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Vortex Dissipation Using a Hydraulic-Based Anti-Vortex Device at Intakes

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Abstract

In the present research, dissipating free surface vortices over the intakes by designing a hydraulic anti-vortex method is studied experimentally. In this method, an up-stream submerged water jet is used as a hydraulic-based anti-vortex mechanism. The imposed jet acts as a point source of external momentum to the formed free surface area. The added momentum changes the hydrodynamic balance of the vortex zone, and leads to instability and disability of the vortex to form and develop. Experiments were conducted on a projected horizontal pipe intake to investigate the efficiency of the proposed anti-vortex hydraulic device on dissipating and preventing formation of free surface vortices. Results show that the efficiency of the imposed jet is dependent on the jet linear momentum and vertical distance between the nozzle and intake positions. Moreover, the critical submergence of the intake can potentially reduce up to the nozzle submergence in which less than 10% of the jet momentum is required by decreasing nozzle submergence about 50%. Finally, an empirical equation is suggested to predict the critical submergence of the intake with respect to the jet linear momentum and the nozzle submergence.

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Acknowledgements

The authors would like to express their sincerely appreciations to the assistance provided by Department of Hydraulic Engineering, Water Research Institute of Iran, and Laboratory of Fluid Mechanic of Mechanical Engineering Department (Amirkabir University of Technology) for providing all needed laboratorial supports.

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Authors and Affiliations

  1. Department of Civil and Environmental Engineering, Amirkabir University of Technology, 424 Hafez Ave, Tehran, P.O.B. 159163-4311, Iran

    Morteza Monshizadeh & Ahmad Tahershamsi

  2. Department of Mechanical Engineering, Amirkabir University of Technology, 424 Hafez Ave, Tehran, P.O.B. 159163-4311, Iran

    Hassan Rahimzadeh

  3. Department of Civil Engineering, Faculty of Engineering, Hakim Sabzevari University, 379 Tohid Shahr, Sabzevar, P.O.B. 9617916487, Iran

    Hamed Sarkardeh

Authors
  1. Morteza Monshizadeh
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  2. Ahmad Tahershamsi
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  3. Hassan Rahimzadeh
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  4. Hamed Sarkardeh
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Correspondence to Ahmad Tahershamsi.

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Monshizadeh, M., Tahershamsi, A., Rahimzadeh, H. et al. Vortex Dissipation Using a Hydraulic-Based Anti-Vortex Device at Intakes. Int J Civ Eng 16, 1137–1144 (2018). https://doi.org/10.1007/s40999-017-0266-8

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  • DOI: https://doi.org/10.1007/s40999-017-0266-8

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