Protection of Offshore Pipelines with Adding a Longitudinal Blade beneath the Pipe
A number of experiments have been carried out in the current paper to investigate the effect of adding a longitudinal impermeable blade beneath the offshore pipelines on decreasing the scour around them. The main aim of this study was to reduce the hydraulics gradient beneath the pipe so that its ma...
| Main Authors: | , |
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| Format: | Article |
| Language: | fas |
| Published: |
Iranian Association of Naval Architecture and Marine Engineering
2016-03-01
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| Series: | نشریه مهندسی دریا |
| Subjects: | |
| Online Access: | http://marine-eng.ir/article-1-395-en.html |
| _version_ | 1818991590601916416 |
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| author | Habib Hakimzadeh Alireza Mohammadi |
| author_facet | Habib Hakimzadeh Alireza Mohammadi |
| author_sort | Habib Hakimzadeh |
| collection | DOAJ |
| description | A number of experiments have been carried out in the current paper to investigate the effect of adding a longitudinal impermeable blade beneath the offshore pipelines on decreasing the scour around them. The main aim of this study was to reduce the hydraulics gradient beneath the pipe so that its magnitude recedes from the critical hydraulics gradient and therefore delays the onset of scour phenomenon or stops its process at all. Three pipes of different diameters were selected for the physical models of this study. Each pipe was tested using six blades with different relative widths. Also, a series of numerical simulations have been done using Flow3D software in which the similar boundary conditions as used for the physical models were applied. In both experimental and numerical investigations the reference sample that was an unprotected pipeline was first tested. Then blades with different relative widths (e.g, 0.05, 0.10, 0.15, 0.20, 0.25, 0.50) were added to the beneath of the pipeline and their performances were tested and analyzed against scour. The experimental and numerical results were in good agreement and they indicate a remarkable reduction in scour depth when a blade with the distinctive relative width was sticked to the pipeline. |
| first_indexed | 2024-12-20T20:12:41Z |
| format | Article |
| id | doaj.art-baff9c7f47f943429e568df524ec3684 |
| institution | Directory Open Access Journal |
| issn | 1735-7608 2645-8136 |
| language | fas |
| last_indexed | 2024-12-20T20:12:41Z |
| publishDate | 2016-03-01 |
| publisher | Iranian Association of Naval Architecture and Marine Engineering |
| record_format | Article |
| series | نشریه مهندسی دریا |
| spelling | doaj.art-baff9c7f47f943429e568df524ec36842022-12-21T19:27:47ZfasIranian Association of Naval Architecture and Marine Engineeringنشریه مهندسی دریا1735-76082645-81362016-03-0111222538Protection of Offshore Pipelines with Adding a Longitudinal Blade beneath the PipeHabib Hakimzadeh0Alireza Mohammadi1 Sahand University of Technology A number of experiments have been carried out in the current paper to investigate the effect of adding a longitudinal impermeable blade beneath the offshore pipelines on decreasing the scour around them. The main aim of this study was to reduce the hydraulics gradient beneath the pipe so that its magnitude recedes from the critical hydraulics gradient and therefore delays the onset of scour phenomenon or stops its process at all. Three pipes of different diameters were selected for the physical models of this study. Each pipe was tested using six blades with different relative widths. Also, a series of numerical simulations have been done using Flow3D software in which the similar boundary conditions as used for the physical models were applied. In both experimental and numerical investigations the reference sample that was an unprotected pipeline was first tested. Then blades with different relative widths (e.g, 0.05, 0.10, 0.15, 0.20, 0.25, 0.50) were added to the beneath of the pipeline and their performances were tested and analyzed against scour. The experimental and numerical results were in good agreement and they indicate a remarkable reduction in scour depth when a blade with the distinctive relative width was sticked to the pipeline.http://marine-eng.ir/article-1-395-en.htmloffshore pipelinesscourlongitudinal bladeexperimental modelnumerical model |
| spellingShingle | Habib Hakimzadeh Alireza Mohammadi Protection of Offshore Pipelines with Adding a Longitudinal Blade beneath the Pipe نشریه مهندسی دریا offshore pipelines scour longitudinal blade experimental model numerical model |
| title | Protection of Offshore Pipelines with Adding a Longitudinal Blade beneath the Pipe |
| title_full | Protection of Offshore Pipelines with Adding a Longitudinal Blade beneath the Pipe |
| title_fullStr | Protection of Offshore Pipelines with Adding a Longitudinal Blade beneath the Pipe |
| title_full_unstemmed | Protection of Offshore Pipelines with Adding a Longitudinal Blade beneath the Pipe |
| title_short | Protection of Offshore Pipelines with Adding a Longitudinal Blade beneath the Pipe |
| title_sort | protection of offshore pipelines with adding a longitudinal blade beneath the pipe |
| topic | offshore pipelines scour longitudinal blade experimental model numerical model |
| url | http://marine-eng.ir/article-1-395-en.html |
| work_keys_str_mv | AT habibhakimzadeh protectionofoffshorepipelineswithaddingalongitudinalbladebeneaththepipe AT alirezamohammadi protectionofoffshorepipelineswithaddingalongitudinalbladebeneaththepipe |