The steam in such a set of conditions, is said to be supersaturated or in metastable state. ... It is also called super cooled steam ,as its temperature at any pressure is less than the saturation temperature corresponding to the pressure.

What do you mean by a supersaturated flow?

Supersaturated flow or Meta stable flow in Nozzles: As steam expands in the nozzle, its pressure and temperature drop, and it is expected that the steam start condensing when it strikes the saturation line.

What are the effect of supersaturation flow?

Thus the effect of supersaturation is to reduce the enthalpy drop slightly during the expansion and consequently a corresponding reduction in final velocity.