Discussion
In steady adiabatic flow of a perfect gas with no work done, the quantity that stays constant along a streamline is
Answer: A
The energy equation for steady adiabatic flow without work reduces to the statement that the sum of the enthalpy and the kinetic energy per unit mass is constant, and for a perfect gas that sum is proportional to the stagnation temperature. It therefore holds whether the flow is reversible or not.
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