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Thermodynamics Miscellaneous
  1. For a single stage impulse turbine with rotor diameter of 2 m and a speed of 3000 rpm when the nozzle angle is 20°, the optimum velocity of steam in m/s is
    1. 334
    2. 356
    3. 668
    4. 711
Correct Option: C

u
 =
cosα
v12

v1 =
2v
cosα

=
2 × (πDN/60)
 =
π × 3000
cosα30 × cos20

[v1 = 668.6 m/s]


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