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A.2. ORIFICES An orifice is a submerged opening with a closed perimeter through which water flows. Orifices are analyzed using the following equation: Q = CA 2gh where: Q = Discharge in cfs C = Coefficient of discharge from Handbook of Hydraulics, King and Brater, 5th Edition (or comparable) A = Area of opening in square feet
1 sty 2020 · The flow discharge through the orifice can be ca lculated by using the energy equation . Applying energy equation between point 1 at water surface in the tank and
Submerged Orifices. Flow through a submerged orifice may be computed by applying Bernoulli’s equation to points 1 and 2 in figure below. Values of C for submerged orifices do not differ greatly from those for nonsubmerged orifices.
Preview Submerged Orifice Operating under Steady-Flow Conditions. Eq. 1. Q = A2 v2 = Cd Cc Cv Cva A [ 2 g (h1 - h2) ](1/2) The coefficient of contraction, Cc, accounts for the flow area reduction of the jet caused by the flow curving and springing from the orifice edges.
The equation for computing the discharge of the standard submerged rectangular orifice is: (9-1b) where: Q = discharge (ft 3 /s) C c = coefficient of contraction C vf = coefficient of velocity caused by friction loss C va = coefficient to account for exclusion of approach velocity head from the equation A = the area of the orifice (ft 2)
1 sty 2016 · The basic discharge equation for submerged orifices and sluice gates is (F33) where ( h 1 – h 2 ) is the differential head across the orifice or sluice gate, or the difference between the upstream and downstream water levels.
