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← ScienceWhich phenomenon decreases efficiency if turbine blade surface transitions from laminar to turbulent flow?
A)Increased skin friction drag coefficient✓
B)Decreased pressure gradient separation
C)Delayed boundary layer transition point
D)Reduced convective heat transfer rate
💡 Explanation
When laminar flow transitions to turbulent flow, the skin friction drag coefficient increases because turbulent flow has higher momentum transfer and mixing near the wall, leading to greater shear stress. Therefore increased skin friction results, rather than decreased pressure gradient, delayed transition, or reduced heat transfer which require maintaining efficient laminar boundary layers.
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