The effect of considering friction in steam nozzles for the same pressure ratio leads to_________?
Correct answer: A. increase in dryness fraction of exit steam
- A. increase in dryness fraction of exit steam
- B. decrease in dryness fraction of exit steam
- C. no change in the quality of exit steam
- D. decrease or increase of dryness fraction of exit steam depending upon inlet quality
Explanation
Nozzle friction increases the actual exit enthalpy at the same pressure, and for wet steam this corresponds to a higher dryness fraction. Thus, friction makes the exit steam drier than in isentropic expansion.
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