Francis turbine and axial flow turbine in the structure of the difference is:

1. Runner area of different water flow: axial flow turbine to maintain axial flow, Francis Turbine from the radial into the axial outflow.

2. Blade structure is different: Francis turbine blades are fixed, adjustable axial turbine blades are fixed and propeller (blade adjustable) two.

3. Francis turbine is more compact than axial flow turbine and cost less than axial turbine.

Francis turbines, also known as Francis turbines, flow from the radial flow into the runner, and then approximately axially out of the runner, the wheel by the crown, the lower ring and leaves.

Francis turbine is a compact, highly efficient, able to adapt to a wide range of head, is currently widely used in the world one of the types of turbines. When the water flow through this turbine working wheel, it enters the radial, axial outflow, it is also known as radial axial flow turbine. It is suitable for the head from 20 meters to 700 meters, the mechanism is simple, stable and efficient, but it is generally used in the middle head (50 meters to 400 meters). Stand out from tens of kilowatts to hundreds of thousands of kilowatts. At present, the maximum output of this turbine has more than 700,000 kilowatts.

Axial flow turbine wheel by the wheel body, leaves, discharge cone composition, the number of leaves less than the mixed flow, the blade axis and turbine axis perpendicular. Applicable to medium and low head, large flow of hydropower stations. In the same head, the speed than the Francis Turbine is high. Application head is about 3 to 80m. The flow of water flows between the guide vane and the runner from radial to axial flow, and in the runner area, the flow remains axial. In the same water head, its overcurrent capacity than the mixed flow, cavitation performance than the mixed flow is poor.