Flow Pattern Investigation at Bridge Abutment with and without Installed Submerged Vane
In this paper the results of measurement of three components of flow velocity around the bridge abutment with and without installed submerged vane are presented. Previous studies have shown that installation of submerged vane at the upstream corner of bridge abutment with angle of 40 degrees can dec...
| Main Authors: | , , |
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| Format: | Article |
| Language: | fas |
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Shahid Chamran University of Ahvaz
2014-09-01
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| Series: | علوم و مهندسی آبیاری |
| Subjects: | |
| Online Access: | http://jise.scu.ac.ir/article_10844_4fe6ae7731ae87a605115ed4d3b56f83.pdf |
| _version_ | 1818905090083258368 |
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| author | Kheiralah Khademi Mahmood Shafaeebajestan Mehdi Ghomeshi |
| author_facet | Kheiralah Khademi Mahmood Shafaeebajestan Mehdi Ghomeshi |
| author_sort | Kheiralah Khademi |
| collection | DOAJ |
| description | In this paper the results of measurement of three components of flow velocity around the bridge abutment with and without installed submerged vane are presented. Previous studies have shown that installation of submerged vane at the upstream corner of bridge abutment with angle of 40 degrees can decrease the scour depth. Plot of horizontal flow velocity components in different level, for both alternatives, with and without submerged vane, shows that the velocity vector at lower layer closed to the bed are shifted away from the abutment which causes that local bed shear stress are reduced and the scour at the vicinity of abutment reduced. The lower layer of stream lines are compressed at the edge of vane which cause scour at this location. It was proven that using submerged vane does not causes compression of the stream lines more than it usually occur due to abutment contraction. This means that the scour is shifted but the scour depth does not increase. Comparison of water surface profiles for with and without vane shows that the drop or lift of the water surface with vane is not significant and the change is in the safe way. Plot of vertical flow velocity vectors shows that the downward velocity has shifted from the abutment vicinity, in case of without vane, to the lower layers of the edge of submerged vane. |
| first_indexed | 2024-12-19T21:17:48Z |
| format | Article |
| id | doaj.art-d130a0add0094871a83b4000fa440780 |
| institution | Directory Open Access Journal |
| issn | 2588-5952 2588-5960 |
| language | fas |
| last_indexed | 2024-12-19T21:17:48Z |
| publishDate | 2014-09-01 |
| publisher | Shahid Chamran University of Ahvaz |
| record_format | Article |
| series | علوم و مهندسی آبیاری |
| spelling | doaj.art-d130a0add0094871a83b4000fa4407802022-12-21T20:05:19ZfasShahid Chamran University of Ahvazعلوم و مهندسی آبیاری2588-59522588-59602014-09-01371334210844Flow Pattern Investigation at Bridge Abutment with and without Installed Submerged VaneKheiralah Khademi0Mahmood Shafaeebajestan1Mehdi Ghomeshi2Ph.d Graduated Student Department of Hydraulic Structures, Shahid Chamran University, Ahvaz, Iranاستاد گروه سازه های آبی، دانشکده مهندسی علوم آب، دانشگاه شهید چمران، اهوازProfessor, Department of Hydraulic Structures, Shahid Chamran University, Ahaz, IranIn this paper the results of measurement of three components of flow velocity around the bridge abutment with and without installed submerged vane are presented. Previous studies have shown that installation of submerged vane at the upstream corner of bridge abutment with angle of 40 degrees can decrease the scour depth. Plot of horizontal flow velocity components in different level, for both alternatives, with and without submerged vane, shows that the velocity vector at lower layer closed to the bed are shifted away from the abutment which causes that local bed shear stress are reduced and the scour at the vicinity of abutment reduced. The lower layer of stream lines are compressed at the edge of vane which cause scour at this location. It was proven that using submerged vane does not causes compression of the stream lines more than it usually occur due to abutment contraction. This means that the scour is shifted but the scour depth does not increase. Comparison of water surface profiles for with and without vane shows that the drop or lift of the water surface with vane is not significant and the change is in the safe way. Plot of vertical flow velocity vectors shows that the downward velocity has shifted from the abutment vicinity, in case of without vane, to the lower layers of the edge of submerged vane.http://jise.scu.ac.ir/article_10844_4fe6ae7731ae87a605115ed4d3b56f83.pdfsubmerged vanelocal scourerosion controlriverabutment |
| spellingShingle | Kheiralah Khademi Mahmood Shafaeebajestan Mehdi Ghomeshi Flow Pattern Investigation at Bridge Abutment with and without Installed Submerged Vane علوم و مهندسی آبیاری submerged vane local scour erosion control river abutment |
| title | Flow Pattern Investigation at Bridge Abutment with and without Installed
Submerged Vane |
| title_full | Flow Pattern Investigation at Bridge Abutment with and without Installed
Submerged Vane |
| title_fullStr | Flow Pattern Investigation at Bridge Abutment with and without Installed
Submerged Vane |
| title_full_unstemmed | Flow Pattern Investigation at Bridge Abutment with and without Installed
Submerged Vane |
| title_short | Flow Pattern Investigation at Bridge Abutment with and without Installed
Submerged Vane |
| title_sort | flow pattern investigation at bridge abutment with and without installed submerged vane |
| topic | submerged vane local scour erosion control river abutment |
| url | http://jise.scu.ac.ir/article_10844_4fe6ae7731ae87a605115ed4d3b56f83.pdf |
| work_keys_str_mv | AT kheiralahkhademi flowpatterninvestigationatbridgeabutmentwithandwithoutinstalledsubmergedvane AT mahmoodshafaeebajestan flowpatterninvestigationatbridgeabutmentwithandwithoutinstalledsubmergedvane AT mehdighomeshi flowpatterninvestigationatbridgeabutmentwithandwithoutinstalledsubmergedvane |