DIFFERENCE BETWEEN IMPULSE AND REACTION TURBINE

Impulse Turbine :

* It consists of nozzles and moving blades.

* Pressure drop occurs only in nozzles not in moving blades.

* Steam strikes the blades with kinetic energy.

* It has constant blade channel area.

* Due to more pressure drop per blade, number of stages required is less.

* Power developed is less.

* It occupies less space for same power output.

* Velocity of Turbine is more.

* Lower efficiency.

* Blade manufacturing is not difficult and Thus it is not costly.

Reaction Turbine :

* It consists of Fixed Blades and moving blades.

* Pressure drop occurs in fixed as well as moving blades.

* Steam passes over the moving blades with pressure and Kinetic energy.

* It has varying blade channels area.

* Number of stages required is more due to more pressure drop.

* Power developed is considerable.

* It occupies more space for same power .

* Velocity of Turbine is less.

* Blade manufacturing process is Difficult.

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