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Which outcome occurs closer to an aircraft wing surface when airspeed nears critical turbulence?

A)Boundary layer separation increases drastically
B)Laminar flow becomes proportionately thicker
C)Pressure gradient remains consistently negative
D)Skin friction drag decreases insignificantly

💡 Explanation

Boundary layer separation increases greatly with increasing turbulence due to adverse pressure gradients induced by flow instability. Increased surface roughness then intensifies the unstable flow; Therefore, boundary layer separation increases rather than remaining stable because energy dissipates quickly in the turbulent boundary layer.

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