Difference between Impulse Turbine and Reaction Turbine:

The Difference between Impulse Turbine and Reaction Turbine is given below:

SL no Impulse Turbine Reaction Turbine
1 The total available energy of the water is converted into kinetic energy before it strikes the runner. Only a part of the available energy is converted into kinetic energy.
2 The water flows through the nozzle and strikes the runner buckets. The water is guided by the guide blades and flow over the moving lades.
3 The water strikes the runner buckets with kinetic energy. The water glides over the runner blades with pressure energy.
4 The pressure of the flowing water after striking the buckets remains constant. The pressure of water reduces gradually when it flows through the runner.
5 It is not necessary that the wheel should run full. There should be free access of air between the blades and wheel. It is essential that the wheel should always run full i.e., it is kept full of water.
6 Water is admitted over a part of the circumference of the wheel. Water is admitted over the entire circumference of the runner wheel.
7 Flow can be regulated without loss. Flow cannot be regulated without loss.
8 Draft tube is not required. Draft tube is required.