Author(s): Hesham El Karamany, Amro El Baz, Ghada Heikal, Amany M. Elhady
Published in: International Journal of Engineering Research & Technology
License: This work is licensed under a Creative Commons Attribution 4.0 International License.
Volume/Issue: Volume. 6 - Issue. 08 , August - 2017
Vortex drop manhole has been improved to solve number of problems associated with conventional drop systems. It dissipates the flow energy, protecting the drop structure from intensive corrosion and abrasive wear. The aim of this present study is to investigate the hydraulic performance of a simplified eccentric vortex drop shaft in order to keep the configuration of vortex shaft elements as simple as possible to facilitate its con-struction and minimize the construction and maintenance cost ,at the same time be ensured that the vortex shaft hydraulically effi-cient and stable. Two models have been constructed to investigate the use of centric and eccentric vertical shaft. Results showed that the use of eccentric chamber reduces the vortex chamber height by 25% and it is allowed to pass 19% flow rates more than the centric chamber. Results also showed that the eccentric shaft rises the dissolved oxygen concentration by 14% than the centric shaft at the maximum discharge. In addition, decreasing the enlarge-ment angle from 270º to 220º increasing the amount of flow rate passing through the shaft by 18% and decreasing the water depths above the vortex channel by 29%.
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