Equation (10.41) for sluice gate discharge is for free outfl ow. If the outfl ow is
Chapter 10, Problem p10.77(choose chapter or problem)
Equation (10.41) for sluice gate discharge is for free outfl ow. If the outfl ow is drowned, as in Fig. 10.10c, there is dissipation, and Cd drops sharply, as shown in Fig. P10.77, taken from Ref. 2. Use this data to restudy Prob. 10.73, with H 5 9 in. Plot the estimated fl ow rate, in gal/min, versus y2 in the range 0.5 ft , y2 , 5 ft. 0.6 0.5 0.4 0.3 0.2 0.1 Cd y1 H y2 H = 0 2 4 6 8 10 12 14 16 Drowned tailwater Fig. 10.10c Free outflow
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