AN EXPERIMENTAL-STUDY OF THE DISCHARGE COEFFICIENT OF PIPE PERFORATIONS

Experiments were conducted to study the variation of the pressure loss coefficient of pipe perforations with geometrical parameters of the p erforations and a Reynolds number based on the hydraulic diameter of a n orifice representing the perforations. The experimental data are use d to develop an empirical relationship between the head loss across th e perforations and the geometrical and hydraulic parameters related to the perforations which was seen to give better predictions when the p erforations are not very closely spaced. The experimental results repo rted herein correspond to the pipes of small perforated length, with d ownstream end of the pipe closed.