Mechanical Engineering - Steam Nozzles and Turbines - Discussion


Which of the following statement is wrong?

[A]. The critical pressure gives the velocity of steam at the throat equal to the velocity of sound.
[B]. The flowin the convergent portion of the nozzle is sub-sonic.
[C]. The flow in the divergent portion of the nozzle is super-sonic.
[D]. To increase the velocity of steam above sonic velocity (super-sonic) by expanding steam below the critical pressure, the divergent portion for the nozzle is not necessary.

Answer: Option D


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