Denali National Park Weather Forecast for Wednesday, April 19. The Denali National Park, AK forecast for Apr 19 is 47 degrees and Patchy rain possible . There is 69 percentage chance of rain and 12 mph winds from the South-Southeast.
Topics: Introduction Equations Discharge Coefficients Error Messages References. Introduction to Orifice Flow Meter Calculation. Orifice flow meters are used to determine a liquid or gas flow rate by measuring the differential pressure (P1 - P2) across the orifice plate. The two standard pressure tapping arrangements for small bore orifices are shown in the drawings; the location of the pressure taps affects the discharge coefficient somewhat.
Air flow in cfm = Open hole area in square inches x 1.25 x â (Î´P in Pascals) x (1 + 0.055 Î´P) Walker explains, âThe odd term at the end of the formula, 1 + 0.055 Î´P, is what accounts for the insertion loss of the flow hood.