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Which consequence results when blade tip speed increases severely in shrouded turbines?

A)Increased flow-induced periodic vibration
B)Laminar boundary layer re-establishment
C)Optimized turbine stage efficiency
D)Decreased energy loss from friction

💡 Explanation

The rotating blades generate considerable turbulence; therefore, there is increased flow-induced vibration during high turbulence due to vortex shedding behind stalled blades rather than efficient steady-state operation, because viscous losses dominate flow oscillations at small scales.

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