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← ScienceWhich 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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