Multistage turbines

Steam turbines are used in power generators. A steam turbine as a prime mover is an essential component of a steam power plant. Steam turbines have higher efficiency and greater speed.  Steam turbines works even with the use of very low grade fuel. Design of the turbine rotor for the steam turbine is very easy and perfect mechanical balance can be achieved. A steam turbine operates due to the dynamic action of the steam. Some examples of steam turbines are simple impulse turbine, Parson’s reaction turbine, velocity compounded impulse turbine, pressure compounded impulse turbine, multistage turbine and radial flow turbine. Multistage turbine is a turbine where two or more turbines are combined. They are also known as combination turbines. Mainly there are three combinations. First one is a velocity compounded impulse turbine followed by several single row impulse turbines. In the second type, a velocity compounded impulse turbine is followed by several stages of reaction blading. The third category is a single impulse stage followed by several stages of reaction blading.