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← ScienceWhich mechanism determines steam turbine blade erosion number?
A)Incomplete combustion creates highly abrasive soot
B)Cavitation implosions cause localized stress concentrations
C)Water droplet impact above fatigue endurance limit✓
D)Oxidation weakens boundary layer metal integrity
💡 Explanation
Water droplet impact erodes turbine blades because repeated stress exceeds fatigue endurance limit, therefore fractures propagate, rather than material loss to oxidation, because oxidation requires continuous high temperature oxidation protection.
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