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← ScienceWhich mechanism causes decreased efficiency in a turbine due to inter-stage leaks?
A)Adiabatic expansion's reduced pressure ratio
B)Fluid's increased kinetic turbulent energy
C)Isentropic efficiency degradation with turbulence
D)Mixing causing flow momentum reductions✓
💡 Explanation
Leakage flow mixes with the main flow causes momentum reduction; the dominant mechanism is mixing. Mixing reduces directed kinetic energy, because random motions increase. Therefore, less useful shaft power is delivered, rather than lower isentropic efficiency or expansion ratio.
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