reynolds number, therefore lift decreases and drag increases, rather than pressure recovery which would maintain lift in ideal conditions.

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