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Small superflow bench scaling and correlation to larger bench

Small superflow bench scaling and correlation to larger bench

Small superflow bench scaling and correlation to larger bench

(OP)
Hopefully this is the best place for this question.

I am using a Superflow 1020 orifice bench and am tasked with correlating results to a much larger 40y/o manometer type orifice bench. The range of pressure on the 1020 is ~0 to -17"h2o and the large bench is something like 0 to -250"h20.

Questions is this:
What equations are there to scale up the small flow results to the larger bench's values based on pressure correction?

It has been awhile since I have studied fluids and have been working in vehicle dynamics and vibrations lately.

RE: Small superflow bench scaling and correlation to larger bench

(OP)
after some searching I used eqn. 6 here:
http://en.wikipedia.org/wiki/Orifice_plate

used my known small bench data (mass flow rate,k, and pressure ratio) to coefficients (C*A*sqrt(2M/ZR)) in one variable "X"

then I resolved using this "X" and a new pressure ratio to get a new mass flow rate.

this seems to provide a close value to the known large bench data.

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