Author(s): Mohd Kamarul Huda Samion, Mohd Fauzi Mohamad, Khairol Azuan Adam
Linked Author(s): Mohd Kamarul Huda Samion
Keywords: Hydraulic, physical Model, pre-rotation flow, pump sump, vortices
Abstract:
A new flood mitigation project was implemented by Malaysian Government at Pekan, Pahang due to frequent flooding causing various losses of property and lives. A pump station is stationed just downstream of the Belibis river for diverting the discharge to reduce the impact of the flooding. Hydraulic model studies are necessary for the pump sumps intake due to the operational requirements of the pumps in a limited space environment which can leads to hydraulic problems. The purposes of this hydraulic model study is to identify undesirable flow conditions in the pump sump model such as vortices, pre-rotation of flow and uneven distribution of flow and propose improvements to the pump sump prototype based on model testing results. Based on the optimum model discharge, an undistorted scale model of 1:10 is adopted. The model features four pumps (7.91 l/s for pump 1 and 2, and 4.74 l/s for pump 3 and 4) with different values of water depth in total of 4 cases of study. Pump flow rate measurements are obtained by ultrasonic flow meter and swirl angle in the suction intakes are measured by a vortimeter. No vortices occurred near the suction intake for all cases but an uneven flow through the suction intake has been detected in some cases. A minor modification is required by installation of buffer block directly under the pump intake column. (2602, 62, 335)
Year: 2017