mag

Malaysia Water Research Journal
Table 6. Pump configuration and swirl angle degree for case 1.
Test 1 PI P2 P3 P4 Remark
swirl angle (°) 4.8 0.0 0.9 0.4 cw
swirl angle (°) 0 15.2 2.8 2.1 acw
Table 7. Pump configuration and swirl angle degree for case 2.
Test 2 PI P2 P3 P4 Remark
swirl angle (°) 4.0 5.3 3.0 cw
swirl angle (°) 0 1.2 1.6 acw
Table 8. Pump configuration and swirl angle degree for case 3.
Test 3 PI P2 P3 P4 Remark
swirl angle (°) 0.6 0.1 cw
swirl angle (°) 0.2 0.6 acw
Table 9. Pump configuration and swirl angle degree for case 4.
Test 4 PI P2 P3 P4 Remark
swirl angle (°) 9.1 cw
swirl angle (°) 0.0 acw
3.3 Modification and improvement at pump intake
Since the initial proposed design indicated the existence of some degree
of uneven flow distribution in the intake column sections, modification tests are
required. The retests were conducted with a triangle buffer blocks directly under
all of the pump intake column.
The detail modifications of a triangle buffer block directly under the pump
intake column are shown Figure 6. The buffers divide the under current flow on
the pump sump and direct them straight to the intake column. These buffers
prevent from the occurrences of cross current directly under the intake column.
Therefore, these could lead to a better flow distribution.
Institut Penyelidikan Hidraulik Kebangsaan Malaysia (NAHRIM)
9
National Hydraulic Institute of Malaysia (NAHRIM)