Author(s): Cumhur Ozbey
Linked Author(s): Cumhur Özbey
Keywords: Hydraulic Efficiency Grate Inlet Side Grate Experimental Work Urban Drainage
Abstract: In this study, the hydraulic efficiencies of the side grate inlets were experimentally investigated in a recirculating laboratory flume of 12 m long and 0.9 m wide. The longitudinal and cross slopes are constant for all tests at 1/300 and 0%, respectively. The distance between the two grate sections is 0.2 meters and the system enables testing the hydraulic performances of grates either by placing them one by one at any of the two sections or by testing two grates simultaneously. The intercepted and bypassed flows were both collected at the pools that were placed at the downstream end of the main channel. The tests were carried out under different approach flow rates ranging between 1 L/s < Qt < 5.5 L/s. In this regard, two grate inlet systems are compared where the total area of the voids are identical: (i) isolated side grates located at a distance with a zig-zag pattern, and (ii) side grates located at both sides of the cross-section. Accordingly, a strong correlation was found between the interception efficiency of the side grates and the total upcoming flow rate. Moreover, positioning the side grates successively was found to be hydraulically more efficient than locating the grates at both sides of the channel cross-section.
Year: 2025