FME28 Francis Turbine

With the Francis Turbine unit, "FME28", designed by EDIBON, we study the Francis turbines commonly used when we have average flow rates and heights.

This unit consists on a miniature Francis turbine. The water inlet flow is controlled by a valve situated in the Hydraulics Bench (FME00) or Basic Hydraulic Feed System (FME00/B).

It includes a distributor with adjustable guide vanes that allow for control of the water angle of incidence in the turbine. To adjust the turbine distributor, the unit has a lever on the front of the same. It also has a braking system, connected to two dynamometers, that allows to vary the load supplied to the turbine.

The inlet pressure of the turbine is measured with a manometer situated at the turbine inlet. The feed or spiral chamber is provided with a damping cover and two tubes to avoid water overflow. Its name indicates that it is spiral-shaped and for this reason it is known as snail chamber. Thanks to its design, the water flows at a constant velocity without forming swirls. This way, there are no load losses. The turbine’s axis velocity is determined by a tachometer.