Author(s): Luo Can, Liu Chao
Linked Author(s): Chao Liu
Keywords: Pumping station, sump, side intake, recirculation, numerical simulation
Abstract: The pumping station which has 16 intake sumps for pumps was set combined with the ship lock together. The ship lock was used as the forebay of pumping station. 14 axial flow pump units were installed in middle of the pumping station. The single discharge of each unit is 1. 5m3/s. The designed water level is 1. 76m and the total designed discharge is 20m3/s for irrigation. The vortices and recirculation flow were often found in the forebay and sump of the pumping station which resulted in vibration and decrease efficiencies of the pump system. The goal of the study is to improve the flow pattern in the intake sump by means of some measures. The multi-segment non-continuous diversion pier, the back baffle and the column were used to eliminate the vortices. To predict the flow fields in the forebay and sump before and after improvement with different measures, the numerical simulation was conducted using the software Fluent. The results show that the recirculation zones get smaller or disappear. The velocity circulation near the back wall is significantly reduced. The flow velocities at the inlet of the pumps are uniform and symmetrical. The velocity distribution on each section is more uniform. The flow pattern is well improved for the operation of pump
Year: 2017