A ratio between compressible fluid volumetric flowrate and incompressible fluid volumetric flowrate through the ideal orifice:
(1) | \epsilon = \frac{q_{\rm compressible}}{q_{\rm incompressible}} |
where
(2) | q_{\rm incompressible} = \cdot \frac{\pi d^2}{4} \cdot \sqrt{\frac{2 \cdot \Delta p}{\rho \cdot (1-\beta^4)}} |
and
\Delta p | pressure drop on the choke, \Delta p = p_{in} - p_{out} |
\beta = \frac{d}{D} | choke narrowing ratio |
d | orifice diameter |
D | pipe diameter |
See also
Physics / Fluid Dynamics / Pipe Flow Dynamics / Pipe Flow Simulation (PFS) / Pipeline Choke @model