Francis Turbine is a reaction turbine, a category of turbine in which the working fluid enters a turbine under tremendous pressure and energy is extracted from the working fluid by turbine blades. Due to the pressure changes occurring in the turbine blades, the expression of the degree Of reaction is quantified, while the remainder of the energy is extracted by the volute of the turbine, so that a portion of the energy is released by the fluid. At the exit, the fluid of the swirling cup-shaped runner features, leaving at Low speeds and low vortices, leaving little kinetic or potential energy. The shape of the turbine's outlet tube helps to slow the flow of water and restore stress.
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