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Which 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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