Flashing calculations
Flashing calculations
(OP)
I'm trying to calculate the estimated flow rate of 1000psi saturated water through an orifice through which water discharges to the atmospheric pressure. Since flash evaporation occurs in this process I really don't know how to raise the problem.





RE: Flashing calculations
If the temperature and dynamic pressure of the water upstream and in the throat of the orifice results in the water being only 1 phase (i.e. liquid), then most first year fluid mechanics texts cover single phase flow through an orifice pretty well.
If the temperature and dynamic pressure of the water upstream and in the throat of the orifice results in the water going into two phases, then you need to consult more sophisticated references, but I won't get into this until we get some feedback from you.
Good luck,
Latexman
RE: Flashing calculations
CMRM:
It would be most useful for you to read the many papers by Hans Fauske on the flashing of saturated (or sub-cooled) liquids through equiment leaks. One such paper is:
Fauske, Hans K., "Flashing Flows: Some Guidelines For Emergency Releases", Plant/Operations Progress, July 1985
If you cannot find Fauske's papers, then you can purchase copies from this website:
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Milton Beychok
(Visit me at www.air-dispersion.com)
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