Aeration performance of high-head siphon-shaft spillways by CFD models
Abstract Siphon-shaft spillways are constituted by covering above a shaft spillway with a hood that creates siphonic pressure. This study focused on the aeration the flow through the aerator holes placed on the hood to prevent cavitational damage in high-head siphon-shaft spillways. Three-dimensiona...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2021-09-01
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| Series: | Applied Water Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s13201-021-01496-0 |
| _version_ | 1819153874251939840 |
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| author | M. Cihan Aydin Ali Emre Ulu |
| author_facet | M. Cihan Aydin Ali Emre Ulu |
| author_sort | M. Cihan Aydin |
| collection | DOAJ |
| description | Abstract Siphon-shaft spillways are constituted by covering above a shaft spillway with a hood that creates siphonic pressure. This study focused on the aeration the flow through the aerator holes placed on the hood to prevent cavitational damage in high-head siphon-shaft spillways. Three-dimensional computational fluid dynamics (CFD) technique using finite-volume method to solve Reynolds-averaged Navier–Stokes (RANS) equations for the incompressible viscous and turbulent fluids motion was performed to analyze the full-scaled two-phase numerical models. The volume of fluid (VOF) scheme was used to simulate two-phase (water–air) flow, by defining the volume fraction for each of the fluids throughout the solution domain. The accuracy of the numerical model was tested using a procedure recommended by American Society of Mechanical Engineers (ASME) for CFD applications. The numerical results showed that the aeration is highly effective in reducing siphon sub-pressures and cavitation. The optimal relative aeration diameter of 0.45 provided sufficient air entrainment to protect from cavitation and did not decrease the discharge performance too much. |
| first_indexed | 2024-12-22T15:12:07Z |
| format | Article |
| id | doaj.art-a3ae4972c7b549b1952a2f3525798ca6 |
| institution | Directory Open Access Journal |
| issn | 2190-5487 2190-5495 |
| language | English |
| last_indexed | 2024-12-22T15:12:07Z |
| publishDate | 2021-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Applied Water Science |
| spelling | doaj.art-a3ae4972c7b549b1952a2f3525798ca62022-12-21T18:21:51ZengSpringerOpenApplied Water Science2190-54872190-54952021-09-01111011210.1007/s13201-021-01496-0Aeration performance of high-head siphon-shaft spillways by CFD modelsM. Cihan Aydin0Ali Emre Ulu1Department of Civil Engineering, Bitlis Eren UniversityDepartment of Civil Engineering, Bitlis Eren UniversityAbstract Siphon-shaft spillways are constituted by covering above a shaft spillway with a hood that creates siphonic pressure. This study focused on the aeration the flow through the aerator holes placed on the hood to prevent cavitational damage in high-head siphon-shaft spillways. Three-dimensional computational fluid dynamics (CFD) technique using finite-volume method to solve Reynolds-averaged Navier–Stokes (RANS) equations for the incompressible viscous and turbulent fluids motion was performed to analyze the full-scaled two-phase numerical models. The volume of fluid (VOF) scheme was used to simulate two-phase (water–air) flow, by defining the volume fraction for each of the fluids throughout the solution domain. The accuracy of the numerical model was tested using a procedure recommended by American Society of Mechanical Engineers (ASME) for CFD applications. The numerical results showed that the aeration is highly effective in reducing siphon sub-pressures and cavitation. The optimal relative aeration diameter of 0.45 provided sufficient air entrainment to protect from cavitation and did not decrease the discharge performance too much.https://doi.org/10.1007/s13201-021-01496-0Siphon-shaft spillwaysCavitationAerationComputational fluid dynamicsCFD |
| spellingShingle | M. Cihan Aydin Ali Emre Ulu Aeration performance of high-head siphon-shaft spillways by CFD models Applied Water Science Siphon-shaft spillways Cavitation Aeration Computational fluid dynamics CFD |
| title | Aeration performance of high-head siphon-shaft spillways by CFD models |
| title_full | Aeration performance of high-head siphon-shaft spillways by CFD models |
| title_fullStr | Aeration performance of high-head siphon-shaft spillways by CFD models |
| title_full_unstemmed | Aeration performance of high-head siphon-shaft spillways by CFD models |
| title_short | Aeration performance of high-head siphon-shaft spillways by CFD models |
| title_sort | aeration performance of high head siphon shaft spillways by cfd models |
| topic | Siphon-shaft spillways Cavitation Aeration Computational fluid dynamics CFD |
| url | https://doi.org/10.1007/s13201-021-01496-0 |
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