Nature of flow through a well-designed nozzle Assume steady, adiabatic expansion with negligible potential energy change and small friction. How is the flow commonly idealized?

Concept/Approach

• An ideal nozzle converts enthalpy drop into kinetic energy with no heat transfer or irreversibility; thus the expansion is modeled as isentropic.
• Pressure and density change; volume is not constant, and the process is not isothermal in general.

Final AnswerIsentropic flow