In this paper, water levels variation in the sump intake is studied in El- SHABAB Pumping Station. ANSYS Ver.17.1 flow simulation software is used to simulate the flow conditions to overcome decreasing water level in the low demands period, winter closure. Seven scenarios are studied to obtain the best one to apply it at that condition. Case 1 represents the optimum design when the submergence water level is 5m above the sump floor and the length of submersed part in the sump is 3.5m. Case 2 represents the winter closure period where the submergence water level decreased by 1.5m to become 3.5m in the period winter closure and the length of submersed part in the sump is 2m. As a result, velocity in the suction pipe decreased 26%, a swirl angle 10.79° is attained, and vibration level increased 4 times representing hydraulic and dynamic problems. Case 3 is done by adding a joint with length 0.5m to the submersed part of pipe. Case 4 is done by increasing a joint length by 1m to the submersed part of pipe. Case 5 is done by adding a cone under the bell mouse with height 1m and with the same pipe diameter. Case 6 is done by adding a cone under the bell mouse with height 1m and 0.5m joint leading to increase the submersed part of pipe to become 2.5m. Case 7 is done by repeating case 6 with increasing water submerging level after finishing the period of winter closure where the water level in the sump is 5m. The results indicate that, during the period of winter closure, Case 6 is the best condition to use where it prevents vortex and has the best swirling angle 5.12° with no turbulence is observed at the entrance of the pump improving the dynamic and hydraulic performance of the pump. Also, the results indicate that Case 7 after finishing the period of winter closure and water level returned to become 5m (optimum design) is the best condition to use during all seasons where it prevents vortex and has the best swirling angle 4.66°.
| Published in | American Journal of Water Science and Engineering (Volume 3, Issue 3) |
| DOI | 10.11648/j.ajwse.20170303.11 |
| Page(s) | 34-44 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2017. Published by Science Publishing Group |
Pump Intake, Vortex, Computational Fluid Dynamics (CFD), Hydraulic Problems, Suction Sump, Water Level, Simulation
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APA Style
Sami Abdel-Fattah Abdel-Ghani El-Shaikh. (2017). CFD Technique for Solving Low Water Level Problem of Axial Flow Pumps. American Journal of Water Science and Engineering, 3(3), 34-44. https://doi.org/10.11648/j.ajwse.20170303.11
ACS Style
Sami Abdel-Fattah Abdel-Ghani El-Shaikh. CFD Technique for Solving Low Water Level Problem of Axial Flow Pumps. Am. J. Water Sci. Eng. 2017, 3(3), 34-44. doi: 10.11648/j.ajwse.20170303.11
AMA Style
Sami Abdel-Fattah Abdel-Ghani El-Shaikh. CFD Technique for Solving Low Water Level Problem of Axial Flow Pumps. Am J Water Sci Eng. 2017;3(3):34-44. doi: 10.11648/j.ajwse.20170303.11
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Download@article{10.11648/j.ajwse.20170303.11,
author = {Sami Abdel-Fattah Abdel-Ghani El-Shaikh},
title = {CFD Technique for Solving Low Water Level Problem of Axial Flow Pumps},
journal = {American Journal of Water Science and Engineering},
volume = {3},
number = {3},
pages = {34-44},
doi = {10.11648/j.ajwse.20170303.11},
url = {https://doi.org/10.11648/j.ajwse.20170303.11},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajwse.20170303.11},
abstract = {In this paper, water levels variation in the sump intake is studied in El- SHABAB Pumping Station. ANSYS Ver.17.1 flow simulation software is used to simulate the flow conditions to overcome decreasing water level in the low demands period, winter closure. Seven scenarios are studied to obtain the best one to apply it at that condition. Case 1 represents the optimum design when the submergence water level is 5m above the sump floor and the length of submersed part in the sump is 3.5m. Case 2 represents the winter closure period where the submergence water level decreased by 1.5m to become 3.5m in the period winter closure and the length of submersed part in the sump is 2m. As a result, velocity in the suction pipe decreased 26%, a swirl angle 10.79° is attained, and vibration level increased 4 times representing hydraulic and dynamic problems. Case 3 is done by adding a joint with length 0.5m to the submersed part of pipe. Case 4 is done by increasing a joint length by 1m to the submersed part of pipe. Case 5 is done by adding a cone under the bell mouse with height 1m and with the same pipe diameter. Case 6 is done by adding a cone under the bell mouse with height 1m and 0.5m joint leading to increase the submersed part of pipe to become 2.5m. Case 7 is done by repeating case 6 with increasing water submerging level after finishing the period of winter closure where the water level in the sump is 5m. The results indicate that, during the period of winter closure, Case 6 is the best condition to use where it prevents vortex and has the best swirling angle 5.12° with no turbulence is observed at the entrance of the pump improving the dynamic and hydraulic performance of the pump. Also, the results indicate that Case 7 after finishing the period of winter closure and water level returned to become 5m (optimum design) is the best condition to use during all seasons where it prevents vortex and has the best swirling angle 4.66°.},
year = {2017}
}
TY - JOUR T1 - CFD Technique for Solving Low Water Level Problem of Axial Flow Pumps AU - Sami Abdel-Fattah Abdel-Ghani El-Shaikh Y1 - 2017/09/12 PY - 2017 N1 - https://doi.org/10.11648/j.ajwse.20170303.11 DO - 10.11648/j.ajwse.20170303.11 T2 - American Journal of Water Science and Engineering JF - American Journal of Water Science and Engineering JO - American Journal of Water Science and Engineering SP - 34 EP - 44 PB - Science Publishing Group SN - 2575-1875 UR - https://doi.org/10.11648/j.ajwse.20170303.11 AB - In this paper, water levels variation in the sump intake is studied in El- SHABAB Pumping Station. ANSYS Ver.17.1 flow simulation software is used to simulate the flow conditions to overcome decreasing water level in the low demands period, winter closure. Seven scenarios are studied to obtain the best one to apply it at that condition. Case 1 represents the optimum design when the submergence water level is 5m above the sump floor and the length of submersed part in the sump is 3.5m. Case 2 represents the winter closure period where the submergence water level decreased by 1.5m to become 3.5m in the period winter closure and the length of submersed part in the sump is 2m. As a result, velocity in the suction pipe decreased 26%, a swirl angle 10.79° is attained, and vibration level increased 4 times representing hydraulic and dynamic problems. Case 3 is done by adding a joint with length 0.5m to the submersed part of pipe. Case 4 is done by increasing a joint length by 1m to the submersed part of pipe. Case 5 is done by adding a cone under the bell mouse with height 1m and with the same pipe diameter. Case 6 is done by adding a cone under the bell mouse with height 1m and 0.5m joint leading to increase the submersed part of pipe to become 2.5m. Case 7 is done by repeating case 6 with increasing water submerging level after finishing the period of winter closure where the water level in the sump is 5m. The results indicate that, during the period of winter closure, Case 6 is the best condition to use where it prevents vortex and has the best swirling angle 5.12° with no turbulence is observed at the entrance of the pump improving the dynamic and hydraulic performance of the pump. Also, the results indicate that Case 7 after finishing the period of winter closure and water level returned to become 5m (optimum design) is the best condition to use during all seasons where it prevents vortex and has the best swirling angle 4.66°. VL - 3 IS - 3 ER -
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