ESDU TN 07007:2012

This Technical Note provides a review of the data in the
literature for incompressible flow through orifice plates published
prior to 2006. These data include measurements and numerical
predictions of the flow field and pressure distribution over the
orifice test pipe, pressure drops across the orifice plate, and
pressure loss and discharge coefficients data. Although a
considerable part of the data reviewed is from measurements in
orifice flow-meters and in support of their international
standards, the data reviewed here are beyond these standards.

The consistency of the data and the effects of non-standard
flow, operation and installation conditions are discussed. The main
emphasis of this Technical Note is on data for: (1) circular,
concentric orifices in circular pipes, (2) ducts with identical
downstream and upstream cross-sectional areas, (3) laminar,
transitional and turbulent flow regimes, (4) fully-developed,
swirl-free, steady flow conditions with no-cross flow upstream and
downstream of the orifice plate, and (5) single-phase, Newtonian
liquids and gases in incompressible flow. However, a brief review
on the data for cooling holes, annular and non-circular orifices,
and perforated plates is also presented.