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Numerical Simulation of Air-Core Vortex at Intake


Affiliations
1 Department of Water and Environmental Engineering, Shahid Beheshti University, East Vafadar Blvd., Tehranpars, Tehran 167651719, Iran, Islamic Republic of
2 Department of Civil Engineering, Hakim Sabzevari University, Tohid Shahr, Sabzevar 9617976487, Iran, Islamic Republic of
 

In order to study the features of vortex at horizontal intakes, numerical investigations have been performed. The tangential, radial, and axial distributions, and water surface profile were simulated to evaluate the flow behaviour and existence of an air-core vortex. The numerical results agree with existing experimental data. The correlation of vortex characteristics between numerical and experimental results was good. Regarding formed funnel profile of flow in the basin towards horizontal intake, its limits at the existence of an air-core vortex were analysed. The spiral flow pattern from surface towards intake was identified around the air-core vortex. This numerical simulation may help to get a deeper understanding in determining the submergence required to avoid air-entraining vortices in a reservoir.

Keywords

Air-Core Vortex, Flow Pattern, Numerical Simulation, Velocity Components, Water Surface Profile.
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  • Numerical Simulation of Air-Core Vortex at Intake

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Authors

Behrouz Khadem Rabe
Department of Water and Environmental Engineering, Shahid Beheshti University, East Vafadar Blvd., Tehranpars, Tehran 167651719, Iran, Islamic Republic of
Seyyed Hossein Ghoreishi Najafabadi
Department of Water and Environmental Engineering, Shahid Beheshti University, East Vafadar Blvd., Tehranpars, Tehran 167651719, Iran, Islamic Republic of
Hamed Sarkardeh
Department of Civil Engineering, Hakim Sabzevari University, Tohid Shahr, Sabzevar 9617976487, Iran, Islamic Republic of

Abstract


In order to study the features of vortex at horizontal intakes, numerical investigations have been performed. The tangential, radial, and axial distributions, and water surface profile were simulated to evaluate the flow behaviour and existence of an air-core vortex. The numerical results agree with existing experimental data. The correlation of vortex characteristics between numerical and experimental results was good. Regarding formed funnel profile of flow in the basin towards horizontal intake, its limits at the existence of an air-core vortex were analysed. The spiral flow pattern from surface towards intake was identified around the air-core vortex. This numerical simulation may help to get a deeper understanding in determining the submergence required to avoid air-entraining vortices in a reservoir.

Keywords


Air-Core Vortex, Flow Pattern, Numerical Simulation, Velocity Components, Water Surface Profile.

References





DOI: https://doi.org/10.18520/cs%2Fv113%2Fi01%2F141-147