The critical pressure gives the velocity of steam at the throat equal to the velocity of sound.

The turbine, in which the general direction of the steam flow is parallel to the turbine axis, is called axial flow turbines

.A regenerative steam cycle renders

The isentropic
enthalpy drop in moving blade is two-third of the isentropic enthalpy
drop in fixed blades of a turbine. The degree of reaction will be

The efficiency of reaction turbine is maximum when (where `alpha` = Angle made by the absolute velocity (V) at inlet)

The impulse reaction turbine has its driving force

In a nozzle, whole frictional loss is assumed to occur between

The pressure at which the steam leaves the nozzle is known as back pressure.

The discharge of steam in a convergent-divergent nozzle __________ after
the throat (i.e. in the divergent portion of the nozzle)