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← ScienceWhich outcome impairs a turbine engine using supercritical fluids?
A)Reduced density changes efficiency✓
B)Increased cavitation causes blade erosion
C)Decreased thermal shock lowers stress
D)Elevated viscosity improves fluid coupling
💡 Explanation
Reduced density leads to inefficient energy extraction via decreased mechanical work, because, with constant volume, lower density results in diminished momentum transfer during the Rankine cycle. Therefore, the outcome is efficiency reduction, rather than the alternatives because density specifically affects kinetic energy transfer.
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