Mechanical Engineering :: Steam Nozzles and Turbines
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A single stage impulse turbine with a diameter of 1.2 m runs at 3000 r.p.m. If the blade speed ratio is 0.42, then the inlet velocity of steam will be
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The flow of steam is super-sonic
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For maximum efficiency of an impulse turbine, the steam should leave the blades at right angles to their motion.
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De-Laval turbine is a
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The impulse turbine rotor efficiency will have a maximum value of 0.5 cos2 α, where α is the nozzle exit flow angle, if theblades are equiangular
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When the cross-section of a nozzle increases continuously from entrance to exit, it is called a
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Rateau turbine is
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The ratio of the work delivered at the turbine shaft to the heat supplied is called overall thermal efficiency of turbine.
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