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← ScienceWhich consequence results when the impeller's rotational speed increases beyond design in a centrifugal pump operating as an engine?
A)Cavitation erosion rapidly damages surfaces.✓
B)The system enters hydrodynamic lubrication.
C)A thicker boundary layer becomes dominant.
D)Viscosity's effects proportionally decrease largely.
💡 Explanation
Cavitation erosion emerges because elevated impeller speeds intensely reduce local pressure causing the vaporisation of the fluid; therefore, vapour bubbles accelerate leading collapsing and material damage, rather than hydrodynamic lubrication.
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