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0 <br />Orifice Desiqn: Q= Ca 2gh <br />where <br />for <br />4 <br />� <br />a <br />4 <br />h <br />C <br />Q <br />9 <br />�1 <br />a <br />a <br />J�%; ,_. :/ <br />= Discharg" cfs <br />= Coefficient of discharge <br />= area of orifice, sq. ft. <br />= acceleration of gravity, ft. per sec.2 <br />= head on the center of orifice, ft. <br />= 0.60 <br />= 0.77 cfs <br />= 32.2 ft/sec.2 <br />= 1.5 ieet <br />.. a = Q = 0.77 <br />� -'9h (0.6) (2)(32.21(1.5) <br />= 0.13 sq. ft. <br />= 18.80 sq. in. <br />since a = � r2 <br />�. Radius = r= 1� = 2,45 in. <br />� 'f•r' <br />• D = 9.90 inches <br />See Gxhibit III for detail. <br />�t� <br />