Compounding in Steam Turbines

Question

Why Compounding is required in the steam turbines?

Answer 1

In simple impulse turbine, if the steam is expanded from the boiler pressure to the condenser pressure in one stage the speed of the rotor becomes tremendously high which results in the practical complicacies. There are a few methods of decreasing the speed to the lower value, all these methods utilizes a multiple system of the rotor in series keyboard to a common shaft. This is called as Compounding .