Flow through an "annular orifice". 2

[Goosen]

Greetings Mechanikals,

I need some help in determining the flow through what I will call an “annular orifice”.

1. I have a smooth pipe with an inside diameter of 24 in.

2. Centered in that pipe is a thin plate with an outside diameter that is 0.08 in. smaller than the inside diameter of the pipe.

3. I know the pressure drop across the plate to be 0.5 psid.

4. The medium is water at 80 deg F.

What is the formula for calculating the flow through this annulus?

Thanks in advance,

Goosen

 

[bk834]

Goosen,

I realize this is an old thread but thought I'd offer another source of reference for this application.

R.W. Miller's Flow Measurement Engineering Handbook, 2nd Ed
pp. 11-5 through 11-7 discusses the Annular Orifice and gives an example.

bk

 

[sprintcar]

I'm looking for similar equations to determine flow rate thru annuli based on the 2 diameters and the pressure differential. Fluid is water at 80 deg F. We don't have any of the cited references, and someone 'borrowed' the Crane Tech #410.
Can someone post the equations or a link to them?
Thanks!!!!

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