The Hydraulic Turbines are classified according to the type of energy available at the inlet of the turbines, direction of flow, head at inlet of the turbine and specific speed of the turbines.

1] According to the type of energy at inlet.

a] Impulse turbine.

b] Reaction turbine.

2] According to the direction of flow through runner.

a] Tangential flow turbine.

b] Radial flow turbine.

c] Axial flow turbine.

d] Mixed flow turbine.

3] According to the head at inlet of turbine.

a] High head turbine.

b] Low head turbine.

4] According to the specific speed of the turbine.

a] Low specific speed turbine.

b] Medium specific speed turbine.

c] High specific speed turbine.