A turbine with blades arranged to develop torque from gradual decrease of steam pressure from inlet to exhaust.
In a reaction turbine, unlike in an impulse turbine, the nozzles that discharge the working fluid are attached to the rotor. The acceleration of the fluid leaving the nozzles produces a reaction force on the pipes, causing the rotor to move in the opposite direction to that of the fluid.  A reaction turbine uses the fluid from the nozzle to create momentum on the stator wheel. More about Impulse Turbine. Impulse turbines convert the energy of the fluid in the form of pressure by changing the direction of the fluid flow when impacted on the rotor blades. Reaction turbines convert the energy of the fluid by the reaction on the rotor blades, when the fluid undergoes a change in momentum. This process can be compared to the reaction on a rocket by the exhaust gas of the rocket. The Francis turbine is a type of reaction turbine, a category of turbine in which the working fluid comes to the turbine under immense pressure and the energy is extracted by the turbine blades from the working fluid. The Francis turbine is a type of water turbine that was developed by James B. Francis in Lowell, Massachusetts. It is an inward-flow reaction turbine that combines radial and axial flow concepts. More about Reaction Turbine. Reaction turbines convert the energy of the fluid by the reaction on the rotor blades, when the fluid undergoes a change in momentum. This process can be compared to the reaction on a rocket by the exhaust gas of the rocket. The process of the reaction turbines are best explained using Newton’s second law reaction turbine. A type of turbine in which the stator vane and the rotor are arranged in such a way that the entire pressure drop takes place between the rotor blades, which have convergent passages in the direction of flow. Reaction turbine. A power-generation prime mover utilizing the steady-flow principle of fluid acceleration, where nozzles are mounted on the moving element. The rotor is turned by the reaction of the issuing fluid jet and is utilized in varying degrees in steam, gas, and hydraulic turbines. 1. In Impulse Turbine all hydraulic energy is converted into kinetic energy by a nozzle and it is is the jet so produced which strikes the runner blades. In Reaction Turbine only some amount of the available energy is converted into kinetic energy before the fluid enters the runner. 2. In a reaction turbine there are no nozzles to direct the steam like in the impulse turbine. Instead, the blades that project radially from the outer edge of the rotor are shaped and mounted so that the shape between the blades, created by the cross-section, create the shape of a nozzle.  There are two main types of hydro turbines: impulse and reaction. The type of hydropower turbine selected for a project is based on the height of standing water—referred to as head—and the flow, or volume of water, at the site. Other deciding factors include how deep the turbine must be set, efficiency, and cost.  Noun. 1. reaction turbine-a turbine with blades arranged to develop torque from gradual decrease of steam pressure from inlet to exhaust. turbine-rotary engine in which the kinetic energy of a moving fluid is converted into mechanical energy by causing a bladed rotor to rotate. 1. (Mechanical Engineering) a turbine in which the working fluid is accelerated by expansion in both the static nozzles and the rotor blades. Torque is produced by the momentum changes in the rotor and by reaction from fluid accelerating out of the rotor. Compare impulse turbine.
http://www.daviddarling.info/encyclopedia/R/AE_reaction_turbine.html http://www.differencebetween.com/difference-between-impulse-turbine-and-vs-reaction-turbine/ https://en.wikipedia.org/wiki/Francis_turbine http://www.differencebetween.com/difference-between-impulse-turbine-and-vs-reaction-turbine/ http://encyclopedia2.thefreedictionary.com/Reaction+turbine http://me-mechanicalengineering.com/comparison-between-impulse-turbine-and-reaction-turbine/ http://turbinegenerator.org/steam/types-steam-turbines/reaction/ http://energy.gov/eere/water/types-hydropower-turbines http://www.thefreedictionary.com/reaction+turbine
what is a reaction turbine