EXPERIMENTAL INVESTIGATION ON DRAINAGE FACULTY IN PIPE WITH FREE OUTLET FLOW

Abstract

This report presents the drainage ability of sloped pipe connected to reservoir facility. In order to clarify the relationship between the installation of sloped pipe (e.g., slope angle and pipe length) and the drainage ability in pipe with free outlet flow, the discharge coefficients were investigated experimentally by using physical models. The experimental results yield that the drainage ability depends on the slope of pipe under given diameter and length of pipe and discharge. Also, for either a steep slope of pipe or a short pipe, a supercritical flow is formed in the pipe even if the water level is increased at the upstream of pipe, and the drainage ability is diminished drastically.