Steam Boilers, Engines, Nozzles and Turbines

The efficiency of an impulse turbine is maximum when (where Vb = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle)

  • A. Vb = 0.5 V cosα
  • B. Vb = V cosα
  • C. Vb = 0.5 V² cosα
  • D. Vb = V² cosα
Answer: Option A.

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