Study on the Hydraulic Characteristics of an Eccentric Tapering Outlet Pressure Box Culvert in a Pumping Station

The outlet pressure box culvert is often used as the drainage building of a pumping station. Because its compact structure, it produces transverse flow velocity and then forms poor patterns, such bias flow, reflux, separation, which affect discharge efficiency Based on combination physical model test numerical simulation, hydraulic characteristics an eccentric tapering were analyzed. Focusing pattern in culvert, different optimization schemes proposed to adjust pattern. pattern, distribution ratio (which represents proportion velocity), average angle axial velocity, uniformity, each scheme compared obtain best scheme. results show that “diversion pier position with deflecting baseplate” has effect This can effectively improve bad significantly reduce ratio, make both sides long diversion uniform. uniformity was increased by 17.45%, 8.23°.