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Phrase edge orifice

PhrasesPortable
  • Cunningham ( 1951 ) first drew attention to the fact that choked flow will not occur across a standard, thin, square-edged orifice.
  • The equations provided in American and European national and industry standards and the various coefficients used to differ from each other even to the extent of using different combinations of correction factors, but many are now closely aligned and give identical results; in particular, they use the same " Reader-Harris / Gallagher ( 1998 ) " equation for the coefficient of discharge for sharp-edged orifice plates.