Difference between Impulse turbine and Reaction turbine.

Difference between Impulse turbine and Reaction turbine.
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1 Answer

Answer :

Impulse turbine
Reaction turbine
1. Steam completely expands in nozzle and pressure remains constant during flow through the blade passage.
2. Relative velocity of steam passing over blade of impulse turbine is constant.
3. Pressure is same at inlet and outlet.
4. Steam velocity is very high.
5. Lesser number of stages required.
6. It occupies less space per unit power.
7. Blades are symmetrical profile type.
1.Steam expands partly in nozzle and further expansion take place in rotor blade passage.
2.Relative velocity increases as steam passing over the blade expands.
3.Pressure is different at inlet and outlet. 3.Steam velocity is not very high.
4.More numbers of stages required.
5.It occupies more space per unit power.
6.The blades are aerofoil & non symmetrical type.
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