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Free-Surface Vortices Mitigation using Anti-Vortex Plates in Dam Intakes through CFD

By recording parameters such as velocity and volume fraction by contour plots or plane, a CFD model enables to analyse flow patterns in the model, such as free-surface vortices A free-surface vortex, a common problem may indeed be observed in a variety of submerged water intakes, notably shallow bas...

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Main Authors: Manogaran T., Mohd Arif Zainol M.R.R., Wahab M.K.A., Abdul Aziz M.S., Abd Aziz N., Zahari N.M., Zawawi M.H., Mohd Radzi M.R.
Other Authors: 58251597400
Format: Article
Published: Semarak Ilmu Publishing 2024
Subjects:
Anti-Vortex Plates
Dam Modelling
Disaster
Flow Characteristics
Free-Surface Vortices
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spelling my.uniten.dspace-346372024-10-14T11:21:18Z Free-Surface Vortices Mitigation using Anti-Vortex Plates in Dam Intakes through CFD Manogaran T. Mohd Arif Zainol M.R.R. Wahab M.K.A. Abdul Aziz M.S. Abd Aziz N. Zahari N.M. Zawawi M.H. Mohd Radzi M.R. 58251597400 57193313971 57212552842 36695908700 57201665672 54891672300 39162217600 57223347606 Anti-Vortex Plates Dam Modelling Disaster Flow Characteristics Free-Surface Vortices By recording parameters such as velocity and volume fraction by contour plots or plane, a CFD model enables to analyse flow patterns in the model, such as free-surface vortices A free-surface vortex, a common problem may indeed be observed in a variety of submerged water intakes, notably shallow basins and low head intakes. These FSVs are likely to form an air-core vortex, eventually entrapping detritus and air pockets in the water intake system and causing further vibration and damage to the downstream turbine. When paired with a high velocity, the formation of vortices in the system been known to produce hydraulic transients, which cause unwanted operation or pressure changes. The model of the 1:100 scale dam reservoir was generated, computationally meshed, and modelled in FLUENT under ANSYS 2019 R3 at two different water levels to observe the FSV formations. To mitigate those FSV formations, anti-vortex plates with two distinct plates�square and wedge�were used. From the findings square plates outperform wedge plates because square it lowers the speed of a fast-flowing fluid and reduces it into a laminar flow rather of a turbulent flow, which benefits vortex class deterioration. Data from the simulation and experimental shows a strong agreement in terms of velocity at outlet 1 from both water levels with relative errors of 3.0% and 14.1% respectively. � 2023, Semarak Ilmu Publishing. All rights reserved. Final 2024-10-14T03:21:18Z 2024-10-14T03:21:18Z 2023 Article 10.37934/cfdl.15.6.2641 2-s2.0-85159393454 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85159393454&doi=10.37934%2fcfdl.15.6.2641&partnerID=40&md5=ba0aec4a2e437d11f6259ae743577088 https://irepository.uniten.edu.my/handle/123456789/34637 15 6 26 41 All Open Access Hybrid Gold Open Access Semarak Ilmu Publishing Scopus
institution Universiti Tenaga Nasional
building UNITEN Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tenaga Nasional
content_source UNITEN Institutional Repository
url_provider http://dspace.uniten.edu.my/
topic Anti-Vortex Plates
Dam Modelling
Disaster
Flow Characteristics
Free-Surface Vortices
spellingShingle Anti-Vortex Plates
Dam Modelling
Disaster
Flow Characteristics
Free-Surface Vortices
Manogaran T.
Mohd Arif Zainol M.R.R.
Wahab M.K.A.
Abdul Aziz M.S.
Abd Aziz N.
Zahari N.M.
Zawawi M.H.
Mohd Radzi M.R.
Free-Surface Vortices Mitigation using Anti-Vortex Plates in Dam Intakes through CFD
description By recording parameters such as velocity and volume fraction by contour plots or plane, a CFD model enables to analyse flow patterns in the model, such as free-surface vortices A free-surface vortex, a common problem may indeed be observed in a variety of submerged water intakes, notably shallow basins and low head intakes. These FSVs are likely to form an air-core vortex, eventually entrapping detritus and air pockets in the water intake system and causing further vibration and damage to the downstream turbine. When paired with a high velocity, the formation of vortices in the system been known to produce hydraulic transients, which cause unwanted operation or pressure changes. The model of the 1:100 scale dam reservoir was generated, computationally meshed, and modelled in FLUENT under ANSYS 2019 R3 at two different water levels to observe the FSV formations. To mitigate those FSV formations, anti-vortex plates with two distinct plates�square and wedge�were used. From the findings square plates outperform wedge plates because square it lowers the speed of a fast-flowing fluid and reduces it into a laminar flow rather of a turbulent flow, which benefits vortex class deterioration. Data from the simulation and experimental shows a strong agreement in terms of velocity at outlet 1 from both water levels with relative errors of 3.0% and 14.1% respectively. � 2023, Semarak Ilmu Publishing. All rights reserved.
author2 58251597400
author_facet 58251597400
Manogaran T.
Mohd Arif Zainol M.R.R.
Wahab M.K.A.
Abdul Aziz M.S.
Abd Aziz N.
Zahari N.M.
Zawawi M.H.
Mohd Radzi M.R.
format Article
author Manogaran T.
Mohd Arif Zainol M.R.R.
Wahab M.K.A.
Abdul Aziz M.S.
Abd Aziz N.
Zahari N.M.
Zawawi M.H.
Mohd Radzi M.R.
author_sort Manogaran T.
title Free-Surface Vortices Mitigation using Anti-Vortex Plates in Dam Intakes through CFD
title_short Free-Surface Vortices Mitigation using Anti-Vortex Plates in Dam Intakes through CFD
title_full Free-Surface Vortices Mitigation using Anti-Vortex Plates in Dam Intakes through CFD
title_fullStr Free-Surface Vortices Mitigation using Anti-Vortex Plates in Dam Intakes through CFD
title_full_unstemmed Free-Surface Vortices Mitigation using Anti-Vortex Plates in Dam Intakes through CFD
title_sort free-surface vortices mitigation using anti-vortex plates in dam intakes through cfd
publisher Semarak Ilmu Publishing
publishDate 2024
_version_ 1814061130833723392
score 13.222552

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