Steam nozzle losses — where friction is assumed to act In a practical analysis of a convergent–divergent steam nozzle, the entire frictional loss is assumed to occur in a specific region of the nozzle. Identify that region.

Concept/Approach

• In steam nozzles, boundary layer growth and condensation effects are most significant in the divergent portion, i.e., from throat to exit; analyses often lump friction there.
• Assuming losses concentrated after the throat simplifies modeling of velocity loss and exit pressure for choked flow.

Final AnswerBetween throat and exit