flow calculation of air through orifice
flow calculation of air through orifice
(OP)
Goodevening fellow engineers,
A short question. I have a piece of pipe of known diameter, and orifice of known diameter, and air at known properties. If the range of the orifice DP transmitter is known (for example x mm H2O), how can this be converted into volumetric flow range? I have been browsing around for a while but always get lost in the big heap of information on the net. Thank you for your help!
A short question. I have a piece of pipe of known diameter, and orifice of known diameter, and air at known properties. If the range of the orifice DP transmitter is known (for example x mm H2O), how can this be converted into volumetric flow range? I have been browsing around for a while but always get lost in the big heap of information on the net. Thank you for your help!





RE: flow calculation of air through orifice
I strongly suggest that you read the "Orifice plate" article at: http://en.wikipedia.org/wiki/Orifice_plate
Especially, study the section entitled "Flow of gases through an orifice. It contains the equations you need, for non-choked flow.
I also strongly suggest that you read the "Choked flow" article at http://en.wikipedia.org/wiki/Choked_flow which has the equations for choked flow as well as explaining how to differentiate between choked and non-choked flow.
Milton Beychok
(Visit me at www.air-dispersion.com)
.
RE: flow calculation of air through orifice
Is this a homework question?
The reason I ask is that the orifice lab is a first or second year course for chemmies.
Homework questions are not allowed on Eng-Tips.
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Albert Einstein
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RE: flow calculation of air through orifice
Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada