|
|
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.
|
|