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Malaysia Water Research Journal<br />
Test 3 PI P2 P3 P4 Remark<br />
swirl angle (°) 0.6 0.3 cw<br />
swirl angle (°) 0.0 0.2 acw<br />
Table 13. Swirl angle degree with a triangle buffer block for case 4.<br />
Test 4 PI P2 P3 P4 Remark<br />
swirl angle (°) 3.0 cw<br />
swirl angle (°) 0.0 acw<br />
4 CONCLUSION<br />
The results from the initial testing conclude that the proposed design for<br />
the Belibis River Pump Sump are not acceptable at three pump protocols. First<br />
when all 4 pumps in operations (Case 1 - 2 major and 2 minor). The occurrences<br />
of uneven flow distribution into the pump intake columns that indicated by<br />
the entrance degree of vortimeter greater than 5°. Second when 3 pumps in<br />
operations (Case 2 - 2 major and 1 minor). The occurrences of uneven flow<br />
distribution into the pump intake columns that indicated by the entrance degree<br />
of vortimeter greater than 5°. And the last one when only 1 pump in operation<br />
(Case 4 – 1 minor). The occurrence of uneven flow distribution into the pump<br />
intake column that indicated by the entrance degree of vortimeter greater than<br />
5°. Thus, a minor modification is required by installation a triangle buffer block<br />
directly under all of the pump intake column as shown in Figure 6. During detail<br />
testing and analysis, the installation of the buffer shown a better flow distribution<br />
on all cases.<br />
REFERENCES<br />
Ansar, M. (1997). Experimental and Theoretical Studies of Pump Approach Flow<br />
Distributions at Water Intakes. PhD Thesis, University of Iowa, U.S.A.<br />
Archambeau, P., Erpicum, S., Mouzelard, T. and Pirotton, M. (2001). Experimental<br />
- numerical model interaction: example of a large dam project in Laos.<br />
Water Resources Management 2001, WIT Press, Southampton, Boston, 365-<br />
374 pp.<br />
Chanson, H. (1999). The Hydraulics of Open Channel Flow, Arnold, London, U.K.<br />
Erpicum, S., Dewals, B., Archambeau, P., Detrembleur, S., Fraikin, C. and<br />
Pirotton, M. (2008). Scale modelling and similarity laws for the study of an<br />
under pressure settling structure. 9th International Symposium on River<br />
Sedimentation, Tsinghua University Press, China.<br />
Pirotton, M., Archambeau, P., Erpicum, S. and Mouzelard, T. (2001). Water<br />
management of large dams. International Symposium on Environmental<br />
Hydraulics, Arizona State University, U.S.A.<br />
Institut Penyelidikan Hidraulik Kebangsaan Malaysia (NAHRIM)<br />
11<br />
National Hydraulic Institute of Malaysia (NAHRIM)
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