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Which outcome occurs when a subsonic flow regime transitions past Reynolds number threshold in an airfoil venturi?

A)Turbulent boundary layer drag increases sharply
B)Lift coefficient elevates proportionally and linearly
C)Potential flow model's accuracy rises
D)Static pressure distribution stays uniform

💡 Explanation

Turbulent flow past Reynolds number causes increased drag, because flow separation induces a larger pressure differential; therefore aerodynamic performance decreases rather than increases since laminar flow no longer effectively clings to venturi surfaces.

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