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Difference between impulse turbine and reaction turbine?

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Comparison between Impulse turbine and a reaction turbine:

Following are the some points of comparison between an impulse and reaction turbine.

Impulse Turbines:

  • In impulse turbine steam flows through nozzle and impinges in moving blades.
  • The steam hits on the buckets with Kinetic energy.
  • The steam pressure remains constant.
  • Their relative velocity remains constant.
  • Blades are symmetrical.
  • Number of stages required are less for the same power developed.

Reaction turbines:

  • Steam flows initially from guide mechanism and then from moving blades.
  • Steam glides over moving blades.
  • Steam pressure is reduced during its flow.
  • Relative velocity is increased.
  • Blades are not symmetrical.
  • Number of stages required are more for the same power developed.

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