IMPULSE TURBINE :
In Impulse Turbine, the steam at high pressure and temperature with low velocity expands through nozzles where the pressure reduces and velocity increases. This High Velocity jet steam which is obtained from nozzle impinges on the blades fixed on a rotor. The blades change the direction of the steam flow without changing its pressure. This causes change in momentum and the force developed drives the turbine rotor. Here, the nozzles are stationary and fitted in a casing. The examples of Impulse Turbine are De-Laval, Curtis, and Rateau Turbines.
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