Project Title: Pump Modeling for Proposed Design of Flood Mitigation and Construction of Pump House at Taman Chai Leng, Perai


Funder: Oristan Engineering Sdn. Bhd.

Duration: August - December 1999 




This report covers the testing program undertaken in designing pump sump for Taman Chai Leng Flood Mitigation in Seberang Perai Tengah, Penang. The operations of four pumps on the 1/10th scale physical model for the proposed pumping station were tested in Hydrology/Hydraulics Laboratory at Universiti Sains Malaysia, Perak Branch Campus, Seri Iskandar



The purposes of hydraulic model test are to identify:

  • Surfaces vortices that may draw air from free surfaces into the pump, causing unbalanced loading of the  impeller, periodic vibrator and reduction in pump capacity.

  • Subsurface vortices, which may emanate from the floor, side or back walls, or both, entering the pump, causing vibration and cavitation.

  • Pre-rotation of flow entering the pump which will change the attached angle of the impeller blades from the design value and may affect pump efficiency and cause cavitation.

  • An uneven distribution of flow at the pump throat which may cause vibration and cavitation.

  • Separation of flow from the pump suction bell surface extending to the throat which may cause a non-uniform flow field at the impeller and also the possibility of cavitation.