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← ScienceWhich downstream impact results when blade tip vortices become extreme?
A)Increased aerodynamic lift efficiency
B)Cavitation damage on blade surface
C)Decreased structural fatigue lifetime✓
D)Improved energy extraction efficiency
💡 Explanation
Increased turbulence intensity causes decreased structural fatigue, because vortex shedding induces oscillating pressures, rather than a smoothly distributed load. Therefore, fatigue lifetime is reduced rather than lift increasing or cavitation, which would occur with vapor bubbles collapsing.
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