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← ScienceWhich mechanism causes stall in an airfoil when exceeding critical Reynolds number?
A)Adverse pressure gradient amplification✓
B)Increased laminar boundary layer thickness
C)Reduced skin friction coefficient trends
D)Enhanced momentum within sheer flows
💡 Explanation
An adverse pressure gradient separates the boundary layer, fostering turbulence and stall because the Reynolds number dictates turbulence characteristics. The flow transitions from laminar rather than remaining attached. Therefore, pressure gradients, not increased laminar flow thickness, trigger stall.
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