Physics · Thermal Engineering

The impulse turbine rotor efficiency will have a maximum value of cos 2 α (or 0.5 cos 2 α depending on stage definition), where α is the nozzle exit flow angle, if the:

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Blades are equiangular and frictionless

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The impulse turbine rotor efficiency will have a maximum value of cos 2 &alpha; (or 0.5 cos 2 &alpha; depending on stage definition), where &alpha; is the nozzle exit flow angle, if the: