francis turbine

The inward flow reaction turbine having radial discharge at outlet is called Francis turbine

The comparison kaplan and francis hydro power turbine is as under:

1. Efficiency of Kaplan hydro power turbine is higher.

2. Kaplan turbine is more compact in cross-section and has higher rotational speed to that of francis hydro power turbine.

3. In Kaplan turbine, the water flow is axia and in francis trubine it is radial.

4. The runner blades in the kaplan turbine is less in number.

5. Specific speed of Kaplan turbine is 2 to 3 times that of Fancis turbine.

6. Friction loss in Kaplan turbine is less.

7. Francis turbine requires medium head while Kaplan trubines are low head hydro power turbines.

The Kaplan turbine is a newer, more revolutionary version of the Francis turbine, which came before it. The draft tube is used so that the turbine does not need to be where the water flow is lowest.

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