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Restriction after control valve

Restriction after control valve

Restriction after control valve

(OP)
Hi,

I have an installation with restrictions after control valves and I'm looking to calculate pressure drop vs flow for all of them. The type of restrictions are:
1) Perforated plates with various amount of holes and hole diameter
2) Tank diffuser, pipe extends into tank and has large number of holes in the wall

The medium is condensate (flashing/non-flashing), steam and in some cases two phase flow (steam+condensate).
Does anyone know any reference (book/paper/standard..) which could be used for these calculations as well as design of new similar restrictions?

thanks
Drex

RE: Restriction after control valve

This probably doesn't completely answers your question, but may be useful or trigger something else.  It contains some charts giving maximum mass flux for given inlet stagnation pressure and enthalpy.

F.J. Moody, Maximum Two-Phase Vessel Blowdown From Pipes, AEPD-4827
http://www.osti.gov/bridge/product.biblio.jsp?osti_id=4575624
 

RE: Restriction after control valve

You could give a shot to this on-line calculator for perforated plates (two phase flow calculations not foreseen).

http://www.pressure-drop.mobi/

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