Back to Search
Start Over
A Design for Vortex Suppression Downstream of a Submerged Gate
- Source :
- Water, Volume 12, Issue 3, Water, Vol 12, Iss 3, p 750 (2020)
- Publication Year :
- 2020
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2020.
-
Abstract
- Interaction of recirculating and mean flow downstream of a submerged gate may form significant vortex structures, which may affect the stability of the gate. Although these flow structures that appear in submerged hydraulic jumps received considerable attention in the literature, relatively less work was devoted to the analysis and suppression of the vortex structures downstream of a submerged gate. In this work, internal flow structure and vortex dynamics around a submerged gate were investigated through laboratory tests and large-eddy simulation (LES) using computational fluid dynamics (CFD). It is shown that numerical results obtained for mean velocity field are in good agreement with the experimental measurements. A helical vortex pair connected with a horseshoe vortex system was identified within the roller region using high-resolution numerical simulations. Damping performance of different types of anti-vortex elements placed on the downstream face of the gate are evaluated based on numerical studies. It is shown that the horizontal porous baffle mounted at an elevation below the free surface reduced the vortex magnitudes in the roller region by 26.8%. With the implementation of the proposed vortex breaker, lift forces acting on the gate lip were reduced by 9.4% and drag forces acting on the downstream face of the gate were reduced by 8.6%. Finally, in this study, we assess the performance of the vortex breaker under different flow conditions.
- Subjects :
- lcsh:Hydraulic engineering
Geography, Planning and Development
0207 environmental engineering
02 engineering and technology
010501 environmental sciences
Aquatic Science
01 natural sciences
Biochemistry
Physics::Fluid Dynamics
lcsh:Water supply for domestic and industrial purposes
lcsh:TC1-978
Horseshoe vortex
Mean flow
submerged jump
020701 environmental engineering
0105 earth and related environmental sciences
Water Science and Technology
Physics
lcsh:TD201-500
Internal flow
large eddy simulation
Vortex breaker
Mechanics
Vorticity
Vortex
Lift (force)
Drag
vertical gate
anti-vortex element
Subjects
Details
- Language :
- English
- ISSN :
- 20734441
- Database :
- OpenAIRE
- Journal :
- Water
- Accession number :
- edsair.doi.dedup.....60667a333b8d13d72e9285dce6f2b61b
- Full Text :
- https://doi.org/10.3390/w12030750