Comparison between Impulse Turbine and Radial Flow Turbine

Comparison between Impulse Turbine and Radial Flow Turbine Points : Comparison between Impulse Turbine and Radial Flow Turbine, Difference between Impulse Turbine and Radial Flow Turbine, Impulse Turbine Vs Radial Flow Turbine

Comparison between Impulse Turbine and Radial Flow Turbine
	Impulse Turbine	Radial Flow Turbine
1.	Extent to which water does not fill the bucket fully and the air has an easy access to the buckets.	Extent to which water completely fills all the passages between the blades.
2.	Admittance of water over the wheel it may enter a part or whole of the wheel circumference.	Admittance of water over the wheel is sprayed over the circumference of the wheel.
3.	Flow regulation by means of a needle valve fitted into the nozzle. Impossible without loss.	Flow regulation by means of a guide-vane assembly. Always accompanied by a loss.
4.	Pressure remains same throughout the action of the water on the runner.	After entrance at the runner, water undergoes changes both in velocity and pressure.
5.	Requirement of draft tube is not required.	Requirement of draft tube is required.
6.	The available fluid energy is converted into K.E. by a nozzle.	The energy of the fluid is partly transformed into KE. before fluid enters the runner of the turbine.
7.	Relative velocity of water is either remains constant or reduces slightly due to friction.	Relative velocity of is increase.
8.	Installation of unit are always installed above the tail race.	Installation of unit may be installed above or below tail race.