mag

Malaysia Water Research Journal
Figure 6. Modification of a triangle buffer block directly under intake column at
all pumps.
The reading and the calculated angle values of vortimeter with a triangle
buffer block are shown in Table 10 through 13. The modification minimize the
angle of flow and provide a better flow distribution straight to the pump intake
column. These buffers also prevent under current to cross each other. Further, the
45° face of the buffer provide a smooth transition of incoming front flows.
Table 10. Swirl angle degree with a triangle buffer block for case 1.
Test 1 PI P2 P3 P4 Remark
swirl angle (°) 0.9 0.4 0.3 0.0 cw
swirl angle (°) 0.0 0.6 3.3 1.9 acw
Table 11. Swirl angle degree with a triangle buffer block for case 2.
Test 2 PI P2 P3 P4 Remark
swirl angle (°) 0.9 1.4 0.7 cw
swirl angle (°) 0 0.8 1.0 acw
10
Table 12. Swirl angle degree with a triangle buffer block for case 3.
Institut Penyelidikan Hidraulik Kebangsaan Malaysia (NAHRIM)
National Hydraulic Institute of Malaysia (NAHRIM)