Impulse turbines change the direction of flow of a high velocity fluid or gas jet. The resulting impulse spins the turbine and leaves the fluid flow with diminished kinetic energy.
turbine, any of various devices that convert the energy in a stream of fluid into mechanical energy. The conversion is generally accomplished by passing the fluid through a system of stationary passages or vanes that alternate with passages consisting of finlike blades attached to a rotor.
Turbines are generally used in electrical generation, engines, and propulsion systems. Turbines are machines (specifically turbomachines) because turbines transmit and modify energy.