What is the rothalpy?

Answer 1

It is a function/property that remains constant throughout a rotating machine,i.e in an adiabatic irreversible process relative to the rotating component.

Answer 2

Rothalpy is a property used in thermodynamics that combines the enthalpy and the total pressure of a system into a single value to simplify energy balance calculations and analysis. It is particularly useful in studying compressible fluid flow processes.